angular-cn/packages/elements/test/component-factory-strategy_...

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/**
* @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 {ComponentFactory, ComponentRef, Injector, NgModuleRef, SimpleChange, SimpleChanges, Type} from '@angular/core';
import {fakeAsync, tick} from '@angular/core/testing';
import {Subject} from 'rxjs';
import {ComponentNgElementStrategy, ComponentNgElementStrategyFactory} from '../src/component-factory-strategy';
import {NgElementStrategyEvent} from '../src/element-strategy';
describe('ComponentFactoryNgElementStrategy', () => {
let factory: FakeComponentFactory;
let strategy: ComponentNgElementStrategy;
let injector: any;
let componentRef: any;
let applicationRef: any;
beforeEach(() => {
factory = new FakeComponentFactory();
componentRef = factory.componentRef;
applicationRef = jasmine.createSpyObj('applicationRef', ['attachView']);
injector = jasmine.createSpyObj('injector', ['get']);
injector.get.and.returnValue(applicationRef);
strategy = new ComponentNgElementStrategy(factory, injector);
});
it('should create a new strategy from the factory', () => {
const factoryResolver = jasmine.createSpyObj('factoryResolver', ['resolveComponentFactory']);
factoryResolver.resolveComponentFactory.and.returnValue(factory);
injector.get.and.returnValue(factoryResolver);
const strategyFactory = new ComponentNgElementStrategyFactory(FakeComponent, injector);
expect(strategyFactory.create(injector)).toBeTruthy();
});
describe('after connected', () => {
beforeEach(() => {
// Set up an initial value to make sure it is passed to the component
strategy.setInputValue('fooFoo', 'fooFoo-1');
strategy.setInputValue('falsyUndefined', undefined);
strategy.setInputValue('falsyNull', null);
strategy.setInputValue('falsyEmpty', '');
strategy.setInputValue('falsyFalse', false);
strategy.setInputValue('falsyZero', 0);
strategy.connect(document.createElement('div'));
});
it('should attach the component to the view',
() => { expect(applicationRef.attachView).toHaveBeenCalledWith(componentRef.hostView); });
it('should detect changes',
() => { expect(componentRef.changeDetectorRef.detectChanges).toHaveBeenCalled(); });
it('should listen to output events', () => {
const events: NgElementStrategyEvent[] = [];
strategy.events.subscribe(e => events.push(e));
componentRef.instance.output1.next('output-1a');
componentRef.instance.output1.next('output-1b');
componentRef.instance.output2.next('output-2a');
expect(events).toEqual([
{name: 'templateOutput1', value: 'output-1a'},
{name: 'templateOutput1', value: 'output-1b'},
{name: 'templateOutput2', value: 'output-2a'},
]);
});
it('should initialize the component with initial values', () => {
expect(strategy.getInputValue('fooFoo')).toBe('fooFoo-1');
expect(componentRef.instance.fooFoo).toBe('fooFoo-1');
});
it('should initialize the component with falsy initial values', () => {
expect(strategy.getInputValue('falsyUndefined')).toEqual(undefined);
expect(componentRef.instance.falsyUndefined).toEqual(undefined);
expect(strategy.getInputValue('falsyNull')).toEqual(null);
expect(componentRef.instance.falsyNull).toEqual(null);
expect(strategy.getInputValue('falsyEmpty')).toEqual('');
expect(componentRef.instance.falsyEmpty).toEqual('');
expect(strategy.getInputValue('falsyFalse')).toEqual(false);
expect(componentRef.instance.falsyFalse).toEqual(false);
expect(strategy.getInputValue('falsyZero')).toEqual(0);
expect(componentRef.instance.falsyZero).toEqual(0);
});
it('should call ngOnChanges with the change', () => {
expectSimpleChanges(componentRef.instance.simpleChanges[0], {
fooFoo: new SimpleChange(undefined, 'fooFoo-1', true),
falsyUndefined: new SimpleChange(undefined, undefined, true),
falsyNull: new SimpleChange(undefined, null, true),
falsyEmpty: new SimpleChange(undefined, '', true),
falsyFalse: new SimpleChange(undefined, false, true),
falsyZero: new SimpleChange(undefined, 0, true),
});
});
it('should call ngOnChanges with proper firstChange value', fakeAsync(() => {
strategy.setInputValue('fooFoo', 'fooFoo-2');
strategy.setInputValue('barBar', 'barBar-1');
strategy.setInputValue('falsyUndefined', 'notanymore');
tick(16); // scheduler waits 16ms if RAF is unavailable
(strategy as any).detectChanges();
expectSimpleChanges(componentRef.instance.simpleChanges[1], {
fooFoo: new SimpleChange('fooFoo-1', 'fooFoo-2', false),
barBar: new SimpleChange(undefined, 'barBar-1', true),
falsyUndefined: new SimpleChange(undefined, 'notanymore', false),
});
}));
});
it('should not call ngOnChanges if not present on the component', () => {
factory.componentRef.instance = new FakeComponentWithoutNgOnChanges();
// Should simply succeed without problems (did not try to call ngOnChanges)
strategy.connect(document.createElement('div'));
});
describe('when inputs change and not connected', () => {
it('should cache the value', () => {
strategy.setInputValue('fooFoo', 'fooFoo-1');
expect(strategy.getInputValue('fooFoo')).toBe('fooFoo-1');
// Sanity check: componentRef isn't changed since its not even on the strategy
expect(componentRef.instance.fooFoo).toBe(undefined);
});
it('should not detect changes', fakeAsync(() => {
strategy.setInputValue('fooFoo', 'fooFoo-1');
tick(16); // scheduler waits 16ms if RAF is unavailable
expect(componentRef.changeDetectorRef.detectChanges).not.toHaveBeenCalled();
}));
});
describe('when inputs change and is connected', () => {
beforeEach(() => { strategy.connect(document.createElement('div')); });
it('should be set on the component instance', () => {
strategy.setInputValue('fooFoo', 'fooFoo-1');
expect(componentRef.instance.fooFoo).toBe('fooFoo-1');
expect(strategy.getInputValue('fooFoo')).toBe('fooFoo-1');
});
it('should detect changes', fakeAsync(() => {
// Connect detected changes automatically
expect(componentRef.changeDetectorRef.detectChanges).toHaveBeenCalledTimes(1);
strategy.setInputValue('fooFoo', 'fooFoo-1');
tick(16); // scheduler waits 16ms if RAF is unavailable
expect(componentRef.changeDetectorRef.detectChanges).toHaveBeenCalledTimes(2);
}));
it('should detect changes once for multiple input changes', fakeAsync(() => {
// Connect detected changes automatically
expect(componentRef.changeDetectorRef.detectChanges).toHaveBeenCalledTimes(1);
strategy.setInputValue('fooFoo', 'fooFoo-1');
strategy.setInputValue('barBar', 'barBar-1');
tick(16); // scheduler waits 16ms if RAF is unavailable
expect(componentRef.changeDetectorRef.detectChanges).toHaveBeenCalledTimes(2);
}));
it('should call ngOnChanges', fakeAsync(() => {
strategy.setInputValue('fooFoo', 'fooFoo-1');
tick(16); // scheduler waits 16ms if RAF is unavailable
expectSimpleChanges(
componentRef.instance.simpleChanges[0],
{fooFoo: new SimpleChange(undefined, 'fooFoo-1', true)});
}));
it('should call ngOnChanges once for multiple input changes', fakeAsync(() => {
strategy.setInputValue('fooFoo', 'fooFoo-1');
strategy.setInputValue('barBar', 'barBar-1');
tick(16); // scheduler waits 16ms if RAF is unavailable
expectSimpleChanges(componentRef.instance.simpleChanges[0], {
fooFoo: new SimpleChange(undefined, 'fooFoo-1', true),
barBar: new SimpleChange(undefined, 'barBar-1', true)
});
}));
it('should call ngOnChanges twice for changes in different rounds with previous values',
fakeAsync(() => {
strategy.setInputValue('fooFoo', 'fooFoo-1');
strategy.setInputValue('barBar', 'barBar-1');
tick(16); // scheduler waits 16ms if RAF is unavailable
expectSimpleChanges(componentRef.instance.simpleChanges[0], {
fooFoo: new SimpleChange(undefined, 'fooFoo-1', true),
barBar: new SimpleChange(undefined, 'barBar-1', true)
});
strategy.setInputValue('fooFoo', 'fooFoo-2');
strategy.setInputValue('barBar', 'barBar-2');
tick(16); // scheduler waits 16ms if RAF is unavailable
expectSimpleChanges(componentRef.instance.simpleChanges[1], {
fooFoo: new SimpleChange('fooFoo-1', 'fooFoo-2', false),
barBar: new SimpleChange('barBar-1', 'barBar-2', false)
});
}));
});
describe('disconnect', () => {
it('should be able to call if not connected', fakeAsync(() => {
strategy.disconnect();
// Sanity check: the strategy doesn't have an instance of the componentRef anyways
expect(componentRef.destroy).not.toHaveBeenCalled();
}));
it('should destroy the component after the destroy delay', fakeAsync(() => {
strategy.connect(document.createElement('div'));
strategy.disconnect();
expect(componentRef.destroy).not.toHaveBeenCalled();
tick(10);
expect(componentRef.destroy).toHaveBeenCalledTimes(1);
}));
it('should be able to call it multiple times but only destroy once', fakeAsync(() => {
strategy.connect(document.createElement('div'));
strategy.disconnect();
strategy.disconnect();
expect(componentRef.destroy).not.toHaveBeenCalled();
tick(10);
expect(componentRef.destroy).toHaveBeenCalledTimes(1);
strategy.disconnect();
expect(componentRef.destroy).toHaveBeenCalledTimes(1);
}));
});
});
export class FakeComponentWithoutNgOnChanges {
output1 = new Subject();
output2 = new Subject();
}
export class FakeComponent {
output1 = new Subject();
output2 = new Subject();
// Keep track of the simple changes passed to ngOnChanges
simpleChanges: SimpleChanges[] = [];
ngOnChanges(simpleChanges: SimpleChanges) { this.simpleChanges.push(simpleChanges); }
}
export class FakeComponentFactory extends ComponentFactory<any> {
componentRef: any = jasmine.createSpyObj(
'componentRef', ['instance', 'changeDetectorRef', 'hostView', 'destroy']);
constructor() {
super();
this.componentRef.instance = new FakeComponent();
this.componentRef.changeDetectorRef =
jasmine.createSpyObj('changeDetectorRef', ['detectChanges']);
}
get selector(): string { return 'fake-component'; }
get componentType(): Type<any> { return FakeComponent; }
get ngContentSelectors(): string[] { return ['content-1', 'content-2']; }
get inputs(): {propName: string; templateName: string}[] {
return [
{propName: 'fooFoo', templateName: 'fooFoo'},
{propName: 'barBar', templateName: 'my-bar-bar'},
{propName: 'falsyUndefined', templateName: 'falsyUndefined'},
{propName: 'falsyNull', templateName: 'falsyNull'},
{propName: 'falsyEmpty', templateName: 'falsyEmpty'},
{propName: 'falsyFalse', templateName: 'falsyFalse'},
{propName: 'falsyZero', templateName: 'falsyZero'},
];
}
get outputs(): {propName: string; templateName: string}[] {
return [
{propName: 'output1', templateName: 'templateOutput1'},
{propName: 'output2', templateName: 'templateOutput2'},
];
}
create(
injector: Injector, projectableNodes?: any[][], rootSelectorOrNode?: string|any,
ngModule?: NgModuleRef<any>): ComponentRef<any> {
return this.componentRef;
}
}
function expectSimpleChanges(actual: SimpleChanges, expected: SimpleChanges) {
Object.keys(actual).forEach(
key => { expect(expected[key]).toBeTruthy(`Change included additional key ${key}`); });
Object.keys(expected).forEach(key => {
expect(actual[key]).toBeTruthy(`Change should have included key ${key}`);
if (actual[key]) {
expect(actual[key].previousValue).toBe(expected[key].previousValue, `${key}.previousValue`);
expect(actual[key].currentValue).toBe(expected[key].currentValue, `${key}.currentValue`);
expect(actual[key].firstChange).toBe(expected[key].firstChange, `${key}.firstChange`);
}
});
}