Question

现在几乎要炸一整天，以尝试进行异步测试。对于各种测试，我需要调用whenStable（），等待它，然后执行测试。当我尝试使用所有承诺时，测试全部通过，然后在最后暂停几秒钟，我得到一个错误：“未捕获的错误：在没有当前规范时使用了'期望'，这可能是因为异步测试超时”

  it('should switch tabs', async(() => {
    const fixture = TestBed.createComponent(C2Component);
    const component = fixture.debugElement.componentInstance;
    fixture.whenStable().then(() => {
      expect(true).toBeTruthy();
    });
  }));

如果这是我唯一进行过的异步测试，并且我将其注释掉，则测试将通过（全部通过），最后我不会出错。一旦我添加了这些，它们就会（全部通过）运行，然后最后我得到错误消息。

karma.conf.js：

// Karma configuration file, see link for more information
// https://karma-runner.github.io/1.0/config/configuration-file.html

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular-devkit/build-angular'],
    plugins: [
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
      require('karma-jasmine-html-reporter'),
      require('karma-coverage-istanbul-reporter'),
      require('@angular-devkit/build-angular/plugins/karma')
    ],
    client: {
      clearContext: false // leave Jasmine Spec Runner output visible in browser
    },
    coverageIstanbulReporter: {
      dir: require('path').join(__dirname, '../coverage'),
      reports: ['html', 'lcovonly'],
      fixWebpackSourcePaths: true
    },
    reporters: ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false
  });
};

我尝试了这些不同版本的测试：

  it('should switch tabs', (done) => {
    const fixture = TestBed.createComponent(C2Component);
    const component = fixture.debugElement.componentInstance;
    fixture.whenStable().then(() => {
      expect(true).toBeTruthy();
      done();
    });
  });

  it('should switch tabs', async () => {
    const fixture = TestBed.createComponent(C2Component);
    const component = fixture.debugElement.componentInstance;
    await fixture.whenStable()
    expect(true).toBeTruthy();
  });

如果没有当前规范，则在成功完成测试后使用“期望”

0 个答案: