期望测试失败

🌐 Expecting tests to fail

这会颠倒特定测试或测试套件的通过/失败报告：被标记的测试/测试用例必须抛出异常才能“通过”；未抛出异常的测试/测试用例则失败。

🌐 This flips the pass/fail reporting for a specific test or suite: A flagged test/test-case must throw in order to "pass"; a test/test-case that does not throw, fails.

在下文中，doTheThing() 当前 返回 false（false 不等于 true，导致 strictEqual 抛出异常，因此测试用例通过）。

🌐 In the following, doTheThing() returns currently false (false does not equal true, causing strictEqual to throw, so the test-case passes).

it.expectFailure('should do the thing', () => {
  assert.strictEqual(doTheThing(), true);
});

it('should do the thing', { expectFailure: true }, () => {
  assert.strictEqual(doTheThing(), true);
}); 拷贝

skip 和/或 todo 与 expectFailure 互斥，而 skip 或 todo 在同时应用时会“胜出”（skip 对两者都胜出，而 todo 胜过 expectFailure）。

这些测试将被跳过（不会运行）：

🌐 These tests will be skipped (and not run):

it.expectFailure('should do the thing', { skip: true }, () => {
  assert.strictEqual(doTheThing(), true);
});

it.skip('should do the thing', { expectFailure: true }, () => {
  assert.strictEqual(doTheThing(), true);
}); 拷贝

这些测试将被标记为“待办”（忽略错误）:

🌐 These tests will be marked "todo" (silencing errors):

it.expectFailure('should do the thing', { todo: true }, () => {
  assert.strictEqual(doTheThing(), true);
});

it.todo('should do the thing', { expectFailure: true }, () => {
  assert.strictEqual(doTheThing(), true);
}); 拷贝