angular-cn/modules/@angular/platform-browser/test/testing_public_spec.ts

391 lines
13 KiB
TypeScript

import {
it,
iit,
xit,
describe,
ddescribe,
xdescribe,
expect,
beforeEach,
inject,
beforeEachProviders
} from '@angular/core/testing';
import {
fakeAsync,
async,
withProviders,
tick,
} from '@angular/core/testing';
import {TestComponentBuilder} from '@angular/compiler/testing';
import {Injectable, provide, Component, ViewMetadata} from '@angular/core';
import {NgIf} from '@angular/common';
import {PromiseWrapper} from '../../http/src/facade/promise';
// Services, and components for the tests.
@Component(
{selector: 'child-comp', template: `<span>Original {{childBinding}}</span>`, directives: []})
@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>)`,
directives: [ChildComp]
})
@Injectable()
class ParentComp {
}
@Component({
selector: 'my-if-comp',
template: `MyIf(<span *ngIf="showMore">More</span>)`,
directives: [NgIf]
})
@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>`,
directives: [ChildChildComp]
})
@Injectable()
class ChildWithChildComp {
childBinding: string;
constructor() { this.childBinding = 'Child'; }
}
@Component({selector: 'child-child-comp', template: `<span>ChildChild Mock</span>`})
@Injectable()
class MockChildChildComp {
}
class FancyService {
value: string = 'real value';
getAsyncValue() { return Promise.resolve('async value'); }
getTimeoutValue() {
return new Promise((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) {}
}
export function main() {
describe('using the async helper', () => {
var actuallyDone: boolean;
beforeEach(() => { actuallyDone = false; });
afterEach(() => { expect(actuallyDone).toEqual(true); });
it('should run normal tests', () => { actuallyDone = true; });
it('should run normal async tests', (done) => {
setTimeout(() => {
actuallyDone = true;
done();
}, 0);
});
it('should run async tests with tasks',
async(() => { setTimeout(() => { actuallyDone = true; }, 0); }));
it('should run async tests with promises', async(() => {
var p = new Promise((resolve, reject) => { setTimeout(resolve, 10); });
p.then(() => { actuallyDone = true; });
}));
});
describe('using the test injector with the inject helper', () => {
describe('setting up Providers', () => {
beforeEachProviders(() => [{provide: FancyService, useValue: new FancyService()}]);
it('should use set up providers',
inject([FancyService], (service) => { expect(service.value).toEqual('real value'); }));
it('should wait until returned promises', async(inject([FancyService], (service) => {
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) => {
var value;
service.getAsyncValue().then(function(val) { value = val; });
tick();
expect(value).toEqual('async value');
})));
it('should allow use of "done"', (done) => {
inject([FancyService], (service) => {
let count = 0;
let id = setInterval(() => {
count++;
if (count > 2) {
clearInterval(id);
done();
}
}, 5);
})(); // inject needs to be invoked explicitly with ().
});
describe('using beforeEach', () => {
beforeEach(inject([FancyService],
(service) => { service.value = 'value modified in beforeEach'; }));
it('should use modified providers', inject([FancyService], (service) => {
expect(service.value).toEqual('value modified in beforeEach');
}));
});
describe('using async beforeEach', () => {
beforeEach(async(inject([FancyService], (service) => {
service.getAsyncValue().then((value) => { service.value = value; });
})));
it('should use asynchronously modified value',
inject([FancyService], (service) => { expect(service.value).toEqual('async value'); }));
});
});
describe('per test providers', () => {
it('should allow per test providers',
withProviders(() => [{provide: FancyService, useValue: new FancyService()}])
.inject([FancyService],
(service) => { expect(service.value).toEqual('real value'); }));
it('should return value from inject', () => {
let retval = withProviders(() => [{provide: FancyService, useValue: new FancyService()}])
.inject([FancyService], (service) => {
expect(service.value).toEqual('real value');
return 10;
})();
expect(retval).toBe(10);
});
});
});
describe('errors', () => {
var originalJasmineIt: any;
var originalJasmineBeforeEach: any;
var patchJasmineIt = () => {
var deferred = PromiseWrapper.completer();
originalJasmineIt = jasmine.getEnv().it;
jasmine.getEnv().it = (description: string, fn) => {
var done = () => { deferred.resolve() };
(<any>done).fail = (err) => { deferred.reject(err) };
fn(done);
return null;
};
return deferred.promise;
};
var restoreJasmineIt = () => { jasmine.getEnv().it = originalJasmineIt; };
var patchJasmineBeforeEach = () => {
var deferred = PromiseWrapper.completer();
originalJasmineBeforeEach = jasmine.getEnv().beforeEach;
jasmine.getEnv().beforeEach = (fn: any) => {
var done = () => { deferred.resolve() };
(<any>done).fail = (err) => { deferred.reject(err) };
fn(done);
return null;
};
return deferred.promise;
};
var restoreJasmineBeforeEach =
() => { jasmine.getEnv().beforeEach = originalJasmineBeforeEach; };
it('should fail when an asynchronous error is thrown', (done) => {
var itPromise = patchJasmineIt();
it('throws an async error',
async(inject([], () => { setTimeout(() => { throw new Error('bar'); }, 0); })));
itPromise.then(() => { done.fail('Expected test to fail, but it did not'); }, (err) => {
expect(err).toEqual('bar');
done();
});
restoreJasmineIt();
});
it('should fail when a returned promise is rejected', (done) => {
var itPromise = patchJasmineIt();
it('should fail with an error from a promise', async(inject([], () => {
var deferred = PromiseWrapper.completer();
var p = deferred.promise.then(() => { expect(1).toEqual(2); });
deferred.reject('baz');
return p;
})));
itPromise.then(() => { done.fail('Expected test to fail, but it did not'); }, (err) => {
expect(err).toEqual('Uncaught (in promise): baz');
done();
});
restoreJasmineIt();
});
describe('using beforeEachProviders', () => {
beforeEachProviders(() => [{provide: FancyService, useValue: new FancyService()}]);
beforeEach(
inject([FancyService], (service) => { expect(service.value).toEqual('real value'); }));
describe('nested beforeEachProviders', () => {
it('should fail when the injector has already been used', () => {
patchJasmineBeforeEach();
expect(() => {
beforeEachProviders(() => [{provide: FancyService, useValue: new FancyService()}]);
})
.toThrowError('beforeEachProviders was called after the injector had been used ' +
'in a beforeEach or it block. This invalidates the test injector');
restoreJasmineBeforeEach();
});
});
});
});
describe('test component builder', function() {
it('should instantiate a component with valid DOM',
async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb.createAsync(ChildComp).then((componentFixture) => {
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement).toHaveText('Original Child');
});
})));
it('should allow changing members of the component',
async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb.createAsync(MyIfComp).then((componentFixture) => {
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement).toHaveText('MyIf()');
componentFixture.debugElement.componentInstance.showMore = true;
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement).toHaveText('MyIf(More)');
});
})));
it('should override a template',
async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb.overrideTemplate(MockChildComp, '<span>Mock</span>')
.createAsync(MockChildComp)
.then((componentFixture) => {
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement).toHaveText('Mock');
});
})));
it('should override a view',
async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb.overrideView(ChildComp,
new ViewMetadata({template: '<span>Modified {{childBinding}}</span>'}))
.createAsync(ChildComp)
.then((componentFixture) => {
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement).toHaveText('Modified Child');
});
})));
it('should override component dependencies',
async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb.overrideDirective(ParentComp, ChildComp, MockChildComp)
.createAsync(ParentComp)
.then((componentFixture) => {
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement).toHaveText('Parent(Mock)');
});
})));
it("should override child component's dependencies",
async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb.overrideDirective(ParentComp, ChildComp, ChildWithChildComp)
.overrideDirective(ChildWithChildComp, ChildChildComp, MockChildChildComp)
.createAsync(ParentComp)
.then((componentFixture) => {
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement)
.toHaveText('Parent(Original Child(ChildChild Mock))');
});
})));
it('should override a provider',
async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb.overrideProviders(TestProvidersComp, [{provide: FancyService, useClass: MockFancyService}])
.createAsync(TestProvidersComp)
.then((componentFixture) => {
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement)
.toHaveText('injected value: mocked out value');
});
})));
it('should override a viewProvider',
async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
tcb.overrideViewProviders(TestViewProvidersComp,
[{provide: FancyService, useClass: MockFancyService}])
.createAsync(TestViewProvidersComp)
.then((componentFixture) => {
componentFixture.detectChanges();
expect(componentFixture.debugElement.nativeElement)
.toHaveText('injected value: mocked out value');
});
})));
});
}