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angular-cn/packages/compiler-cli/test/ngtsc/xi18n_spec.ts
Alex Rickabaugh e83d7cb2d3 refactor(compiler-cli): support xi18n in ngtsc (#42485) 
xi18n is the operation of extracting i18n messages from templates in the
compilation. Previously, only View Engine was able to perform xi18n. This
commit implements xi18n in the Ivy compiler, and a copy of the View Engine
test for Ivy verifies that the results are identical.

PR Close #42485
2021-06-21 16:50:28 +00:00

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/**
* @license
* Copyright Google LLC 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 {runInEachFileSystem} from '@angular/compiler-cli/src/ngtsc/file_system/testing';
import {loadStandardTestFiles} from '@angular/compiler-cli/src/ngtsc/testing';
import {platform} from 'os';
import {NgtscTestEnvironment} from './env';
const testFiles = loadStandardTestFiles({fakeCore: true, fakeCommon: true});
runInEachFileSystem(os => {
let env!: NgtscTestEnvironment;
if (os === 'Windows' || platform() === 'win32') {
// xi18n tests are skipped on Windows as the paths in the expected message files are platform-
// sensitive. These tests will be deleted when xi18n is removed, so it's not a major priority
// to make them work with Windows.
return;
}
describe('ngtsc xi18n', () => {
beforeEach(() => {
env = NgtscTestEnvironment.setup(testFiles);
env.tsconfig();
writeTestCode(env);
});
it('should extract xmb', () => {
env.driveXi18n('xmb', 'messages.xmb');
expect(env.getContents('messages.xmb')).toEqual(EXPECTED_XMB);
});
it('should extract xlf', () => {
// Note that only in XLF mode do we pass a locale into the extraction.
env.driveXi18n('xlf', 'messages.xlf', 'fr');
expect(env.getContents('messages.xlf')).toEqual(EXPECTED_XLIFF);
});
it('should extract xlf', () => {
env.driveXi18n('xlf2', 'messages.xliff2.xlf');
expect(env.getContents('messages.xliff2.xlf')).toEqual(EXPECTED_XLIFF2);
});
it('should not emit js', () => {
env.driveXi18n('xlf2', 'messages.xliff2.xlf');
env.assertDoesNotExist('src/module.js');
});
});
});
const EXPECTED_XMB = `<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE messagebundle [
<!ELEMENT messagebundle (msg)*>
<!ATTLIST messagebundle class CDATA #IMPLIED>
<!ELEMENT msg (#PCDATA|ph|source)*>
<!ATTLIST msg id CDATA #IMPLIED>
<!ATTLIST msg seq CDATA #IMPLIED>
<!ATTLIST msg name CDATA #IMPLIED>
<!ATTLIST msg desc CDATA #IMPLIED>
<!ATTLIST msg meaning CDATA #IMPLIED>
<!ATTLIST msg obsolete (obsolete) #IMPLIED>
<!ATTLIST msg xml:space (default|preserve) "default">
<!ATTLIST msg is_hidden CDATA #IMPLIED>
<!ELEMENT source (#PCDATA)>
<!ELEMENT ph (#PCDATA|ex)*>
<!ATTLIST ph name CDATA #REQUIRED>
<!ELEMENT ex (#PCDATA)>
]>
<messagebundle>
<msg id="8136548302122759730" desc="desc" meaning="meaning"><source>src/basic.html:1</source><source>src/comp2.ts:1</source><source>src/basic.html:1</source>translate me</msg>
<msg id="9038505069473852515"><source>src/basic.html:3,4</source><source>src/comp2.ts:3,4</source><source>src/comp2.ts:2,3</source><source>src/basic.html:3,4</source>
Welcome</msg>
<msg id="5611534349548281834" desc="with ICU"><source>src/icu.html:1,3</source><source>src/icu.html:5</source>{VAR_PLURAL, plural, =1 {book} other {books} }</msg>
<msg id="5811701742971715242" desc="with ICU and other things"><source>src/icu.html:4,6</source>
foo <ph name="ICU"><ex>{ count, plural, =1 {...} other {...}}</ex>{ count, plural, =1 {...} other {...}}</ph>
</msg>
<msg id="7254052530614200029" desc="with placeholders"><source>src/placeholders.html:1,3</source>Name: <ph name="START_BOLD_TEXT"><ex>&lt;b&gt;</ex>&lt;b&gt;</ph><ph name="NAME"><ex>{{
name // i18n(ph=&quot;name&quot;)
}}</ex>{{
name // i18n(ph=&quot;name&quot;)
}}</ph><ph name="CLOSE_BOLD_TEXT"><ex>&lt;/b&gt;</ex>&lt;/b&gt;</ph></msg>
</messagebundle>
`;
const EXPECTED_XLIFF = `<?xml version="1.0" encoding="UTF-8" ?>
<xliff version="1.2" xmlns="urn:oasis:names:tc:xliff:document:1.2">
<file source-language="fr" datatype="plaintext" original="ng2.template">
<body>
<trans-unit id="76e1eccb1b772fa9f294ef9c146ea6d0efa8a2d4" datatype="html">
<source>translate me</source>
<context-group purpose="location">
<context context-type="sourcefile">src/basic.html</context>
<context context-type="linenumber">1</context>
</context-group>
<context-group purpose="location">
<context context-type="sourcefile">src/comp2.ts</context>
<context context-type="linenumber">1</context>
</context-group>
<context-group purpose="location">
<context context-type="sourcefile">src/basic.html</context>
<context context-type="linenumber">1</context>
</context-group>
<note priority="1" from="description">desc</note>
<note priority="1" from="meaning">meaning</note>
</trans-unit>
<trans-unit id="085a5ecc40cc87451d216725b2befd50866de18a" datatype="html">
<source>
Welcome</source>
<context-group purpose="location">
<context context-type="sourcefile">src/basic.html</context>
<context context-type="linenumber">3</context>
</context-group>
<context-group purpose="location">
<context context-type="sourcefile">src/comp2.ts</context>
<context context-type="linenumber">3</context>
</context-group>
<context-group purpose="location">
<context context-type="sourcefile">src/comp2.ts</context>
<context context-type="linenumber">2</context>
</context-group>
<context-group purpose="location">
<context context-type="sourcefile">src/basic.html</context>
<context context-type="linenumber">3</context>
</context-group>
</trans-unit>
<trans-unit id="83937c05b1216e7f4c02a85454260e28fd72d1e3" datatype="html">
<source>{VAR_PLURAL, plural, =1 {book} other {books} }</source>
<context-group purpose="location">
<context context-type="sourcefile">src/icu.html</context>
<context context-type="linenumber">1</context>
</context-group>
<note priority="1" from="description">with ICU</note>
</trans-unit>
<trans-unit id="540c5f481129419ef21017f396b6c2d0869ca4d2" datatype="html">
<source>
foo <x id="ICU" equiv-text="{ count, plural, =1 {...} other {...}}"/>
</source>
<context-group purpose="location">
<context context-type="sourcefile">src/icu.html</context>
<context context-type="linenumber">4</context>
</context-group>
<note priority="1" from="description">with ICU and other things</note>
</trans-unit>
<trans-unit id="ca7678090fddd04441d63b1218177af65f23342d" datatype="html">
<source>{VAR_PLURAL, plural, =1 {book} other {books} }</source>
<context-group purpose="location">
<context context-type="sourcefile">src/icu.html</context>
<context context-type="linenumber">5</context>
</context-group>
</trans-unit>
<trans-unit id="9311399c1ca7c75f771d77acb129e50581c6ec1f" datatype="html">
<source>Name: <x id="START_BOLD_TEXT" ctype="x-b" equiv-text="&lt;b&gt;"/><x id="NAME" equiv-text="{{
name // i18n(ph=&quot;name&quot;)
}}"/><x id="CLOSE_BOLD_TEXT" ctype="x-b" equiv-text="&lt;/b&gt;"/></source>
<context-group purpose="location">
<context context-type="sourcefile">src/placeholders.html</context>
<context context-type="linenumber">1</context>
</context-group>
<note priority="1" from="description">with placeholders</note>
</trans-unit>
</body>
</file>
</xliff>
`;
const EXPECTED_XLIFF2 = `<?xml version="1.0" encoding="UTF-8" ?>
<xliff version="2.0" xmlns="urn:oasis:names:tc:xliff:document:2.0" srcLang="en">
<file original="ng.template" id="ngi18n">
<unit id="8136548302122759730">
<notes>
<note category="description">desc</note>
<note category="meaning">meaning</note>
<note category="location">src/basic.html:1</note>
<note category="location">src/comp2.ts:1</note>
<note category="location">src/basic.html:1</note>
</notes>
<segment>
<source>translate me</source>
</segment>
</unit>
<unit id="9038505069473852515">
<notes>
<note category="location">src/basic.html:3,4</note>
<note category="location">src/comp2.ts:3,4</note>
<note category="location">src/comp2.ts:2,3</note>
<note category="location">src/basic.html:3,4</note>
</notes>
<segment>
<source>
Welcome</source>
</segment>
</unit>
<unit id="5611534349548281834">
<notes>
<note category="description">with ICU</note>
<note category="location">src/icu.html:1,3</note>
<note category="location">src/icu.html:5</note>
</notes>
<segment>
<source>{VAR_PLURAL, plural, =1 {book} other {books} }</source>
</segment>
</unit>
<unit id="5811701742971715242">
<notes>
<note category="description">with ICU and other things</note>
<note category="location">src/icu.html:4,6</note>
</notes>
<segment>
<source>
foo <ph id="0" equiv="ICU" disp="{ count, plural, =1 {...} other {...}}"/>
</source>
</segment>
</unit>
<unit id="7254052530614200029">
<notes>
<note category="description">with placeholders</note>
<note category="location">src/placeholders.html:1,3</note>
</notes>
<segment>
<source>Name: <pc id="0" equivStart="START_BOLD_TEXT" equivEnd="CLOSE_BOLD_TEXT" type="fmt" dispStart="&lt;b&gt;" dispEnd="&lt;/b&gt;"><ph id="1" equiv="NAME" disp="{{
name // i18n(ph=&quot;name&quot;)
}}"/></pc></source>
</segment>
</unit>
</file>
</xliff>
`;
/**
* Note: the indentation here is load-bearing.
*/
function writeTestCode(env: NgtscTestEnvironment): void {
const welcomeMessage = `
<!--i18n-->
Welcome<!--/i18n-->
`;
env.write('src/basic.html', `<div title="translate me" i18n-title="meaning|desc"></div>
<p id="welcomeMessage">${welcomeMessage}</p>`);
env.write('src/comp1.ts', `
import {Component} from '@angular/core';
@Component({
selector: 'basic',
templateUrl: './basic.html',
})
export class BasicCmp1 {}`);
env.write('src/comp2.ts', `
import {Component} from '@angular/core';
@Component({
selector: 'basic2',
template: \`<div title="translate me" i18n-title="meaning|desc"></div>
<p id="welcomeMessage">${welcomeMessage}</p>\`,
})
export class BasicCmp2 {}
@Component({
selector: 'basic4',
template: \`<p id="welcomeMessage">${welcomeMessage}</p>\`,
})
export class BasicCmp4 {}`);
env.write('src/comp3.ts', `
import {Component} from '@angular/core';
@Component({
selector: 'basic3',
templateUrl: './basic.html',
})
export class BasicCmp3 {}`);
env.write('src/placeholders.html', `<div i18n="with placeholders">Name: <b>{{
name // i18n(ph="name")
}}</b></div>`);
env.write('src/placeholder_cmp.ts', `
import {Component} from '@angular/core';
@Component({
selector: 'placeholders',
templateUrl: './placeholders.html',
})
export class PlaceholderCmp { name = 'whatever'; }`);
env.write('src/icu.html', `<div i18n="with ICU">{
count, plural, =1 {book} other {books}
}</div>
<div i18n="with ICU and other things">
foo { count, plural, =1 {book} other {books} }
</div>`);
env.write('src/icu_cmp.ts', `
import {Component} from '@angular/core';
@Component({
selector: 'icu',
templateUrl: './icu.html',
})
export class IcuCmp { count = 3; }`);
env.write('src/module.ts', `
import {NgModule} from '@angular/core';
import {CommonModule} from '@angular/common';
import {BasicCmp1} from './comp1';
import {BasicCmp2, BasicCmp4} from './comp2';
import {BasicCmp3} from './comp3';
import {PlaceholderCmp} from './placeholder_cmp';
import {IcuCmp} from './icu_cmp';
@NgModule({
declarations: [
BasicCmp1,
BasicCmp2,
BasicCmp3,
BasicCmp4,
PlaceholderCmp,
IcuCmp,
],
imports: [CommonModule],
})
export class I18nModule {}
`);
}
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