/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {setup} from '@angular/compiler/test/aot/test_util';

import {DEFAULT_INTERPOLATION_CONFIG} from '../../../compiler/src/compiler';
import {decimalDigest} from '../../../compiler/src/i18n/digest';
import {extractMessages} from '../../../compiler/src/i18n/extractor_merger';
import {HtmlParser} from '../../../compiler/src/ml_parser/html_parser';

import {compile, expectEmit} from './mock_compile';

const angularFiles = setup({
  compileAngular: false,
  compileFakeCore: true,
  compileAnimations: false,
});

const htmlParser = new HtmlParser();

const diff = (a: Set<string>, b: Set<string>): Set<string> =>
    new Set([...Array.from(a)].filter(x => !b.has(x)));

const extract = (from: string, regex: any, transformFn: (match: any[]) => any) => {
  const result = new Set<string>();
  let item;
  while ((item = regex.exec(from)) !== null) {
    result.add(transformFn(item));
  }
  return result;
};

// verify that we extracted all the necessary translations
// and their ids match the ones extracted via 'ng xi18n'
const verifyTranslationIds = (source: string, output: string, exceptions = {}) => {
  const parseResult = htmlParser.parse(source, 'path:://to/template', true);
  const extractedIdToMsg = new Map<string, any>();
  const extractedIds = new Set<string>();
  const generatedIds = new Set<string>();
  const msgs = extractMessages(parseResult.rootNodes, DEFAULT_INTERPOLATION_CONFIG, [], {});
  msgs.messages.forEach(msg => {
    const id = msg.id || decimalDigest(msg);
    extractedIds.add(id);
    extractedIdToMsg.set(id, msg);
  });
  const regexp = /const\s*MSG_EXTERNAL_(.+?)\s*=\s*goog\.getMsg/g;
  const ids = extract(output, regexp, v => v[1]);
  ids.forEach(id => { generatedIds.add(id.split('$$')[0]); });
  const delta = diff(extractedIds, generatedIds);
  if (delta.size) {
    // check if we have ids in exception list
    const outstanding = diff(delta, new Set(Object.keys(exceptions)));
    if (outstanding.size) {
      throw new Error(`
        Extracted and generated IDs don't match, delta:
        ${JSON.stringify(Array.from(delta))}
      `);
    }
  }
  return true;
};

// verify that placeholders in translation string match
// placeholders object defined as goog.getMsg function argument
const verifyPlaceholdersIntegrity = (output: string) => {
  const extactTranslations = (from: string) => {
    const regex = /const\s*(.*?)\s*=\s*goog\.getMsg\("(.*?)",?\s*(.*?)\)/g;
    return extract(from, regex, v => [v[2], v[3]]);
  };
  const extractPlaceholdersFromBody = (body: string) => {
    const regex = /{\$(.*?)}/g;
    return extract(body, regex, v => v[1]);
  };
  const extractPlaceholdersFromArgs = (args: string) => {
    const regex = /\s+"(.+?)":\s*".*?"/g;
    return extract(args, regex, v => v[1]);
  };
  const translations = extactTranslations(output);
  translations.forEach((translation) => {
    const bodyPhs = extractPlaceholdersFromBody(translation[0]);
    const argsPhs = extractPlaceholdersFromArgs(translation[1]);
    if (bodyPhs.size !== argsPhs.size || diff(bodyPhs, argsPhs).size) {
      return false;
    }
  });
  return true;
};

const getAppFilesWithTemplate = (template: string, args: any = {}) => ({
  app: {
    'spec.ts': `
      import {Component, NgModule} from '@angular/core';

      @Component({
        selector: 'my-component',
        ${args.preserveWhitespaces ? 'preserveWhitespaces: true,' : ''}
        template: \`${template}\`
      })
      export class MyComponent {}

      @NgModule({declarations: [MyComponent]})
      export class MyModule {}
    `
  }
});

const maybePrint = (output: string, verbose: boolean) => {
  if (!verbose) return;
  // tslint:disable-next-line
  console.log(`
========== Generated output: ==========
${output}
=======================================
  `);
};

const verify = (input: string, output: string, extra: any = {}): void => {
  const files = getAppFilesWithTemplate(input, extra.inputArgs);
  const opts = (i18nUseExternalIds: boolean) =>
      ({i18nUseExternalIds, ...(extra.compilerOptions || {})});

  // invoke with file-based prefix translation names
  let result = compile(files, angularFiles, opts(false));
  maybePrint(result.source, extra.verbose);
  expect(verifyPlaceholdersIntegrity(result.source)).toBe(true);
  expectEmit(result.source, output, 'Incorrect template');

  if (extra.skipIdBasedCheck) return;

  // invoke with translation names based on external ids
  result = compile(files, angularFiles, opts(true));
  maybePrint(result.source, extra.verbose);
  expect(verifyTranslationIds(input, result.source, extra.exceptions)).toBe(true);
  expect(verifyPlaceholdersIntegrity(result.source)).toBe(true);
  expectEmit(result.source, output, 'Incorrect template');
};

describe('i18n support in the view compiler', () => {

  describe('element attributes', () => {
    it('should add the meaning and description as JsDoc comments', () => {
      const input = `
        <div i18n="meaningA|descA@@idA">Content A</div>
        <div i18n-title="meaningB|descB@@idB" title="Title B">Content B</div>
        <div i18n-title="meaningC" title="Title C">Content C</div>
        <div i18n-title="meaningD|descD" title="Title D">Content D</div>
        <div i18n-title="meaningE@@idE" title="Title E">Content E</div>
        <div i18n-title="@@idF" title="Title F">Content F</div>
        <div i18n-title="[BACKUP_MESSAGE_ID:idH]desc@@idG" title="Title G">Content G</div>
      `;

      const output = `
        /**
         * @desc descA
         * @meaning meaningA
         */
        const $MSG_EXTERNAL_idA$ = goog.getMsg("Content A");
        /**
         * @desc descB
         * @meaning meaningB
         */
        const $MSG_EXTERNAL_idB$ = goog.getMsg("Title B");
        const $_c0$ = ["title", $MSG_EXTERNAL_idB$];
        /**
         * @desc meaningC
         */
        const $MSG_EXTERNAL_4978592519614169666$ = goog.getMsg("Title C");
        const $_c1$ = ["title", $MSG_EXTERNAL_4978592519614169666$];
        /**
         * @desc descD
         * @meaning meaningD
         */
        const $MSG_EXTERNAL_5200291527729162531$ = goog.getMsg("Title D");
        const $_c2$ = ["title", $MSG_EXTERNAL_5200291527729162531$];
        /**
         * @desc meaningE
         */
        const $MSG_EXTERNAL_idE$ = goog.getMsg("Title E");
        const $_c3$ = ["title", $MSG_EXTERNAL_idE$];
        const $MSG_EXTERNAL_idF$ = goog.getMsg("Title F");
        const $_c4$ = ["title", $MSG_EXTERNAL_idF$];
        /**
         * @desc [BACKUP_MESSAGE_ID:idH]desc
         */
        const $MSG_EXTERNAL_idG$ = goog.getMsg("Title G");
        const $_c5$ = ["title", $MSG_EXTERNAL_idG$];
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_idA$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(2, "div");
            $r3$.ɵi18nAttributes(3, $_c0$);
            $r3$.ɵtext(4, "Content B");
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(5, "div");
            $r3$.ɵi18nAttributes(6, $_c1$);
            $r3$.ɵtext(7, "Content C");
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(8, "div");
            $r3$.ɵi18nAttributes(9, $_c2$);
            $r3$.ɵtext(10, "Content D");
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(11, "div");
            $r3$.ɵi18nAttributes(12, $_c3$);
            $r3$.ɵtext(13, "Content E");
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(14, "div");
            $r3$.ɵi18nAttributes(15, $_c4$);
            $r3$.ɵtext(16, "Content F");
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(17, "div");
            $r3$.ɵi18nAttributes(18, $_c5$);
            $r3$.ɵtext(19, "Content G");
            $r3$.ɵelementEnd();
          }
        }
      `;

      verify(input, output);
    });

    it('should not create translations for empty attributes', () => {
      const input = `
        <div id="static" i18n-title="m|d" title></div>
      `;

      const output = `
        const $_c0$ = ["id", "static", "title", ""];
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelement(0, "div", $_c0$);
          }
        }
      `;

      verify(input, output);
    });

    it('should translate static attributes', () => {
      const input = `
        <div id="static" i18n-title="m|d" title="introduction"></div>
      `;

      const output = `
        const $_c0$ = ["id", "static"];
        /**
         * @desc d
         * @meaning m
         */
        const $MSG_EXTERNAL_8809028065680254561$ = goog.getMsg("introduction");
        const $_c1$ = ["title", $MSG_EXTERNAL_8809028065680254561$];
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div", $_c0$);
            $r3$.ɵi18nAttributes(1, $_c1$);
            $r3$.ɵelementEnd();
          }
        }
      `;

      verify(input, output);
    });

    it('should support interpolation', () => {
      const input = `
        <div id="dynamic-1"
          i18n-title="m|d" title="intro {{ valueA | uppercase }}"
          i18n-aria-label="m1|d1" aria-label="{{ valueB }}"
          i18n-aria-roledescription aria-roledescription="static text"
        ></div>
        <div id="dynamic-2"
          i18n-title="m2|d2" title="{{ valueA }} and {{ valueB }} and again {{ valueA + valueB }}"
          i18n-aria-roledescription aria-roledescription="{{ valueC }}"
        ></div>
      `;

      const output = String.raw `
        const $_c0$ = ["id", "dynamic-1"];
        const $MSG_EXTERNAL_5526535577705876535$ = goog.getMsg("static text");
        /**
         * @desc d
         * @meaning m
         */
        const $MSG_EXTERNAL_8977039798304050198$ = goog.getMsg("intro {$interpolation}", {
          "interpolation": "\uFFFD0\uFFFD"
        });
        /**
         * @desc d1
         * @meaning m1
         */
        const $MSG_EXTERNAL_7432761130955693041$ = goog.getMsg("{$interpolation}", {
          "interpolation": "\uFFFD0\uFFFD"
        });
        const $_c1$ = [
          "aria-roledescription", $MSG_EXTERNAL_5526535577705876535$,
          "title", $MSG_EXTERNAL_8977039798304050198$,
          "aria-label", $MSG_EXTERNAL_7432761130955693041$
        ];
        const $_c2$ = ["id", "dynamic-2"];
        /**
         * @desc d2
         * @meaning m2
         */
        const $MSG_EXTERNAL_7566208596013750546$ = goog.getMsg("{$interpolation} and {$interpolation_1} and again {$interpolation_2}", {
          "interpolation": "\uFFFD0\uFFFD",
          "interpolation_1": "\uFFFD1\uFFFD",
          "interpolation_2": "\uFFFD2\uFFFD"
        });
        const $MSG_EXTERNAL_6639222533406278123$ = goog.getMsg("{$interpolation}", { "interpolation": "\uFFFD0\uFFFD" });
        const $_c3$ = ["title", $MSG_EXTERNAL_7566208596013750546$, "aria-roledescription", $MSG_EXTERNAL_6639222533406278123$];
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div", $_c0$);
            $r3$.ɵpipe(1, "uppercase");
            $r3$.ɵi18nAttributes(2, $_c1$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(3, "div", $_c2$);
            $r3$.ɵi18nAttributes(4, $_c3$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(1, 0, ctx.valueA)));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueB));
            $r3$.ɵi18nApply(2);
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueA));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueB));
            $r3$.ɵi18nExp($r3$.ɵbind((ctx.valueA + ctx.valueB)));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueC));
            $r3$.ɵi18nApply(4);
          }
        }
      `;

      verify(input, output);
    });

    it('should correctly bind to context in nested template', () => {
      const input = `
        <div *ngFor="let outer of items">
          <div i18n-title="m|d" title="different scope {{ outer | uppercase }}">
        </div>
      `;

      const output = String.raw `
        const $_c0$ = ["ngFor", "", 1, "ngForOf"];
        /**
         * @desc d
         * @meaning m
         */
        const $MSG_EXTERNAL_8538466649243975456$ = goog.getMsg("different scope {$interpolation}", {
          "interpolation": "\uFFFD0\uFFFD"
        });
        const $_c1$ = ["title", $MSG_EXTERNAL_8538466649243975456$];
        function MyComponent_div_Template_0(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵelementStart(1, "div");
            $r3$.ɵpipe(2, "uppercase");
            $r3$.ɵi18nAttributes(3, $_c1$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            const $outer_r1$ = ctx.$implicit;
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(2, 0, $outer_r1$)));
            $r3$.ɵi18nApply(3);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵtemplate(0, MyComponent_div_Template_0, 4, 2, null, $_c0$);
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(0, "ngForOf", $r3$.ɵbind(ctx.items));
          }
        }
      `;

      verify(input, output);
    });

    it('should support interpolation', () => {
      const input = `
        <div id="dynamic-1"
          i18n-title="m|d" title="intro {{ valueA | uppercase }}"
          i18n-aria-label="m1|d1" aria-label="{{ valueB }}"
          i18n-aria-roledescription aria-roledescription="static text"
        ></div>
        <div id="dynamic-2"
          i18n-title="m2|d2" title="{{ valueA }} and {{ valueB }} and again {{ valueA + valueB }}"
          i18n-aria-roledescription aria-roledescription="{{ valueC }}"
        ></div>
      `;

      const output = String.raw `
        const $_c0$ = ["id", "dynamic-1"];
        const $MSG_EXTERNAL_5526535577705876535$ = goog.getMsg("static text");
        /**
         * @desc d
         * @meaning m
         */
        const $MSG_EXTERNAL_8977039798304050198$ = goog.getMsg("intro {$interpolation}", {
          "interpolation": "\uFFFD0\uFFFD"
        });
        /**
         * @desc d1
         * @meaning m1
         */
        const $MSG_EXTERNAL_7432761130955693041$ = goog.getMsg("{$interpolation}", { "interpolation": "\uFFFD0\uFFFD" });
        const $_c1$ = [
          "aria-roledescription", $MSG_EXTERNAL_5526535577705876535$,
          "title", $MSG_EXTERNAL_8977039798304050198$,
          "aria-label", $MSG_EXTERNAL_7432761130955693041$
        ];
        const $_c2$ = ["id", "dynamic-2"];
        /**
         * @desc d2
         * @meaning m2
         */
        const $MSG_EXTERNAL_7566208596013750546$ = goog.getMsg("{$interpolation} and {$interpolation_1} and again {$interpolation_2}", {
          "interpolation": "\uFFFD0\uFFFD",
          "interpolation_1": "\uFFFD1\uFFFD",
          "interpolation_2": "\uFFFD2\uFFFD"
        });
        const $MSG_EXTERNAL_6639222533406278123$ = goog.getMsg("{$interpolation}", { "interpolation": "\uFFFD0\uFFFD" });
        const $_c3$ = ["title", $MSG_EXTERNAL_7566208596013750546$, "aria-roledescription", $MSG_EXTERNAL_6639222533406278123$];
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div", $_c0$);
            $r3$.ɵpipe(1, "uppercase");
            $r3$.ɵi18nAttributes(2, $_c1$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(3, "div", $_c2$);
            $r3$.ɵi18nAttributes(4, $_c3$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(1, 0, ctx.valueA)));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueB));
            $r3$.ɵi18nApply(2);
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueA));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueB));
            $r3$.ɵi18nExp($r3$.ɵbind((ctx.valueA + ctx.valueB)));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueC));
            $r3$.ɵi18nApply(4);
          }
        }
      `;

      verify(input, output);
    });

    it('should correctly bind to context in nested template', () => {
      const input = `
        <div *ngFor="let outer of items">
          <div i18n-title="m|d" title="different scope {{ outer | uppercase }}">
        </div>
      `;

      const output = String.raw `
        const $_c0$ = ["ngFor", "", 1, "ngForOf"];
        /**
         * @desc d
         * @meaning m
         */
        const $MSG_EXTERNAL_8538466649243975456$ = goog.getMsg("different scope {$interpolation}", {
          "interpolation": "\uFFFD0\uFFFD"
        });
        const $_c1$ = ["title", $MSG_EXTERNAL_8538466649243975456$];
        function MyComponent_div_Template_0(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵelementStart(1, "div");
            $r3$.ɵpipe(2, "uppercase");
            $r3$.ɵi18nAttributes(3, $_c1$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            const $outer_r1$ = ctx.$implicit;
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(2, 0, $outer_r1$)));
            $r3$.ɵi18nApply(3);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵtemplate(0, MyComponent_div_Template_0, 4, 2, null, $_c0$);
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(0, "ngForOf", $r3$.ɵbind(ctx.items));
          }
        }
      `;

      verify(input, output);
    });

    it('should work correctly when placed on i18n root node', () => {
      const input = `
        <div i18n i18n-title="m|d" title="Element title">Some content</div>
      `;

      const output = String.raw `
        /**
         * @desc d
         * @meaning m
         */
        const $MSG_EXTERNAL_7727043314656808423$ = goog.getMsg("Element title");
        const $_c0$ = ["title", $MSG_EXTERNAL_7727043314656808423$];
        const $MSG_EXTERNAL_4969674997806975147$ = goog.getMsg("Some content");
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_4969674997806975147$);
            $r3$.ɵi18nAttributes(2, $_c0$);
            $r3$.ɵelementEnd();
          }
        }
      `;

      verify(input, output);
    });
  });

  describe('nested nodes', () => {
    it('should not produce instructions for empty content', () => {
      const input = `
        <div i18n></div>
        <div i18n>  </div>
        <div i18n>

        </div>
      `;

      const output = String.raw `
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelement(0, "div");
            $r3$.ɵelement(1, "div");
            $r3$.ɵelement(2, "div");
          }
        }
      `;

      const exceptions = {
        '6524085439495453930': 'No translation is produced for empty content (whitespaces)',
        '814405839137385666': 'No translation is produced for empty content (line breaks)'
      };
      verify(input, output, {exceptions});
    });

    it('should properly escape quotes in content', () => {
      const input = `
        <div i18n>Some text 'with single quotes', "with double quotes" and without quotes.</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_4924931801512133405$ = goog.getMsg("Some text 'with single quotes', \"with double quotes\" and without quotes.");
      `;

      verify(input, output);
    });

    it('should handle i18n attributes with plain-text content', () => {
      const input = `
        <div i18n>My i18n block #1</div>
        <div>My non-i18n block #1</div>
        <div i18n>My i18n block #2</div>
        <div>My non-i18n block #2</div>
        <div i18n>My i18n block #3</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_4890179241114413722$ = goog.getMsg("My i18n block #1");
        const $MSG_EXTERNAL_2413150872298537152$ = goog.getMsg("My i18n block #2");
        const $MSG_EXTERNAL_5023003143537152794$ = goog.getMsg("My i18n block #3");
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_4890179241114413722$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(2, "div");
            $r3$.ɵtext(3, "My non-i18n block #1");
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(4, "div");
            $r3$.ɵi18n(5, $MSG_EXTERNAL_2413150872298537152$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(6, "div");
            $r3$.ɵtext(7, "My non-i18n block #2");
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(8, "div");
            $r3$.ɵi18n(9, $MSG_EXTERNAL_5023003143537152794$);
            $r3$.ɵelementEnd();
          }
        }
      `;

      verify(input, output);
    });

    it('should support named interpolations', () => {
      const input = `
        <div i18n>Some value: {{ valueA // i18n(ph="PH_A") }}</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_2817319788724342848$ = goog.getMsg("Some value: {$phA}", { "phA": "\uFFFD0\uFFFD" });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_2817319788724342848$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueA));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle i18n attributes with bindings in content', () => {
      const input = `
        <div i18n>My i18n block #{{ one }}</div>
        <div i18n>My i18n block #{{ two | uppercase }}</div>
        <div i18n>My i18n block #{{ three + four + five }}</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_572579892698764378$ = goog.getMsg("My i18n block #{$interpolation}", { "interpolation": "\uFFFD0\uFFFD" });
        const $MSG_EXTERNAL_609623417156596326$ = goog.getMsg("My i18n block #{$interpolation}", { "interpolation": "\uFFFD0\uFFFD" });
        const $MSG_EXTERNAL_3998119318957372120$ = goog.getMsg("My i18n block #{$interpolation}", { "interpolation": "\uFFFD0\uFFFD" });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_572579892698764378$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(2, "div");
            $r3$.ɵi18n(3, $MSG_EXTERNAL_609623417156596326$);
            $r3$.ɵpipe(4, "uppercase");
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(5, "div");
            $r3$.ɵi18n(6, $MSG_EXTERNAL_3998119318957372120$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.one));
            $r3$.ɵi18nApply(1);
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(4, 0, ctx.two)));
            $r3$.ɵi18nApply(3);
            $r3$.ɵi18nExp($r3$.ɵbind(((ctx.three + ctx.four) + ctx.five)));
            $r3$.ɵi18nApply(6);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle i18n attributes with bindings and nested elements in content', () => {
      const input = `
        <div i18n>
          My i18n block #{{ one }}
          <span>Plain text in nested element</span>
        </div>
        <div i18n>
          My i18n block #{{ two | uppercase }}
          <div>
            <div>
              <span>
                More bindings in more nested element: {{ nestedInBlockTwo }}
              </span>
            </div>
          </div>
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_7905233330103651696$ = goog.getMsg(" My i18n block #{$interpolation} {$startTagSpan}Plain text in nested element{$closeTagSpan}", {
          "interpolation": "\uFFFD0\uFFFD",
          "startTagSpan": "\uFFFD#2\uFFFD",
          "closeTagSpan": "\uFFFD/#2\uFFFD"
        });
        const $MSG_EXTERNAL_5788821996131681377_RAW$ = goog.getMsg(" My i18n block #{$interpolation} {$startTagDiv}{$startTagDiv}{$startTagSpan} More bindings in more nested element: {$interpolation_1} {$closeTagSpan}{$closeTagDiv}{$closeTagDiv}", {
          "interpolation": "\uFFFD0\uFFFD",
          "startTagDiv": "[\uFFFD#6\uFFFD|\uFFFD#7\uFFFD]",
          "startTagSpan": "\uFFFD#8\uFFFD",
          "interpolation_1": "\uFFFD1\uFFFD",
          "closeTagSpan": "\uFFFD/#8\uFFFD",
          "closeTagDiv": "[\uFFFD/#7\uFFFD|\uFFFD/#6\uFFFD]"
        });
        const $MSG_EXTERNAL_5788821996131681377$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_5788821996131681377_RAW$);
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_EXTERNAL_7905233330103651696$);
            $r3$.ɵelement(2, "span");
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(3, "div");
            $r3$.ɵi18nStart(4, $MSG_EXTERNAL_5788821996131681377$);
            $r3$.ɵpipe(5, "uppercase");
            $r3$.ɵelementStart(6, "div");
            $r3$.ɵelementStart(7, "div");
            $r3$.ɵelement(8, "span");
            $r3$.ɵelementEnd();
            $r3$.ɵelementEnd();
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.one));
            $r3$.ɵi18nApply(1);
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(5, 0, ctx.two)));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.nestedInBlockTwo));
            $r3$.ɵi18nApply(4);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle i18n attributes with bindings in content and element attributes', () => {
      const input = `
        <div i18n>
          My i18n block #1 with value: {{ valueA }}
          <span i18n-title title="Span title {{ valueB }} and {{ valueC }}">
            Plain text in nested element (block #1)
          </span>
        </div>
        <div i18n>
          My i18n block #2 with value {{ valueD | uppercase }}
          <span i18n-title title="Span title {{ valueE }}">
            Plain text in nested element (block #2)
          </span>
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_4782264005467235841$ = goog.getMsg("Span title {$interpolation} and {$interpolation_1}", {
          "interpolation": "\uFFFD0\uFFFD",
          "interpolation_1": "\uFFFD1\uFFFD"
        });
        const $_c0$ = ["title", $MSG_EXTERNAL_4782264005467235841$];
        const $MSG_EXTERNAL_4446430594603971069$ = goog.getMsg(" My i18n block #1 with value: {$interpolation} {$startTagSpan} Plain text in nested element (block #1) {$closeTagSpan}", {
          "interpolation": "\uFFFD0\uFFFD",
          "startTagSpan": "\uFFFD#2\uFFFD",
          "closeTagSpan": "\uFFFD/#2\uFFFD"
        });
        const $MSG_EXTERNAL_2719594642740200058$ = goog.getMsg("Span title {$interpolation}", { "interpolation": "\uFFFD0\uFFFD" });
        const $_c1$ = ["title", $MSG_EXTERNAL_2719594642740200058$];
        const $MSG_EXTERNAL_2778714953278357902$ = goog.getMsg(" My i18n block #2 with value {$interpolation} {$startTagSpan} Plain text in nested element (block #2) {$closeTagSpan}", {
          "interpolation": "\uFFFD0\uFFFD",
          "startTagSpan": "\uFFFD#7\uFFFD",
          "closeTagSpan": "\uFFFD/#7\uFFFD"
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_EXTERNAL_4446430594603971069$);
            $r3$.ɵelementStart(2, "span");
            $r3$.ɵi18nAttributes(3, $_c0$);
            $r3$.ɵelementEnd();
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
            $r3$.ɵelementStart(4, "div");
            $r3$.ɵi18nStart(5, $MSG_EXTERNAL_2778714953278357902$);
            $r3$.ɵpipe(6, "uppercase");
            $r3$.ɵelementStart(7, "span");
            $r3$.ɵi18nAttributes(8, $_c1$);
            $r3$.ɵelementEnd();
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueB));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueC));
            $r3$.ɵi18nApply(3);
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueA));
            $r3$.ɵi18nApply(1);
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.valueE));
            $r3$.ɵi18nApply(8);
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(6, 0, ctx.valueD)));
            $r3$.ɵi18nApply(5);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle i18n attributes in nested templates', () => {
      const input = `
        <div>
          Some content
          <div *ngIf="visible">
            <div i18n>
              Some other content {{ valueA }}
              <div>
                More nested levels with bindings {{ valueB | uppercase }}
              </div>
            </div>
          </div>
        </div>
      `;

      const output = String.raw `
        const $_c0$ = [1, "ngIf"];
        const $MSG_EXTERNAL_7679414751795588050$ = goog.getMsg(" Some other content {$interpolation} {$startTagDiv} More nested levels with bindings {$interpolation_1} {$closeTagDiv}", {
          "interpolation": "\uFFFD0\uFFFD",
          "startTagDiv": "\uFFFD#3\uFFFD",
          "interpolation_1": "\uFFFD1\uFFFD",
          "closeTagDiv": "\uFFFD/#3\uFFFD"
        });
        …
        function MyComponent_div_Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵelementStart(1, "div");
            $r3$.ɵi18nStart(2, $MSG_EXTERNAL_7679414751795588050$);
            $r3$.ɵelement(3, "div");
            $r3$.ɵpipe(4, "uppercase");
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.valueA));
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(4, 0, $ctx_r0$.valueB)));
            $r3$.ɵi18nApply(2);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵtext(1, " Some content ");
            $r3$.ɵtemplate(2, MyComponent_div_Template_2, 5, 2, null, $_c0$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(2, "ngIf", $r3$.ɵbind(ctx.visible));
          }
        }
      `;

      verify(input, output);
    });

    it('should ignore i18n attributes on self-closing tags', () => {
      const input = `
        <img src="logo.png" i18n />
        <img src="logo.png" i18n *ngIf="visible" />
        <img src="logo.png" i18n *ngIf="visible" i18n-title title="App logo #{{ id }}" />
      `;

      const output = String.raw `
        const $_c0$ = ["src", "logo.png"];
        const $_c1$ = [1, "ngIf"];
        function MyComponent_img_Template_1(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelement(0, "img", $_c0$);
          }
        }
        const $MSG_EXTERNAL_2367729185105559721$ = goog.getMsg("App logo #{$interpolation}", {
          "interpolation": "\uFFFD0\uFFFD"
        });
        const $_c2$ = ["title", $MSG_EXTERNAL_2367729185105559721$];
        function MyComponent_img_Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "img", $_c0$);
            $r3$.ɵi18nAttributes(1, $_c2$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            const $ctx_r1$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r1$.id));
            $r3$.ɵi18nApply(1);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelement(0, "img", $_c0$);
            $r3$.ɵtemplate(1, MyComponent_img_Template_1, 1, 0, null, $_c1$);
            $r3$.ɵtemplate(2, MyComponent_img_Template_2, 2, 0, null, $_c1$);
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(1, "ngIf", $r3$.ɵbind(ctx.visible));
            $r3$.ɵelementProperty(2, "ngIf", $r3$.ɵbind(ctx.visible));
          }
        }
      `;

      verify(input, output);
    });

    it('should handle i18n context in nested templates', () => {
      const input = `
        <div i18n>
          Some content
          <div *ngIf="visible">
            Some other content {{ valueA }}
            <div>
              More nested levels with bindings {{ valueB | uppercase }}
              <div *ngIf="exists">
                Content inside sub-template {{ valueC }}
                <div>
                  Bottom level element {{ valueD }}
                </div>
              </div>
            </div>
          </div>
          <div *ngIf="!visible">
            Some other content {{ valueE + valueF }}
            <div>
              More nested levels with bindings {{ valueG | uppercase }}
            </div>
          </div>
        </div>
      `;

      const output = String.raw `
        const $_c0$ = [1, "ngIf"];
        function MyComponent_div_div_Template_4(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_EXTERNAL_1221890473527419724$, 2);
            $r3$.ɵelementStart(1, "div");
            $r3$.ɵelement(2, "div");
            $r3$.ɵelementEnd();
            $r3$.ɵi18nEnd();
          }
          if (rf & 2) {
            const $ctx_r2$ = $r3$.ɵnextContext(2);
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r2$.valueC));
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r2$.valueD));
            $r3$.ɵi18nApply(0);
          }
        }
        function MyComponent_div_Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_EXTERNAL_1221890473527419724$, 1);
            $r3$.ɵelementStart(1, "div");
            $r3$.ɵelementStart(2, "div");
            $r3$.ɵpipe(3, "uppercase");
            $r3$.ɵtemplate(4, MyComponent_div_div_Template_4, 3, 0, null, $_c1$);
            $r3$.ɵelementEnd();
            $r3$.ɵelementEnd();
            $r3$.ɵi18nEnd();
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵelementProperty(4, "ngIf", $r3$.ɵbind($ctx_r0$.exists));
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.valueA));
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(3, 0, $ctx_r0$.valueB)));
            $r3$.ɵi18nApply(0);
          }
        }
        const $MSG_EXTERNAL_1221890473527419724$$RAW$ = goog.getMsg(" Some content {$startTagDiv_2} Some other content {$interpolation} {$startTagDiv} More nested levels with bindings {$interpolation_1} {$startTagDiv_1} Content inside sub-template {$interpolation_2} {$startTagDiv} Bottom level element {$interpolation_3} {$closeTagDiv}{$closeTagDiv}{$closeTagDiv}{$closeTagDiv}{$startTagDiv_3} Some other content {$interpolation_4} {$startTagDiv} More nested levels with bindings {$interpolation_5} {$closeTagDiv}{$closeTagDiv}", {
          "startTagDiv_2": "\uFFFD*2:1\uFFFD\uFFFD#1:1\uFFFD",
          "closeTagDiv": "[\uFFFD/#2:2\uFFFD|\uFFFD/#1:2\uFFFD\uFFFD/*4:2\uFFFD|\uFFFD/#2:1\uFFFD|\uFFFD/#1:1\uFFFD\uFFFD/*2:1\uFFFD|\uFFFD/#2:3\uFFFD|\uFFFD/#1:3\uFFFD\uFFFD/*3:3\uFFFD]",
          "startTagDiv_3": "\uFFFD*3:3\uFFFD\uFFFD#1:3\uFFFD",
          "interpolation": "\uFFFD0:1\uFFFD",
          "startTagDiv": "[\uFFFD#2:1\uFFFD|\uFFFD#2:2\uFFFD|\uFFFD#2:3\uFFFD]",
          "interpolation_1": "\uFFFD1:1\uFFFD",
          "startTagDiv_1": "\uFFFD*4:2\uFFFD\uFFFD#1:2\uFFFD",
          "interpolation_2": "\uFFFD0:2\uFFFD",
          "interpolation_3": "\uFFFD1:2\uFFFD",
          "interpolation_4": "\uFFFD0:3\uFFFD",
          "interpolation_5": "\uFFFD1:3\uFFFD"
        });
        const $MSG_EXTERNAL_1221890473527419724$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_1221890473527419724$$RAW$);
        function MyComponent_div_Template_3(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_EXTERNAL_1221890473527419724$, 3);
            $r3$.ɵelementStart(1, "div");
            $r3$.ɵelement(2, "div");
            $r3$.ɵpipe(3, "uppercase");
            $r3$.ɵelementEnd();
            $r3$.ɵi18nEnd();
          }
          if (rf & 2) {
            const $ctx_r1$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind(($ctx_r1$.valueE + $ctx_r1$.valueF)));
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(3, 0, $ctx_r1$.valueG)));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_APP_SPEC_TS_0$);
            $r3$.ɵtemplate(2, MyComponent_div_Template_2, 5, 3, null, $_c1$);
            $r3$.ɵtemplate(3, MyComponent_div_Template_3, 4, 2, null, $_c1$);
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(2, "ngIf", $r3$.ɵbind(ctx.visible));
            $r3$.ɵelementProperty(3, "ngIf", $r3$.ɵbind(!ctx.visible));
          }
        }
      `;

      verify(input, output);
    });

    it('should handle i18n attribute with directives', () => {
      const input = `
        <div i18n *ngIf="visible">Some other content <span>{{ valueA }}</span></div>
      `;

      const output = String.raw `
        const $_c0$ = [1, "ngIf"];
        const $MSG_EXTERNAL_119975189388320493$ = goog.getMsg("Some other content {$startTagSpan}{$interpolation}{$closeTagSpan}", {
          "startTagSpan": "\uFFFD#2\uFFFD",
          "interpolation": "\uFFFD0\uFFFD",
          "closeTagSpan": "\uFFFD/#2\uFFFD"
        });
        …
        function MyComponent_div_Template_0(rf, ctx) {
          if (rf & 1) {
              $r3$.ɵelementStart(0, "div");
              $r3$.ɵi18nStart(1, $MSG_EXTERNAL_119975189388320493$);
              $r3$.ɵelement(2, "span");
              $r3$.ɵi18nEnd();
              $r3$.ɵelementEnd();
          }
          if (rf & 2) {
              const $ctx_r0$ = $r3$.ɵnextContext();
              $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.valueA));
              $r3$.ɵi18nApply(1);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵtemplate(0, MyComponent_div_Template_0, 3, 0, null, $_c0$);
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(0, "ngIf", $r3$.ɵbind(ctx.visible));
          }
        }
      `;

      verify(input, output);
    });
  });

  describe('self-closing i18n instructions', () => {
    it('should be generated with text-only content', () => {
      const input = `
        <div i18n>My i18n block #1</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_4890179241114413722$ = goog.getMsg("My i18n block #1");
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_4890179241114413722$);
            $r3$.ɵelementEnd();
          }
        }
      `;

      verify(input, output);
    });

    it('should be generated for ICU-only i18n blocks', () => {
      const input = `
        <div i18n>{age, select, 10 {ten} 20 {twenty} other {other}}</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_8806993169187953163$$RAW$ = goog.getMsg("{VAR_SELECT, select, 10 {ten} 20 {twenty} other {other}}");
        const $MSG_EXTERNAL_8806993169187953163$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_8806993169187953163$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_8806993169187953163$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.age));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should be generated within <ng-container> and <ng-template> blocks', () => {
      const input = `
        <ng-template i18n>My i18n block #1</ng-template>
        <ng-container i18n>My i18n block #2</ng-container>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_2413150872298537152$ = goog.getMsg("My i18n block #2");
        const $MSG_EXTERNAL_4890179241114413722$ = goog.getMsg("My i18n block #1");
        function Template_0(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18n(0, $MSG_EXTERNAL_4890179241114413722$);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵtemplate(0, Template_0, 1, 0);
            $r3$.ɵelementContainerStart(1);
            $r3$.ɵi18n(2, $MSG_EXTERNAL_2413150872298537152$);
            $r3$.ɵelementContainerEnd();
          }
        }
      `;

      verify(input, output);
    });
  });

  describe('ng-container and ng-template', () => {
    it('should handle single translation message using <ng-container>', () => {
      const input = `
        <ng-container i18n>Some content: {{ valueA | uppercase }}</ng-container>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_355394464191978948$ = goog.getMsg("Some content: {$interpolation}", {
          "interpolation": "\uFFFD0\uFFFD"
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementContainerStart(0);
            $r3$.ɵi18n(1, $MSG_EXTERNAL_355394464191978948$);
            $r3$.ɵpipe(2, "uppercase");
            $r3$.ɵelementContainerEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(2, 0, ctx.valueA)));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle single translation message using <ng-template>', () => {
      const input = `
        <ng-template i18n>Some content: {{ valueA | uppercase }}</ng-template>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_355394464191978948$ = goog.getMsg("Some content: {$interpolation}", {
          "interpolation": "\uFFFD0\uFFFD"
        });
        function Template_0(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18n(0, $MSG_EXTERNAL_355394464191978948$);
            $r3$.ɵpipe(1, "uppercase");
          } if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(1, 0, $ctx_r0$.valueA)));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵtemplate(0, Template_0, 2, 2);
          }
        }
      `;

      verify(input, output);
    });

    it('should be able to be child elements inside i18n block', () => {
      const input = `
        <div i18n>
          <ng-template>Template content: {{ valueA | uppercase }}</ng-template>
          <ng-container>Container content: {{ valueB | uppercase }}</ng-container>
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_702706566400598764$ = goog.getMsg("{$startTagNgTemplate}Template content: {$interpolation}{$closeTagNgTemplate}{$startTagNgContainer}Container content: {$interpolation_1}{$closeTagNgContainer}", {
          "startTagNgTemplate": "\uFFFD*2:1\uFFFD",
          "closeTagNgTemplate": "\uFFFD/*2:1\uFFFD",
          "startTagNgContainer": "\uFFFD#3\uFFFD",
          "interpolation_1": "\uFFFD0\uFFFD",
          "closeTagNgContainer": "\uFFFD/#3\uFFFD",
          "interpolation": "\uFFFD0:1\uFFFD"
        });
        function Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18n(0, $MSG_EXTERNAL_702706566400598764$, 1);
            $r3$.ɵpipe(1, "uppercase");
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(1, 0, $ctx_r0$.valueA)));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_EXTERNAL_702706566400598764$);
            $r3$.ɵtemplate(2, Template_2, 2, 2);
            $r3$.ɵelementContainerStart(3);
            $r3$.ɵpipe(4, "uppercase");
            $r3$.ɵelementContainerEnd();
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(4, 0, ctx.valueB)));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle ICUs outside of translatable sections', () => {
      const input = `
        <ng-template>{gender, select, male {male} female {female} other {other}}</ng-template>
        <ng-container>{age, select, 10 {ten} 20 {twenty} other {other}}</ng-container>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_8806993169187953163$$RAW$ = goog.getMsg("{VAR_SELECT, select, 10 {ten} 20 {twenty} other {other}}");
        const $MSG_EXTERNAL_8806993169187953163$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_8806993169187953163$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        const $MSG_EXTERNAL_7842238767399919809$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_EXTERNAL_7842238767399919809$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7842238767399919809$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        function Template_0(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18n(0, $MSG_EXTERNAL_7842238767399919809$);
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.gender));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵtemplate(0, Template_0, 1, 0);
            $r3$.ɵelementContainerStart(1);
            $r3$.ɵi18n(2, $MSG_EXTERNAL_8806993169187953163$);
            $r3$.ɵelementContainerEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.age));
            $r3$.ɵi18nApply(2);
          }
        }
      `;

      verify(input, output);
    });

    it('should correctly propagate i18n context through nested templates', () => {
      const input = `
        <div i18n>
          <ng-template>
            Template A: {{ valueA | uppercase }}
            <ng-template>
              Template B: {{ valueB }}
              <ng-template>
                Template C: {{ valueC }}
              </ng-template>
            </ng-template>
          </ng-template>
        </div>
      `;

      const output = String.raw `
        function Template_1(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18n(0, $MSG_EXTERNAL_2051477021417799640$, 3);
          }
          if (rf & 2) {
            const $ctx_r2$ = $r3$.ɵnextContext(3);
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r2$.valueC));
            $r3$.ɵi18nApply(0);
          }
        }
        function Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_EXTERNAL_2051477021417799640$, 2);
            $r3$.ɵtemplate(1, Template_1, 1, 0);
            $r3$.ɵi18nEnd();
          }
          if (rf & 2) {
            const $ctx_r1$ = $r3$.ɵnextContext(2);
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r1$.valueB));
            $r3$.ɵi18nApply(0);
          }
        }
        const $MSG_EXTERNAL_2051477021417799640$$RAW$ = goog.getMsg("{$startTagNgTemplate} Template A: {$interpolation} {$startTagNgTemplate} Template B: {$interpolation_1} {$startTagNgTemplate} Template C: {$interpolation_2} {$closeTagNgTemplate}{$closeTagNgTemplate}{$closeTagNgTemplate}", {
          "startTagNgTemplate": "[\uFFFD*2:1\uFFFD|\uFFFD*2:2\uFFFD|\uFFFD*1:3\uFFFD]",
          "closeTagNgTemplate": "[\uFFFD/*1:3\uFFFD|\uFFFD/*2:2\uFFFD|\uFFFD/*2:1\uFFFD]",
          "interpolation": "\uFFFD0:1\uFFFD",
          "interpolation_1": "\uFFFD0:2\uFFFD",
          "interpolation_2": "\uFFFD0:3\uFFFD"
        });
        const $MSG_EXTERNAL_2051477021417799640$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_2051477021417799640$$RAW$);
        function Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_EXTERNAL_2051477021417799640$, 1);
            $r3$.ɵpipe(1, "uppercase");
            $r3$.ɵtemplate(2, Template_2, 2, 0);
            $r3$.ɵi18nEnd();
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($r3$.ɵpipeBind1(1, 0, $ctx_r0$.valueA)));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_EXTERNAL_2051477021417799640$);
            $r3$.ɵtemplate(2, Template_2, 3, 2);
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
        }
      `;

      verify(input, output);
    });

    it('should work with ICUs', () => {
      const input = `
        <ng-container i18n>{gender, select, male {male} female {female} other {other}}</ng-container>
        <ng-template i18n>{age, select, 10 {ten} 20 {twenty} other {other}}</ng-template>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_7842238767399919809$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_EXTERNAL_7842238767399919809$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7842238767399919809$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        const $MSG_EXTERNAL_8806993169187953163$$RAW$ = goog.getMsg("{VAR_SELECT, select, 10 {ten} 20 {twenty} other {other}}");
        const $MSG_EXTERNAL_8806993169187953163$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_8806993169187953163$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        function Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18n(0, $MSG_EXTERNAL_8806993169187953163$);
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.age));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementContainerStart(0);
            $r3$.ɵi18n(1, $MSG_EXTERNAL_7842238767399919809$);
            $r3$.ɵelementContainerEnd();
            $r3$.ɵtemplate(2, Template_2, 1, 0);
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle self-closing tags as content', () => {
      const input = `
        <ng-container i18n>
          <img src="logo.png" title="Logo" /> is my logo #1
        </ng-container>
        <ng-template i18n>
          <img src="logo.png" title="Logo" /> is my logo #2
        </ng-template>
      `;

      const output = String.raw `
        const $_c0$ = ["src", "logo.png", "title", "Logo"];
        const $MSG_EXTERNAL_4891196282781544695$ = goog.getMsg("{$tagImg} is my logo #1 ", {
          "tagImg": "\uFFFD#2\uFFFD\uFFFD/#2\uFFFD"
        });
        const $MSG_EXTERNAL_461986953980355147$ = goog.getMsg("{$tagImg} is my logo #2 ", {
          "tagImg": "\uFFFD#1\uFFFD\uFFFD/#1\uFFFD"
        });
        function Template_3(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_EXTERNAL_461986953980355147$);
            $r3$.ɵelement(1, "img", $_c0$);
            $r3$.ɵi18nEnd();
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementContainerStart(0);
            $r3$.ɵi18nStart(1, $MSG_EXTERNAL_4891196282781544695$);
            $r3$.ɵelement(2, "img", $_c0$);
            $r3$.ɵi18nEnd();
            $r3$.ɵelementContainerEnd();
            $r3$.ɵtemplate(3, Template_3, 2, 0);
          }
        }
      `;

      verify(input, output);
    });
  });

  describe('whitespace preserving mode', () => {
    it('should keep inner content of i18n block as is', () => {
      const input = `
        <div i18n>
          Some text
          <span>Text inside span</span>
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_963542717423364282$ = goog.getMsg("\n          Some text\n          {$startTagSpan}Text inside span{$closeTagSpan}\n        ", {
          "startTagSpan": "\uFFFD#3\uFFFD",
          "closeTagSpan": "\uFFFD/#3\uFFFD"
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵtext(0, "\n        ");
            $r3$.ɵelementStart(1, "div");
            $r3$.ɵi18nStart(2, $MSG_EXTERNAL_963542717423364282$);
            $r3$.ɵelement(3, "span");
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
            $r3$.ɵtext(4, "\n      ");
          }
        }
      `;

      verify(input, output, {inputArgs: {preserveWhitespaces: true}});
    });
  });

  describe('icu logic', () => {
    it('should handle single icus', () => {
      const input = `
        <div i18n>{gender, select, male {male} female {female} other {other}}</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_7842238767399919809$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_EXTERNAL_7842238767399919809$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7842238767399919809$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_7842238767399919809$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should properly escape quotes in content', () => {
      const input = `
        <div i18n>{gender, select, single {'single quotes'} double {"double quotes"} other {other}}</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_4166854826696768832$$RAW$ = goog.getMsg("{VAR_SELECT, select, single {'single quotes'} double {\"double quotes\"} other {other}}");
        const $MSG_EXTERNAL_4166854826696768832$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_4166854826696768832$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
      `;

      verify(input, output);
    });

    it('should generate i18n instructions for icus generated outside of i18n blocks', () => {
      const input = `
        <div>{gender, select, male {male} female {female} other {other}}</div>
        <div *ngIf="visible" title="icu only">
          {age, select, 10 {ten} 20 {twenty} other {other}}
        </div>
        <div *ngIf="available" title="icu and text">
          You have {count, select, 0 {no emails} 1 {one email} other {{{count}} emails}}.
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_7842238767399919809$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_EXTERNAL_7842238767399919809$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7842238767399919809$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        const $_c0$ = [1, "ngIf"];
        const $_c1$ = ["title", "icu only"];
        const $MSG_EXTERNAL_8806993169187953163$$RAW$ = goog.getMsg("{VAR_SELECT, select, 10 {ten} 20 {twenty} other {other}}");
        const $MSG_EXTERNAL_8806993169187953163$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_8806993169187953163$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        function MyComponent_div_Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div", $_c1$);
            $r3$.ɵi18n(1, $MSG_EXTERNAL_8806993169187953163$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.age));
            $r3$.ɵi18nApply(1);
          }
        }
        const $_c2$ = ["title", "icu and text"];
        const $MSG_EXTERNAL_1922743304863699161$$RAW$ = goog.getMsg("{VAR_SELECT, select, 0 {no emails} 1 {one email} other {{$interpolation} emails}}", {
          "interpolation": "\uFFFD1\uFFFD"
        });
        const $MSG_EXTERNAL_1922743304863699161$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_1922743304863699161$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        function MyComponent_div_Template_3(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div", $_c2$);
            $r3$.ɵtext(1, " You have ");
            $r3$.ɵi18n(2, $MSG_EXTERNAL_1922743304863699161$);
            $r3$.ɵtext(3, ". ");
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            const $ctx_r1$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r1$.count));
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r1$.count));
            $r3$.ɵi18nApply(2);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_7842238767399919809$);
            $r3$.ɵelementEnd();
            $r3$.ɵtemplate(2, MyComponent_div_Template_2, 2, 0, null, $_c0$);
            $r3$.ɵtemplate(3, MyComponent_div_Template_3, 4, 0, null, $_c0$);
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nApply(1);
            $r3$.ɵelementProperty(2, "ngIf", $r3$.ɵbind(ctx.visible));
            $r3$.ɵelementProperty(3, "ngIf", $r3$.ɵbind(ctx.available));
          }
        }
      `;

      verify(input, output);
    });

    it('should handle icus with html', () => {
      const input = `
        <div i18n>
          {gender, select, male {male - <b>male</b>} female {female <b>female</b>} other {<div class="other"><i>other</i></div>}}
          <b>Other content</b>
          <div class="other"><i>Another content</i></div>
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_2417296354340576868$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male - {$startBoldText}male{$closeBoldText}} female {female {$startBoldText}female{$closeBoldText}} other {{$startTagDiv}{$startItalicText}other{$closeItalicText}{$closeTagDiv}}}", {
          "startBoldText": "<b>",
          "closeBoldText": "</b>",
          "startItalicText": "<i>",
          "closeItalicText": "</i>",
          "startTagDiv": "<div class=\"other\">",
          "closeTagDiv": "</div>"
        });
        const $MSG_EXTERNAL_2417296354340576868$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_2417296354340576868$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        const $_c0$ = ["other", 1, "other", true];
        const $MSG_EXTERNAL_5791551881115084301$ = goog.getMsg("{$icu}{$startBoldText}Other content{$closeBoldText}{$startTagDiv}{$startItalicText}Another content{$closeItalicText}{$closeTagDiv}", {
          "startBoldText": "\uFFFD#2\uFFFD",
          "closeBoldText": "\uFFFD/#2\uFFFD",
          "startTagDiv": "\uFFFD#3\uFFFD",
          "startItalicText": "\uFFFD#4\uFFFD",
          "closeItalicText": "\uFFFD/#4\uFFFD",
          "closeTagDiv": "\uFFFD/#3\uFFFD",
          "icu": $MSG_APP_SPEC_TS_1$
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_EXTERNAL_5791551881115084301$);
            $r3$.ɵelement(2, "b");
            $r3$.ɵelementStart(3, "div");
            $r3$.ɵelementStyling($_c0$);
            $r3$.ɵelement(4, "i");
            $r3$.ɵelementEnd();
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle icus with expressions', () => {
      const input = `
        <div i18n>{gender, select, male {male of age: {{ ageA + ageB + ageC }}} female {female} other {other}}</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_6879461626778511059$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male of age: {$interpolation}} female {female} other {other}}", {
          "interpolation": "\uFFFD1\uFFFD"
        });
        const $MSG_EXTERNAL_6879461626778511059$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_6879461626778511059$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_6879461626778511059$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nExp($r3$.ɵbind(((ctx.ageA + ctx.ageB) + ctx.ageC)));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle multiple icus in one block', () => {
      const input = `
        <div i18n>
          {gender, select, male {male} female {female} other {other}}
          {age, select, 10 {ten} 20 {twenty} 30 {thirty} other {other}}
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_7842238767399919809$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_EXTERNAL_7842238767399919809$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7842238767399919809$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        const $MSG_EXTERNAL_7068143081688428291$$RAW$ = goog.getMsg("{VAR_SELECT, select, 10 {ten} 20 {twenty} 30 {thirty} other {other}}");
        const $MSG_EXTERNAL_7068143081688428291$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7068143081688428291$$RAW$, {
          "VAR_SELECT": "\uFFFD1\uFFFD"
        });
        const $MSG_EXTERNAL_2967249209167308918$ = goog.getMsg("{$icu}{$icu_1}", {
          "icu": $MSG_EXTERNAL_7842238767399919809$,
          "icu_1": $MSG_EXTERNAL_7068143081688428291$
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_2967249209167308918$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.age));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle multiple icus that share same placeholder', () => {
      const input = `
        <div i18n>
          {gender, select, male {male} female {female} other {other}}
          <div>
            {gender, select, male {male} female {female} other {other}}
          </div>
          <div *ngIf="visible">
            {gender, select, male {male} female {female} other {other}}
          </div>
        </div>
      `;

      const output = String.raw `
        const $MSG_APP_SPEC_TS_1$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_APP_SPEC_TS_1$ = $r3$.ɵi18nPostprocess($MSG_APP_SPEC_TS_1$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        const $MSG_APP_SPEC_TS_2$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_APP_SPEC_TS_2$ = $r3$.ɵi18nPostprocess($MSG_APP_SPEC_TS_2$$RAW$, {
          "VAR_SELECT": "\uFFFD1\uFFFD"
        });
        const $_c3$ = [1, "ngIf"];
        const $MSG_APP_SPEC_TS__4$$RAW$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_APP_SPEC_TS__4$$RAW$ = $r3$.ɵi18nPostprocess($MSG_APP_SPEC_TS__4$$RAW$$RAW$, {
          "VAR_SELECT": "\uFFFD0:1\uFFFD"
        });
        const $MSG_APP_SPEC_TS_0$$RAW$$RAW$ = goog.getMsg("{$icu}{$startTagDiv}{$icu}{$closeTagDiv}{$startTagDiv_1}{$icu}{$closeTagDiv}", {
          "startTagDiv": "\uFFFD#2\uFFFD",
          "closeTagDiv": "[\uFFFD/#2\uFFFD|\uFFFD/#1:1\uFFFD\uFFFD/*3:1\uFFFD]",
          "startTagDiv_1": "\uFFFD*3:1\uFFFD\uFFFD#1:1\uFFFD",
          "icu": "\uFFFDI18N_EXP_ICU\uFFFD"
        });
        const $MSG_APP_SPEC_TS_0$$RAW$ = $r3$.ɵi18nPostprocess($MSG_APP_SPEC_TS_0$$RAW$$RAW$, {
          "ICU": [$MSG_APP_SPEC_TS_1$, $MSG_APP_SPEC_TS_2$, $MSG_APP_SPEC_TS__4$]
        });
        function MyComponent_div_Template_3(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_APP_SPEC_TS_0$, 1);
            $r3$.ɵelement(1, "div");
            $r3$.ɵi18nEnd();
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.gender));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_APP_SPEC_TS_0$);
            $r3$.ɵelement(2, "div");
            $r3$.ɵtemplate(3, MyComponent_div_Template_3, 2, 0, null, $_c3$);
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(3, "ngIf", $r3$.ɵbind(ctx.visible));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      // TODO(akushnir): this use-case is currently supported with
      // file-based prefix for translation const names. Translation statements
      // caching is required to support this use-case (FW-635) with id-based consts.
      verify(input, output, {skipIdBasedCheck: true});
    });

    it('should handle nested icus', () => {
      const input = `
        <div i18n>
          {gender, select,
            male {male of age: {age, select, 10 {ten} 20 {twenty} 30 {thirty} other {other}}}
            female {female}
            other {other}
          }
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_3052001905251380936$$RAW$ = goog.getMsg("{VAR_SELECT_1, select, male {male of age: {VAR_SELECT, select, 10 {ten} 20 {twenty} 30 {thirty} other {other}}} female {female} other {other}}");
        const $MSG_EXTERNAL_3052001905251380936$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_3052001905251380936$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD",
          "VAR_SELECT_1": "\uFFFD1\uFFFD"
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_3052001905251380936$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.age));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      const exceptions = {
        '3052001905251380936': 'Wrapper message generated by "ng xi18n" around ICU: "  {$ICU}  "'
      };
      verify(input, output, {exceptions, verbose: true});
    });

    it('should handle icus in different contexts', () => {
      const input = `
        <div i18n>
          {gender, select, male {male} female {female} other {other}}
          <span *ngIf="ageVisible">
            {age, select, 10 {ten} 20 {twenty} 30 {thirty} other {other}}
          </span>
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_7842238767399919809$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male} female {female} other {other}}");
        const $MSG_EXTERNAL_7842238767399919809$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7842238767399919809$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        const $_c0$ = [1, "ngIf"];
        const $MSG_EXTERNAL_7068143081688428291$$RAW$ = goog.getMsg("{VAR_SELECT, select, 10 {ten} 20 {twenty} 30 {thirty} other {other}}");
        const $MSG_EXTERNAL_7068143081688428291$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7068143081688428291$$RAW$, {
          "VAR_SELECT": "\uFFFD0:1\uFFFD"
        });
        const $MSG_EXTERNAL_1194472282609532229$ = goog.getMsg("{$icu}{$startTagSpan}{$icu_1}{$closeTagSpan}", {
          "startTagSpan": "\uFFFD*2:1\uFFFD\uFFFD#1:1\uFFFD",
          "closeTagSpan": "\uFFFD/#1:1\uFFFD\uFFFD/*2:1\uFFFD",
          "icu": $MSG_EXTERNAL_7842238767399919809$,
          "icu_1": $MSG_EXTERNAL_7068143081688428291$
        });
        function MyComponent_span_Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_EXTERNAL_1194472282609532229$, 1);
            $r3$.ɵelement(1, "span");
            $r3$.ɵi18nEnd();
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.age));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_EXTERNAL_1194472282609532229$);
            $r3$.ɵtemplate(2, MyComponent_span_Template_2, 2, 0, null, $_c2$);
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(2, "ngIf", $r3$.ɵbind(ctx.ageVisible));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle icus with interpolations', () => {
      const input = `
        <div i18n>
          {gender, select, male {male {{ weight }}} female {female {{ height }}} other {other}}
          <span *ngIf="ageVisible">
            {age, select, 10 {ten} 20 {twenty} 30 {thirty} other {other: {{ otherAge }}}}
          </span>
        </div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_7825031864601787094$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male {$interpolation}} female {female {$interpolation_1}} other {other}}", {
          "interpolation": "\uFFFD1\uFFFD",
          "interpolation_1": "\uFFFD2\uFFFD"
        });
        const $MSG_EXTERNAL_7825031864601787094$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_7825031864601787094$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        const $_c0$ = [1, "ngIf"];
        const $MSG_EXTERNAL_2310343208266678305$$RAW$ = goog.getMsg("{VAR_SELECT, select, 10 {ten} 20 {twenty} 30 {thirty} other {other: {$interpolation}}}", {
          "interpolation": "\uFFFD1:1\uFFFD"
        });
        const $MSG_EXTERNAL_2310343208266678305$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_2310343208266678305$$RAW$, {
          "VAR_SELECT": "\uFFFD0:1\uFFFD"
        });
        const $MSG_EXTERNAL_7186042105600518133$ = goog.getMsg("{$icu}{$startTagSpan}{$icu_1}{$closeTagSpan}", {
          "startTagSpan": "\uFFFD*2:1\uFFFD\uFFFD#1:1\uFFFD",
          "closeTagSpan": "\uFFFD/#1:1\uFFFD\uFFFD/*2:1\uFFFD",
          "icu": $MSG_EXTERNAL_7825031864601787094$,
          "icu_1": $MSG_EXTERNAL_2310343208266678305$
        });
        function MyComponent_span_Template_2(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵi18nStart(0, $MSG_EXTERNAL_7186042105600518133$, 1);
            $r3$.ɵelement(1, "span");
            $r3$.ɵi18nEnd();
          }
          if (rf & 2) {
            const $ctx_r0$ = $r3$.ɵnextContext();
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.age));
            $r3$.ɵi18nExp($r3$.ɵbind($ctx_r0$.otherAge));
            $r3$.ɵi18nApply(0);
          }
        }
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18nStart(1, $MSG_EXTERNAL_7186042105600518133$);
            $r3$.ɵtemplate(2, MyComponent_span_Template_2, 2, 0, null, $_c0$);
            $r3$.ɵi18nEnd();
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵelementProperty(2, "ngIf", $r3$.ɵbind(ctx.ageVisible));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.weight));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.height));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });

    it('should handle icus with named interpolations', () => {
      const input = `
        <div i18n>{
          gender,
          select,
            male {male {{ weight // i18n(ph="PH_A") }}}
            female {female {{ height // i18n(ph="PH_B") }}}
            other {other {{ age // i18n(ph="PH_C") }}}
        }</div>
      `;

      const output = String.raw `
        const $MSG_EXTERNAL_4853189513362404940$$RAW$ = goog.getMsg("{VAR_SELECT, select, male {male {$phA}} female {female {$phB}} other {other {$phC}}}", {
          "phA": "\uFFFD1\uFFFD",
          "phB": "\uFFFD2\uFFFD",
          "phC": "\uFFFD3\uFFFD"
        });
        const $MSG_EXTERNAL_4853189513362404940$ = $r3$.ɵi18nPostprocess($MSG_EXTERNAL_4853189513362404940$$RAW$, {
          "VAR_SELECT": "\uFFFD0\uFFFD"
        });
        …
        template: function MyComponent_Template(rf, ctx) {
          if (rf & 1) {
            $r3$.ɵelementStart(0, "div");
            $r3$.ɵi18n(1, $MSG_EXTERNAL_4853189513362404940$);
            $r3$.ɵelementEnd();
          }
          if (rf & 2) {
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.gender));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.weight));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.height));
            $r3$.ɵi18nExp($r3$.ɵbind(ctx.age));
            $r3$.ɵi18nApply(1);
          }
        }
      `;

      verify(input, output);
    });
  });

  describe('errors', () => {
    it('should throw on nested i18n sections', () => {
      const files = getAppFilesWithTemplate(`
        <div i18n><div i18n>Some content</div></div>
      `);
      expect(() => compile(files, angularFiles))
          .toThrowError(
              'Could not mark an element as translatable inside of a translatable section');
    });

  });
});