testing - Angular2 RC4 测试 : Uncaught (in promise): TypeError: testing_1. expect(...).toBeAnInstanceOf 不是函数

Question

这是我在 Angular2 中的测试:

it('should initialize without DI service',
         async(inject([TestComponentBuilder], (tcb: TestComponentBuilder) => {
           var template = '<component></component>';
           return tcb.overrideTemplate(TestComponent, template)
               .createAsync(TestComponent)
               .then((fixture ) => {
                 expect(fixture.debugElement.children[0].componentInstance).toBeAnInstanceOf(ComponentType);
                 expect(fixture.debugElement.children[0].componentInstance.state).toBeNull();
               });
         })));

它抛出以下错误:

Uncaught (in promise): TypeError: testing_1.expect(...).toBeAnInstanceOf is not a function

在我更新到 RC4 之前，它在 Angular2 RC2 中运行良好。

Answer 1

由于这个问题已经很长时间没有得到解答，这篇其他帖子可能对 future 有所帮助:

Uncaught TypeError: ctorParameters.map is not a function