javascript - 使用异步命令 Chai 断言不会失败？

Question

使用以下异步命令时，我的 Chai 断言似乎没有失败:

async confirmSuccessfulSubmission() {
    try {
        let value = await $("#contact_reply h1").getText()
        if(value)
           return expect(value).to.equal("Thank You for your Message!2"); 
        return null
        } catch(e) {
            console.log(e)
        } 
}

异常消息输出到控制台窗口:

[0-0] { AssertionError: expected 'Thank You for your Message!' to equal 'Thank You for your Message!2'
    at ContactUs_Page.confirmSuccessfulSubmission (C:\Users\GBruno\Desktop\webdriverioFramework\pageObjects\ContactUs_Page.js:51:34)
    at <anonymous>
    at process._tickDomainCallback (internal/process/next_tick.js:229:7)
  message: 'expected \'Thank You for your Message!\' to equal \'Thank You for your Message!2\'',
  showDiff: true,
  actual: 'Thank You for your Message!',
  expected: 'Thank You for your Message!2' }

Answer 1

为了让你的测试失败，测试运行程序(我假设它是 webdriverio)必须收到一个 AssertionError。在您的测试中，chai 将在这一行中抛出错误:

expect(value).to.equal("Thank You for your Message!2");

但你在这里明白了:

catch(e) {
        console.log(e)
    } 

因此它永远不会到达测试运行程序，测试也不会失败。请尝试使用以下代码:

async confirmSuccessfulSubmission() {
try {
    let value = await $("#contact_reply h1").getText()
    expect(value).to.equal("Thank You for your Message!2"); 
    } catch(e) {
        console.log(e)
        throw(e)
    } 
}

或者如果您不需要打印错误:

async confirmSuccessfulSubmission() {
    let value = await $("#contact_reply h1").getText()
    expect(value).to.equal("Thank You for your Message!2"); 
}