无法运行最简单的rxjs-marble测试

Question

在全新安装的ng new myapp (cli版本1.6.8，Angular 5.2.0，rxjs 5.5.6)上，我安装了rxjs marble。

由于一些配置原因，我在运行非常基本的测试时遇到了问题。谁能告诉我哪里出了问题？

import { TestBed, async } from '@angular/core/testing';
import { marbles } from 'rxjs-marbles/jasmine';
import { map } from 'rxjs/operators';
import { AppComponent } from './app.component';

describe('AppComponent', () => {
  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [
        AppComponent,
      ],
    }).compileComponents();
  }));

  it('should see mapped values', marbles(m => {
    const values = { a: 1, b: 2, c: 3, x: 2, y: 4, z: 6 };

    const source = m.cold('--a---b---c-|', values);
    const expected = m.cold('--x---y---z-|', values);
    const result = source.pipe(map(x => x * 2));
    m.expect(result).toBeObservable(expected);
  }));
});

控制台错误：

ERROR in ./node_modules/rxjs-marbles/esm5/marbles.js
Module not found: Error: Can't resolve 'rxjs/testing' in '/Users/armo/Code/rxjsmarbles/node_modules/rxjs-marbles/esm5'
 @ ./node_modules/rxjs-marbles/esm5/marbles.js 9:0-45
 @ ./node_modules/rxjs-marbles/esm5/jasmine/index.js
 @ ./src/app/app.component.spec.ts
 @ ./src \.spec\.ts$
 @ ./src/test.ts

ERROR in ./node_modules/rxjs-marbles/esm5/context-deprecated.js
Module not found: Error: Can't resolve 'rxjs/testing' in '/Users/armo/Code/rxjsmarbles/node_modules/rxjs-marbles/esm5'
 @ ./node_modules/rxjs-marbles/esm5/context-deprecated.js 10:0-45
 @ ./node_modules/rxjs-marbles/esm5/marbles.js
 @ ./node_modules/rxjs-marbles/esm5/jasmine/index.js
 @ ./src/app/app.component.spec.ts
 @ ./src \.spec\.ts$
 @ ./src/test.ts

ERROR in ./node_modules/rxjs-marbles/esm5/context-run.js
Module not found: Error: Can't resolve 'rxjs/testing' in '/Users/armo/Code/rxjsmarbles/node_modules/rxjs-marbles/esm5'
 @ ./node_modules/rxjs-marbles/esm5/context-run.js 1:0-45
 @ ./node_modules/rxjs-marbles/esm5/marbles.js
 @ ./node_modules/rxjs-marbles/esm5/jasmine/index.js
 @ ./src/app/app.component.spec.ts
 @ ./src \.spec\.ts$
 @ ./src/test.ts
ERROR in node_modules/rxjs-marbles/context.d.ts(1,22): error TS2305: Module '"/Users/armo/Code/rxjsmarbles/node_modules/rxjs/Rx"' has no exported member 'SchedulerLike'.
node_modules/rxjs-marbles/context.d.ts(2,31): error TS2307: Cannot find module 'rxjs/testing'.
node_modules/rxjs-marbles/types.d.ts(2,31): error TS2307: Cannot find module 'rxjs/testing'.

Answer 1

rxjs-marbles versions 3 and later depend upon RxJS version 6.

如果您使用的是RxJS版本5，则需要使用最新版本为2.4.1的rxjs-marbles版本2。

如果您使用该版本的文档，则应该参考README in that version's branch，而不是master中的自述文件。