用茉莉花测试打字稿联合类型

Question

我有一个单元测试，它检查我的路由配置的值：

expect(route).toEqual(['', 'login']);

route被定义为string | string[]的联合类型

我已经尝试过类似的操作，但是不起作用：

expect(route as string[]).toEqual(['', 'login']);

茉莉花报告：

Expected value to equal:
  ["", "login"]
Received:
  ""
Difference:
  Comparing two different types of values. Expected array but received string.

如何告诉茉莉花以字符串数组测试我的路由？

Answer 1

如@ TitianCernicova-Dragomir所评论，该测试已正确编写。这里是一个简化的测试：

it('jasmine should interpret ts union types properly', () => {
  let foo: string | string[] = ['1', '2'];
  expect(foo).toEqual(['1', '2']);
});