如何指定如果 Pester 断言失败该怎么办？

Question

如果你想说，1 应该等于 1，如果不等于 1，那么在 powershell 中使用 pester 避免代码重复最雄辩的方法是什么？

例如

{1 | should be 1} else {break}

而不是

1 | should be 1
if (1 -ne 1) {break}

Answer 1

目前没有用于在发生故障时中断测试执行的内置功能，但已在此处进行了讨论：https://github.com/pester/Pester/issues/360以及一些解决方法，例如这个:

BeforeEach {
    $FailedCount =  InModuleScope -ModuleName Pester { $Pester.FailedCount }

    if ($FailedCount -gt 0) {
        Set-ItResult -Skipped -Because 'previous test failed'
    }
}

另一种选择可能是将测试分解为几个不同的 Pester 脚本。然后，您可以进行一些高级或初始测试，首先检查它们是否成功，如果它们未全部通过，则跳过其余测试脚本的执行。

例如：

$Failed = (Invoke-Pester -Path First.tests.ps1 -PassThru).FailedCount

If ($Failed -eq 0) {
    Invoke-Pester -Path Second.tests.ps1
    ..
}

Answer 2

现在有内置功能

https://github.com/pester/Pester/pull/2023

$pesterConfig = New-PesterConfiguration
$pesterConfig.Run.Container = @((New-PesterContainer -Path C:\Users\Armaan\Documents\powershell-dev\sample.Tests.ps1), (New-PesterContainer -Path C:\Users\Armaan\Documents\powershell-dev\sample2.Tests.ps1))
$pesterConfig.Output.Verbosity = "Detailed"

$pesterConfig.Run.SkipRemainingOnFailure = 'Run'
Invoke-Pester -Configuration $pesterConfig

Answer 3

我来到这里寻找一种方法来使一个测试依赖于另一个测试。

#Dependency in Pester v3.4.0
Describe 'testing pester' {
   $dep = @{}
   context 'when in here' {
      It 'when the independent test fails' {
         $dep.aSpecificDependency = 'failed'

         'a' | should be 'b'

         $dep.aSpecificDependency = 'passed'
      }
      
      It 'then the dependent test is inconclusive' {
         if(-not $dep.ContainsKey('aSpecificDependency')){
            Set-TestInconclusive -Message 'aSpecificDependency did not run.'
         }elseif($dep.aSpecificDependency -ne 'passed'){
            Set-TestInconclusive -Message 'aSpecificDependency did not pass.'
         }
         'a' | should be 'a'
      }

      It 'it is also inconclusive when the independent has not yet been performed.' {
         if(-not $dep.ContainsKey('aDifferentDependency')){
            Set-TestInconclusive -Message 'aDifferentDependency did not run.'
         }elseif($dep.aDifferentDependency -ne 'passed'){
            Set-TestInconclusive -Message 'aDifferentDependency did not pass.'
         }
         'a' | should be 'a'
      }
      
      if($dep.ContainsKey('aSpecificDependency') -and $dep.aSpecificDependency -ne 'passed'){
         return
      }

      It 'stops before running this one' {
         'a' | should be 'a'
      }
   }

   context 'when looking at another section' {
      It 'goes fine' {
         'a' | should be 'a'
      }
   }

   if($dep.ContainsKey('aSpecificDependency') -and $dep.aSpecificDependency -ne 'passed'){
      return
   }
   context 'when looking at another section' {
      It 'or you could stop on that too' {
         'a' | should be 'a'
      }
   }
}