检查测试是否在 Jest 的 afterEach 中失败

问题描述

当我的一个 Jest 测试失败时，我想存储屏幕截图，但仅限于失败时.

When one of my Jest tests fails I want to store a screenshot, but only when it fails.

这里以我的一段测试代码为例，afterEach 中的 !passed 部分不起作用.

Here is a piece of my test code as an example, the !passed part in the afterEach is not working.

describe('Page', () => {  
  it('should contain Text in the header', async () => {
    // Arrange
    const page = new Page(driver);

    // Act
    await page.open();

    // Assert
    expect(await page.getHeaderText()).toBe('Something');
  });

  afterEach(async () => {
    if (!passed) takeScreenshot();
    await driver.quit();
  });
});

有了茉莉花，我会做这样的事情:

With jasmine I would do something like:

  var passed = jasmine.getEnv().currentSpec.results().passed();

但我找不到 Jest 类似的东西.也许还有另一种解决方案，例如对每个失败的期望进行截图?我尝试了一个 try/catch 周围的期望，但测试总是通过...

But I cannot find something similar for Jest. Maybe there is another solution like taking a screenshot on each failing expect? I tried a try/catch around the expect, but then the test always passes...

如果我的测试在 afterEach 中失败，我该如何检查 Jest?

How can I check with Jest if my test failed in the afterEach?

推荐答案

好像jasmine对象可以用在Jest测试中，但是currentSpec已经在2.x版本中去掉了.

Seems the jasmine object can be used in Jest tests, but the currentSpec has been removed in the 2.x version.

我找到了使用 jasmine 自定义报告的替代方法.只需确保您也将 driver.quit() 移至报告器，因为您可能在测试后仍需要驱动程序.

I have found an alternative with the use of jasmine custom reports. Just make sure you also move the driver.quit() to the reporter as you might still need the driver after the test.

以下是报告者在测试结束时处理失败测试的简单示例:

Here is an simple example for the reporter handling failing tests at the end of the test:

const reporter = {
  specDone: async (result) => {
    if (result.status === 'failed') {
      takeScreenshot(result.description);
    }
    await driver.quit();
  },
};

jasmine.getEnv().addReporter(reporter);

describe('Page', () => {  
  it('should contain Text in the header', async () => {
    // Arrange
    const page = new Page(driver);

    // Act
    await page.open();

    // Assert
    expect(await page.getHeaderText()).toBe('Something');
  });
});

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