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Copy pathtesting_internal.ts
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203 lines (170 loc) · 5.69 KB
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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 {ɵisPromise as isPromise} from '@angular/core';
import {global} from '@angular/core/src/util';
import {AsyncTestCompleter} from './async_test_completer';
import {getTestBed, inject} from './test_bed';
export {AsyncTestCompleter} from './async_test_completer';
export {inject} from './test_bed';
export * from './logger';
export * from './ng_zone_mock';
export const proxy: ClassDecorator = (t: any) => t;
const _global = <any>(typeof window === 'undefined' ? global : window);
export const afterEach: Function = _global.afterEach;
export const expect: (actual: any) => jasmine.Matchers = _global.expect;
const jsmBeforeEach = _global.beforeEach;
const jsmDescribe = _global.describe;
const jsmDDescribe = _global.fdescribe;
const jsmXDescribe = _global.xdescribe;
const jsmIt = _global.it;
const jsmIIt = _global.fit;
const jsmXIt = _global.xit;
const runnerStack: BeforeEachRunner[] = [];
jasmine.DEFAULT_TIMEOUT_INTERVAL = 3000;
const globalTimeOut = jasmine.DEFAULT_TIMEOUT_INTERVAL;
const testBed = getTestBed();
/**
* Mechanism to run `beforeEach()` functions of Angular tests.
*
* Note: Jasmine own `beforeEach` is used by this library to handle DI providers.
*/
class BeforeEachRunner {
private _fns: Array<Function> = [];
constructor(private _parent: BeforeEachRunner) {}
beforeEach(fn: Function): void { this._fns.push(fn); }
run(): void {
if (this._parent) this._parent.run();
this._fns.forEach((fn) => { fn(); });
}
}
// Reset the test providers before each test
jsmBeforeEach(() => { testBed.resetTestingModule(); });
function _describe(jsmFn: Function, ...args: any[]) {
const parentRunner = runnerStack.length === 0 ? null : runnerStack[runnerStack.length - 1];
const runner = new BeforeEachRunner(parentRunner !);
runnerStack.push(runner);
const suite = jsmFn(...args);
runnerStack.pop();
return suite;
}
export function describe(...args: any[]): void {
return _describe(jsmDescribe, ...args);
}
export function ddescribe(...args: any[]): void {
return _describe(jsmDDescribe, ...args);
}
export function xdescribe(...args: any[]): void {
return _describe(jsmXDescribe, ...args);
}
export function beforeEach(fn: Function): void {
if (runnerStack.length > 0) {
// Inside a describe block, beforeEach() uses a BeforeEachRunner
runnerStack[runnerStack.length - 1].beforeEach(fn);
} else {
// Top level beforeEach() are delegated to jasmine
jsmBeforeEach(fn);
}
}
/**
* Allows overriding default providers defined in test_injector.js.
*
* The given function must return a list of DI providers.
*
* Example:
*
* beforeEachProviders(() => [
* {provide: Compiler, useClass: MockCompiler},
* {provide: SomeToken, useValue: myValue},
* ]);
*/
export function beforeEachProviders(fn: Function): void {
jsmBeforeEach(() => {
const providers = fn();
if (!providers) return;
testBed.configureTestingModule({providers: providers});
});
}
function _it(jsmFn: Function, name: string, testFn: Function, testTimeOut: number): void {
if (runnerStack.length == 0) {
// This left here intentionally, as we should never get here, and it aids debugging.
debugger;
throw new Error('Empty Stack!');
}
const runner = runnerStack[runnerStack.length - 1];
const timeOut = Math.max(globalTimeOut, testTimeOut);
jsmFn(name, (done: any) => {
const completerProvider = {
provide: AsyncTestCompleter,
useFactory: () => {
// Mark the test as async when an AsyncTestCompleter is injected in an it()
return new AsyncTestCompleter();
}
};
testBed.configureTestingModule({providers: [completerProvider]});
runner.run();
if (testFn.length == 0) {
const retVal = testFn();
if (isPromise(retVal)) {
// Asynchronous test function that returns a Promise - wait for completion.
(<Promise<any>>retVal).then(done, done.fail);
} else {
// Synchronous test function - complete immediately.
done();
}
} else {
// Asynchronous test function that takes in 'done' parameter.
testFn(done);
}
}, timeOut);
}
export function it(name: any, fn: any, timeOut: any = null): void {
return _it(jsmIt, name, fn, timeOut);
}
export function xit(name: any, fn: any, timeOut: any = null): void {
return _it(jsmXIt, name, fn, timeOut);
}
export function iit(name: any, fn: any, timeOut: any = null): void {
return _it(jsmIIt, name, fn, timeOut);
}
export class SpyObject {
constructor(type?: any) {
if (type) {
for (const prop in type.prototype) {
let m: any = null;
try {
m = type.prototype[prop];
} catch (e) {
// As we are creating spys for abstract classes,
// these classes might have getters that throw when they are accessed.
// As we are only auto creating spys for methods, this
// should not matter.
}
if (typeof m === 'function') {
this.spy(prop);
}
}
}
}
spy(name: string) {
if (!(this as any)[name]) {
(this as any)[name] = jasmine.createSpy(name);
}
return (this as any)[name];
}
prop(name: string, value: any) { (this as any)[name] = value; }
static stub(object: any = null, config: any = null, overrides: any = null) {
if (!(object instanceof SpyObject)) {
overrides = config;
config = object;
object = new SpyObject();
}
const m = {...config, ...overrides};
Object.keys(m).forEach(key => { object.spy(key).and.returnValue(m[key]); });
return object;
}
}