angular-cn/packages/platform-browser/test/testing_public_spec.ts

910 lines
32 KiB
TypeScript

/**
* @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 {CompilerConfig, ResourceLoader} from '@angular/compiler';
import {CUSTOM_ELEMENTS_SCHEMA, Compiler, Component, Directive, Inject, Injectable, Injector, Input, NgModule, Optional, Pipe, SkipSelf, ɵstringify as stringify} from '@angular/core';
import {TestBed, async, fakeAsync, getTestBed, inject, tick, withModule} from '@angular/core/testing';
import {expect} from '@angular/platform-browser/testing/src/matchers';
// Services, and components for the tests.
@Component({selector: 'child-comp', template: `<span>Original {{childBinding}}</span>`})
@Injectable()
class ChildComp {
childBinding: string;
constructor() { this.childBinding = 'Child'; }
}
@Component({selector: 'child-comp', template: `<span>Mock</span>`})
@Injectable()
class MockChildComp {
}
@Component({
selector: 'parent-comp',
template: `Parent(<child-comp></child-comp>)`,
})
@Injectable()
class ParentComp {
}
@Component({selector: 'my-if-comp', template: `MyIf(<span *ngIf="showMore">More</span>)`})
@Injectable()
class MyIfComp {
showMore: boolean = false;
}
@Component({selector: 'child-child-comp', template: `<span>ChildChild</span>`})
@Injectable()
class ChildChildComp {
}
@Component({
selector: 'child-comp',
template: `<span>Original {{childBinding}}(<child-child-comp></child-child-comp>)</span>`,
})
@Injectable()
class ChildWithChildComp {
childBinding: string;
constructor() { this.childBinding = 'Child'; }
}
class FancyService {
value: string = 'real value';
getAsyncValue() { return Promise.resolve('async value'); }
getTimeoutValue() {
return new Promise<string>((resolve, reject) => setTimeout(() => resolve('timeout value'), 10));
}
}
class MockFancyService extends FancyService {
value: string = 'mocked out value';
}
@Component({
selector: 'my-service-comp',
providers: [FancyService],
template: `injected value: {{fancyService.value}}`
})
class TestProvidersComp {
constructor(private fancyService: FancyService) {}
}
@Component({
selector: 'my-service-comp',
viewProviders: [FancyService],
template: `injected value: {{fancyService.value}}`
})
class TestViewProvidersComp {
constructor(private fancyService: FancyService) {}
}
@Directive({selector: '[someDir]', host: {'[title]': 'someDir'}})
class SomeDirective {
@Input()
someDir: string;
}
@Pipe({name: 'somePipe'})
class SomePipe {
transform(value: string) { return `transformed ${value}`; }
}
@Component({selector: 'comp', template: `<div [someDir]="'someValue' | somePipe"></div>`})
class CompUsingModuleDirectiveAndPipe {
}
@NgModule()
class SomeLibModule {
}
@Component(
{selector: 'comp', templateUrl: '/base/packages/platform-browser/test/static_assets/test.html'})
class CompWithUrlTemplate {
}
export function main() {
describe('public testing API', () => {
describe('using the async helper with context passing', () => {
beforeEach(function() { this.actuallyDone = false; });
afterEach(function() { expect(this.actuallyDone).toEqual(true); });
it('should run normal tests', function() { this.actuallyDone = true; });
it('should run normal async tests', function(done) {
setTimeout(() => {
this.actuallyDone = true;
done();
}, 0);
});
it('should run async tests with tasks',
async(function() { setTimeout(() => this.actuallyDone = true, 0); }));
it('should run async tests with promises', async(function() {
const p = new Promise((resolve, reject) => setTimeout(resolve, 10));
p.then(() => this.actuallyDone = true);
}));
});
describe('basic context passing to inject, fakeAsync and withModule helpers', () => {
const moduleConfig = {
providers: [FancyService],
};
beforeEach(function() { this.contextModified = false; });
afterEach(function() { expect(this.contextModified).toEqual(true); });
it('should pass context to inject helper',
inject([], function() { this.contextModified = true; }));
it('should pass context to fakeAsync helper',
fakeAsync(function() { this.contextModified = true; }));
it('should pass context to withModule helper - simple',
withModule(moduleConfig, function() { this.contextModified = true; }));
it('should pass context to withModule helper - advanced',
withModule(moduleConfig).inject([FancyService], function(service: FancyService) {
expect(service.value).toBe('real value');
this.contextModified = true;
}));
it('should preserve context when async and inject helpers are combined',
async(inject([], function() { setTimeout(() => this.contextModified = true, 0); })));
it('should preserve context when fakeAsync and inject helpers are combined',
fakeAsync(inject([], function() {
setTimeout(() => this.contextModified = true, 0);
tick(1);
})));
});
describe('using the test injector with the inject helper', () => {
describe('setting up Providers', () => {
beforeEach(() => {
TestBed.configureTestingModule(
{providers: [{provide: FancyService, useValue: new FancyService()}]});
it('should use set up providers', inject([FancyService], (service: FancyService) => {
expect(service.value).toEqual('real value');
}));
it('should wait until returned promises',
async(inject([FancyService], (service: FancyService) => {
service.getAsyncValue().then((value) => expect(value).toEqual('async value'));
service.getTimeoutValue().then((value) => expect(value).toEqual('timeout value'));
})));
it('should allow the use of fakeAsync',
fakeAsync(inject([FancyService], (service: FancyService) => {
let value: string = undefined !;
service.getAsyncValue().then((val) => value = val);
tick();
expect(value).toEqual('async value');
})));
it('should allow use of "done"', (done) => {
inject([FancyService], (service: FancyService) => {
let count = 0;
const id = setInterval(() => {
count++;
if (count > 2) {
clearInterval(id);
done();
}
}, 5);
})(); // inject needs to be invoked explicitly with ().
});
describe('using beforeEach', () => {
beforeEach(inject([FancyService], (service: FancyService) => {
service.value = 'value modified in beforeEach';
}));
it('should use modified providers', inject([FancyService], (service: FancyService) => {
expect(service.value).toEqual('value modified in beforeEach');
}));
});
describe('using async beforeEach', () => {
beforeEach(async(inject([FancyService], (service: FancyService) => {
service.getAsyncValue().then((value) => service.value = value);
})));
it('should use asynchronously modified value',
inject([FancyService], (service: FancyService) => {
expect(service.value).toEqual('async value');
}));
});
});
});
});
describe('using the test injector with modules', () => {
const moduleConfig = {
providers: [FancyService],
imports: [SomeLibModule],
declarations: [SomeDirective, SomePipe, CompUsingModuleDirectiveAndPipe],
};
describe('setting up a module', () => {
beforeEach(() => TestBed.configureTestingModule(moduleConfig));
it('should use set up providers', inject([FancyService], (service: FancyService) => {
expect(service.value).toEqual('real value');
}));
it('should be able to create any declared components', () => {
const compFixture = TestBed.createComponent(CompUsingModuleDirectiveAndPipe);
expect(compFixture.componentInstance).toBeAnInstanceOf(CompUsingModuleDirectiveAndPipe);
});
it('should use set up directives and pipes', () => {
const compFixture = TestBed.createComponent(CompUsingModuleDirectiveAndPipe);
const el = compFixture.debugElement;
compFixture.detectChanges();
expect(el.children[0].properties['title']).toBe('transformed someValue');
});
it('should use set up imported modules',
inject([SomeLibModule], (libModule: SomeLibModule) => {
expect(libModule).toBeAnInstanceOf(SomeLibModule);
}));
describe('provided schemas', () => {
@Component({template: '<some-element [someUnknownProp]="true"></some-element>'})
class ComponentUsingInvalidProperty {
}
beforeEach(() => {
TestBed.configureTestingModule(
{schemas: [CUSTOM_ELEMENTS_SCHEMA], declarations: [ComponentUsingInvalidProperty]});
});
it('should not error on unknown bound properties on custom elements when using the CUSTOM_ELEMENTS_SCHEMA',
() => {
expect(TestBed.createComponent(ComponentUsingInvalidProperty).componentInstance)
.toBeAnInstanceOf(ComponentUsingInvalidProperty);
});
});
});
describe('per test modules', () => {
it('should use set up providers',
withModule(moduleConfig).inject([FancyService], (service: FancyService) => {
expect(service.value).toEqual('real value');
}));
it('should use set up directives and pipes', withModule(moduleConfig, () => {
const compFixture = TestBed.createComponent(CompUsingModuleDirectiveAndPipe);
const el = compFixture.debugElement;
compFixture.detectChanges();
expect(el.children[0].properties['title']).toBe('transformed someValue');
}));
it('should use set up library modules',
withModule(moduleConfig).inject([SomeLibModule], (libModule: SomeLibModule) => {
expect(libModule).toBeAnInstanceOf(SomeLibModule);
}));
});
describe('components with template url', () => {
beforeEach(async(() => {
TestBed.configureTestingModule({declarations: [CompWithUrlTemplate]});
TestBed.compileComponents();
}));
it('should allow to createSync components with templateUrl after explicit async compilation',
() => {
const fixture = TestBed.createComponent(CompWithUrlTemplate);
expect(fixture.nativeElement).toHaveText('from external template\n');
});
});
describe('overwriting metadata', () => {
@Pipe({name: 'undefined'})
class SomePipe {
transform(value: string): string { return `transformed ${value}`; }
}
@Directive({selector: '[undefined]'})
class SomeDirective {
someProp = 'hello';
}
@Component({selector: 'comp', template: 'someText'})
class SomeComponent {
}
@Component({selector: 'comp', template: 'someOtherText'})
class SomeOtherComponent {
}
@NgModule({declarations: [SomeComponent, SomeDirective, SomePipe]})
class SomeModule {
}
beforeEach(() => TestBed.configureTestingModule({imports: [SomeModule]}));
describe('module', () => {
beforeEach(() => {
TestBed.overrideModule(SomeModule, {set: {declarations: [SomeOtherComponent]}});
});
it('should work', () => {
expect(TestBed.createComponent(SomeOtherComponent).componentInstance)
.toBeAnInstanceOf(SomeOtherComponent);
});
});
describe('component', () => {
beforeEach(() => {
TestBed.overrideComponent(
SomeComponent, {set: {selector: 'comp', template: 'newText'}});
});
it('should work', () => {
expect(TestBed.createComponent(SomeComponent).nativeElement).toHaveText('newText');
});
});
describe('directive', () => {
beforeEach(() => {
TestBed
.overrideComponent(
SomeComponent, {set: {selector: 'comp', template: `<div someDir></div>`}})
.overrideDirective(
SomeDirective, {set: {selector: '[someDir]', host: {'[title]': 'someProp'}}});
});
it('should work', () => {
const compFixture = TestBed.createComponent(SomeComponent);
compFixture.detectChanges();
expect(compFixture.debugElement.children[0].properties['title']).toEqual('hello');
});
});
describe('pipe', () => {
beforeEach(() => {
TestBed
.overrideComponent(
SomeComponent, {set: {selector: 'comp', template: `{{'hello' | somePipe}}`}})
.overridePipe(SomePipe, {set: {name: 'somePipe'}});
});
it('should work', () => {
const compFixture = TestBed.createComponent(SomeComponent);
compFixture.detectChanges();
expect(compFixture.nativeElement).toHaveText('transformed hello');
});
});
describe('template', () => {
let testBedSpy: any;
beforeEach(() => {
testBedSpy = spyOn(getTestBed(), 'overrideComponent').and.callThrough();
TestBed.overrideTemplate(SomeComponent, 'newText');
});
it(`should override component's template`, () => {
const fixture = TestBed.createComponent(SomeComponent);
expect(fixture.nativeElement).toHaveText('newText');
expect(testBedSpy).toHaveBeenCalledWith(SomeComponent, {
set: {template: 'newText', templateUrl: null}
});
});
});
});
describe('overriding providers', () => {
describe('in NgModules', () => {
it('should support useValue', () => {
TestBed.configureTestingModule({
providers: [
{provide: 'a', useValue: 'aValue'},
]
});
TestBed.overrideProvider('a', {useValue: 'mockValue'});
expect(TestBed.get('a')).toBe('mockValue');
});
it('should support useFactory', () => {
TestBed.configureTestingModule({
providers: [
{provide: 'dep', useValue: 'depValue'},
{provide: 'a', useValue: 'aValue'},
]
});
TestBed.overrideProvider(
'a', {useFactory: (dep: any) => `mockA: ${dep}`, deps: ['dep']});
expect(TestBed.get('a')).toBe('mockA: depValue');
});
it('should support @Optional without matches', () => {
TestBed.configureTestingModule({
providers: [
{provide: 'a', useValue: 'aValue'},
]
});
TestBed.overrideProvider(
'a', {useFactory: (dep: any) => `mockA: ${dep}`, deps: [[new Optional(), 'dep']]});
expect(TestBed.get('a')).toBe('mockA: null');
});
it('should support Optional with matches', () => {
TestBed.configureTestingModule({
providers: [
{provide: 'dep', useValue: 'depValue'},
{provide: 'a', useValue: 'aValue'},
]
});
TestBed.overrideProvider(
'a', {useFactory: (dep: any) => `mockA: ${dep}`, deps: [[new Optional(), 'dep']]});
expect(TestBed.get('a')).toBe('mockA: depValue');
});
it('should support SkipSelf', () => {
@NgModule({
providers: [
{provide: 'a', useValue: 'aValue'},
{provide: 'dep', useValue: 'depValue'},
]
})
class MyModule {
}
TestBed.overrideProvider(
'a', {useFactory: (dep: any) => `mockA: ${dep}`, deps: [[new SkipSelf(), 'dep']]});
TestBed.configureTestingModule(
{providers: [{provide: 'dep', useValue: 'parentDepValue'}]});
const compiler = TestBed.get(Compiler) as Compiler;
const modFactory = compiler.compileModuleSync(MyModule);
expect(modFactory.create(getTestBed()).injector.get('a')).toBe('mockA: parentDepValue');
});
describe('injecting eager providers into an eager overwritten provider', () => {
@NgModule({
providers: [
{provide: 'a', useFactory: () => 'aValue'},
{provide: 'b', useFactory: () => 'bValue'},
]
})
class MyModule {
// NgModule is eager, which makes all of its deps eager
constructor(@Inject('a') a: any, @Inject('b') b: any) {}
}
it('should inject providers that were declared before', () => {
TestBed.configureTestingModule({imports: [MyModule]});
TestBed.overrideProvider(
'b', {useFactory: (a: string) => `mockB: ${a}`, deps: ['a']});
expect(TestBed.get('b')).toBe('mockB: aValue');
});
it('should inject providers that were declared afterwards', () => {
TestBed.configureTestingModule({imports: [MyModule]});
TestBed.overrideProvider(
'a', {useFactory: (b: string) => `mockA: ${b}`, deps: ['b']});
expect(TestBed.get('a')).toBe('mockA: bValue');
});
});
});
describe('in Components', () => {
it('should support useValue', () => {
@Component({
template: '',
providers: [
{provide: 'a', useValue: 'aValue'},
]
})
class MComp {
}
TestBed.overrideProvider('a', {useValue: 'mockValue'});
const ctx =
TestBed.configureTestingModule({declarations: [MComp]}).createComponent(MComp);
expect(ctx.debugElement.injector.get('a')).toBe('mockValue');
});
it('should support useFactory', () => {
@Component({
template: '',
providers: [
{provide: 'dep', useValue: 'depValue'},
{provide: 'a', useValue: 'aValue'},
]
})
class MyComp {
}
TestBed.overrideProvider(
'a', {useFactory: (dep: any) => `mockA: ${dep}`, deps: ['dep']});
const ctx =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
expect(ctx.debugElement.injector.get('a')).toBe('mockA: depValue');
});
it('should support @Optional without matches', () => {
@Component({
template: '',
providers: [
{provide: 'a', useValue: 'aValue'},
]
})
class MyComp {
}
TestBed.overrideProvider(
'a', {useFactory: (dep: any) => `mockA: ${dep}`, deps: [[new Optional(), 'dep']]});
const ctx =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
expect(ctx.debugElement.injector.get('a')).toBe('mockA: null');
});
it('should support Optional with matches', () => {
@Component({
template: '',
providers: [
{provide: 'dep', useValue: 'depValue'},
{provide: 'a', useValue: 'aValue'},
]
})
class MyComp {
}
TestBed.overrideProvider(
'a', {useFactory: (dep: any) => `mockA: ${dep}`, deps: [[new Optional(), 'dep']]});
const ctx =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
expect(ctx.debugElement.injector.get('a')).toBe('mockA: depValue');
});
it('should support SkipSelf', () => {
@Directive({
selector: '[myDir]',
providers: [
{provide: 'a', useValue: 'aValue'},
{provide: 'dep', useValue: 'depValue'},
]
})
class MyDir {
}
@Component({
template: '<div myDir></div>',
providers: [
{provide: 'dep', useValue: 'parentDepValue'},
]
})
class MyComp {
}
TestBed.overrideProvider(
'a', {useFactory: (dep: any) => `mockA: ${dep}`, deps: [[new SkipSelf(), 'dep']]});
const ctx = TestBed.configureTestingModule({declarations: [MyComp, MyDir]})
.createComponent(MyComp);
expect(ctx.debugElement.children[0].injector.get('a')).toBe('mockA: parentDepValue');
});
it('should support multiple providers in a template', () => {
@Directive({
selector: '[myDir1]',
providers: [
{provide: 'a', useValue: 'aValue1'},
]
})
class MyDir1 {
}
@Directive({
selector: '[myDir2]',
providers: [
{provide: 'a', useValue: 'aValue2'},
]
})
class MyDir2 {
}
@Component({
template: '<div myDir1></div><div myDir2></div>',
})
class MyComp {
}
TestBed.overrideProvider('a', {useValue: 'mockA'});
const ctx = TestBed.configureTestingModule({declarations: [MyComp, MyDir1, MyDir2]})
.createComponent(MyComp);
expect(ctx.debugElement.children[0].injector.get('a')).toBe('mockA');
expect(ctx.debugElement.children[1].injector.get('a')).toBe('mockA');
});
describe('injecting eager providers into an eager overwritten provider', () => {
@Component({
template: '',
providers: [
{provide: 'a', useFactory: () => 'aValue'},
{provide: 'b', useFactory: () => 'bValue'},
]
})
class MyComp {
// Component is eager, which makes all of its deps eager
constructor(@Inject('a') a: any, @Inject('b') b: any) {}
}
it('should inject providers that were declared before it', () => {
TestBed.overrideProvider(
'b', {useFactory: (a: string) => `mockB: ${a}`, deps: ['a']});
const ctx =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
expect(ctx.debugElement.injector.get('b')).toBe('mockB: aValue');
});
it('should inject providers that were declared after it', () => {
TestBed.overrideProvider(
'a', {useFactory: (b: string) => `mockA: ${b}`, deps: ['b']});
const ctx =
TestBed.configureTestingModule({declarations: [MyComp]}).createComponent(MyComp);
expect(ctx.debugElement.injector.get('a')).toBe('mockA: bValue');
});
});
});
it('should reset overrides when the testing modules is resetted', () => {
TestBed.overrideProvider('a', {useValue: 'mockValue'});
TestBed.resetTestingModule();
TestBed.configureTestingModule({providers: [{provide: 'a', useValue: 'aValue'}]});
expect(TestBed.get('a')).toBe('aValue');
});
});
describe('setting up the compiler', () => {
describe('providers', () => {
beforeEach(() => {
const resourceLoaderGet = jasmine.createSpy('resourceLoaderGet')
.and.returnValue(Promise.resolve('Hello world!'));
TestBed.configureTestingModule({declarations: [CompWithUrlTemplate]});
TestBed.configureCompiler(
{providers: [{provide: ResourceLoader, useValue: {get: resourceLoaderGet}}]});
});
it('should use set up providers', fakeAsync(() => {
TestBed.compileComponents();
tick();
const compFixture = TestBed.createComponent(CompWithUrlTemplate);
expect(compFixture.nativeElement).toHaveText('Hello world!');
}));
});
describe('useJit true', () => {
beforeEach(() => TestBed.configureCompiler({useJit: true}));
it('should set the value into CompilerConfig',
inject([CompilerConfig], (config: CompilerConfig) => {
expect(config.useJit).toBe(true);
}));
});
describe('useJit false', () => {
beforeEach(() => TestBed.configureCompiler({useJit: false}));
it('should set the value into CompilerConfig',
inject([CompilerConfig], (config: CompilerConfig) => {
expect(config.useJit).toBe(false);
}));
});
});
});
describe('errors', () => {
let originalJasmineIt: (description: string, func: () => void) => jasmine.Spec;
let originalJasmineBeforeEach: (beforeEachFunction: () => void) => void;
const patchJasmineIt = () => {
let resolve: (result: any) => void;
let reject: (error: any) => void;
const promise = new Promise((res, rej) => {
resolve = res;
reject = rej;
});
originalJasmineIt = jasmine.getEnv().it;
jasmine.getEnv().it = (description: string, fn: (done: DoneFn) => void): any => {
const done = <DoneFn>(() => resolve(null));
done.fail = (err) => reject(err);
fn(done);
return null;
};
return promise;
};
const restoreJasmineIt = () => jasmine.getEnv().it = originalJasmineIt;
const patchJasmineBeforeEach = () => {
let resolve: (result: any) => void;
let reject: (error: any) => void;
const promise = new Promise((res, rej) => {
resolve = res;
reject = rej;
});
originalJasmineBeforeEach = jasmine.getEnv().beforeEach;
jasmine.getEnv().beforeEach = (fn: (done: DoneFn) => void) => {
const done = <DoneFn>(() => resolve(null));
done.fail = (err) => reject(err);
fn(done);
};
return promise;
};
const restoreJasmineBeforeEach = () => jasmine.getEnv().beforeEach =
originalJasmineBeforeEach;
it('should fail when an asynchronous error is thrown', (done) => {
const itPromise = patchJasmineIt();
const barError = new Error('bar');
it('throws an async error',
async(inject([], () => setTimeout(() => { throw barError; }, 0))));
itPromise.then(() => done.fail('Expected test to fail, but it did not'), (err) => {
expect(err).toEqual(barError);
done();
});
restoreJasmineIt();
});
it('should fail when a returned promise is rejected', (done) => {
const itPromise = patchJasmineIt();
it('should fail with an error from a promise', async(inject([], () => {
let reject: (error: any) => void = undefined !;
const promise = new Promise((_, rej) => reject = rej);
const p = promise.then(() => expect(1).toEqual(2));
reject('baz');
return p;
})));
itPromise.then(() => done.fail('Expected test to fail, but it did not'), (err) => {
expect(err.message).toEqual('Uncaught (in promise): baz');
done();
});
restoreJasmineIt();
});
describe('components', () => {
let resourceLoaderGet: jasmine.Spy;
beforeEach(() => {
resourceLoaderGet = jasmine.createSpy('resourceLoaderGet')
.and.returnValue(Promise.resolve('Hello world!'));
TestBed.configureCompiler(
{providers: [{provide: ResourceLoader, useValue: {get: resourceLoaderGet}}]});
});
it('should report an error for declared components with templateUrl which never call TestBed.compileComponents',
() => {
const itPromise = patchJasmineIt();
expect(
() =>
it('should fail', withModule(
{declarations: [CompWithUrlTemplate]},
() => TestBed.createComponent(CompWithUrlTemplate))))
.toThrowError(
`This test module uses the component ${stringify(CompWithUrlTemplate)} which is using a "templateUrl" or "styleUrls", but they were never compiled. ` +
`Please call "TestBed.compileComponents" before your test.`);
restoreJasmineIt();
});
});
it('should error on unknown bound properties on custom elements by default', () => {
@Component({template: '<some-element [someUnknownProp]="true"></some-element>'})
class ComponentUsingInvalidProperty {
}
const itPromise = patchJasmineIt();
expect(
() => it(
'should fail', withModule(
{declarations: [ComponentUsingInvalidProperty]},
() => TestBed.createComponent(ComponentUsingInvalidProperty))))
.toThrowError(/Can't bind to 'someUnknownProp'/);
restoreJasmineIt();
});
});
describe('creating components', () => {
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [
ChildComp,
MyIfComp,
ChildChildComp,
ParentComp,
TestProvidersComp,
TestViewProvidersComp,
]
});
});
it('should instantiate a component with valid DOM', async(() => {
const fixture = TestBed.createComponent(ChildComp);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('Original Child');
}));
it('should allow changing members of the component', async(() => {
const componentFixture = TestBed.createComponent(MyIfComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('MyIf()');
componentFixture.componentInstance.showMore = true;
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('MyIf(More)');
}));
it('should override a template', async(() => {
TestBed.overrideComponent(ChildComp, {set: {template: '<span>Mock</span>'}});
const componentFixture = TestBed.createComponent(ChildComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('Mock');
}));
it('should override a provider', async(() => {
TestBed.overrideComponent(
TestProvidersComp,
{set: {providers: [{provide: FancyService, useClass: MockFancyService}]}});
const componentFixture = TestBed.createComponent(TestProvidersComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('injected value: mocked out value');
}));
it('should override a viewProvider', async(() => {
TestBed.overrideComponent(
TestViewProvidersComp,
{set: {viewProviders: [{provide: FancyService, useClass: MockFancyService}]}});
const componentFixture = TestBed.createComponent(TestViewProvidersComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('injected value: mocked out value');
}));
});
describe('using alternate components', () => {
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [
MockChildComp,
ParentComp,
]
});
});
it('should override component dependencies', async(() => {
const componentFixture = TestBed.createComponent(ParentComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('Parent(Mock)');
}));
});
});
}