angular-docs-cn/packages/compiler-cli/test/compliance/r3_view_compiler_providers_spec.ts

/**
 * @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 {setup} from '@angular/compiler/test/aot/test_util';
import {compile, expectEmit} from './mock_compile';

describe('compiler compliance: providers', () => {
  const angularFiles = setup({
    compileAngular: false,
    compileFakeCore: true,
    compileAnimations: false,
  });

  it('should emit the ProvidersFeature feature when providers and viewProviders', () => {
    const files = {
      app: {
        'spec.ts': `
              import {Component, NgModule} from '@angular/core';

              abstract class Greeter { abstract greet(): string; }

              class GreeterEN implements Greeter {
                greet() { return 'Hi'; }
              }

              @Component({
                selector: 'my-component',
                template: '<div></div>',
                providers: [GreeterEN, {provide: Greeter, useClass: GreeterEN}],
                viewProviders: [GreeterEN]
              })
              export class MyComponent {
              }

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

    const result = compile(files, angularFiles);
    expectEmit(
        result.source,
        'features: [i0.ɵɵProvidersFeature([GreeterEN, {provide: Greeter, useClass: GreeterEN}], [GreeterEN])],',
        'Incorrect features');
  });

  it('should emit the ProvidersFeature feature when providers only', () => {
    const files = {
      app: {
        'spec.ts': `
              import {Component, NgModule} from '@angular/core';

              abstract class Greeter { abstract greet(): string; }

              class GreeterEN implements Greeter {
                greet() { return 'Hi'; }
              }

              @Component({
                selector: 'my-component',
                template: '<div></div>',
                providers: [GreeterEN, {provide: Greeter, useClass: GreeterEN}]
              })
              export class MyComponent {
              }

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

    const result = compile(files, angularFiles);
    expectEmit(
        result.source,
        'features: [i0.ɵɵProvidersFeature([GreeterEN, {provide: Greeter, useClass: GreeterEN}])],',
        'Incorrect features');
  });

  it('should emit the ProvidersFeature feature when viewProviders only', () => {
    const files = {
      app: {
        'spec.ts': `
              import {Component, NgModule} from '@angular/core';

              abstract class Greeter { abstract greet(): string; }

              class GreeterEN implements Greeter {
                greet() { return 'Hi'; }
              }

              @Component({
                selector: 'my-component',
                template: '<div></div>',
                viewProviders: [GreeterEN]
              })
              export class MyComponent {
              }

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

    const result = compile(files, angularFiles);
    expectEmit(
        result.source, 'features: [i0.ɵɵProvidersFeature([], [GreeterEN])],', 'Incorrect features');
  });

  it('should not emit the ProvidersFeature feature when no providers', () => {
    const files = {
      app: {
        'spec.ts': `
              import {Component, NgModule} from '@angular/core';

              abstract class Greeter { abstract greet(): string; }

              class GreeterEN implements Greeter {
                greet() { return 'Hi'; }
              }

              @Component({
                selector: 'my-component',
                template: '<div></div>'
              })
              export class MyComponent {
              }

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

    const result = compile(files, angularFiles);
    expectEmit(
        result.source, `
        export class MyComponent {
        }
        MyComponent.ɵfac = function MyComponent_Factory(t) { return new (t || MyComponent)(); };
        MyComponent.ɵcmp = i0.ɵɵdefineComponent({
          type: MyComponent,
          selectors: [["my-component"]],
          decls: 1,
          vars: 0,
          template: function MyComponent_Template(rf, ctx) {
            if (rf & 1) {
              i0.ɵɵelement(0, "div");
            }
          },
          encapsulation: 2
        });`,
        'Incorrect features');
  });
});