powershell - 如何测试解析的参数集？

Question

我正在尝试编写一个基本的Pester测试，以检查已解决参数集的“高级”功能:

function Do-Stuff
{
    [CmdletBinding(DefaultParameterSetName='Set 1')]
    [OutputType([String])]

    Param
    (
        [Parameter(ParameterSetName='Set 1')] 
        [switch]
        $S1,

        [Parameter(ParameterSetName='Set 2')]
        [switch]
        $S2
    )

    $PSBoundParameters |select -ExpandProperty Keys
}

Describe Do-Stuff {
    It 'Returns "S2" when switch "S2" is set' {
        $actual = Do-Stuff -S2 
        $expexted = 'S2'
        $actual |Should Be $expexted
    }

    # How to test the resolved parameter set?
    It 'The resolved parameter set is "Set 2" when switch "S2" is set' { 
        $actual = 'What to do here?' # I'm lost ;(
        $expexted = 'Set 2'
        $actual |Should Be $expexted
    }
}

谢谢因为我是Pester的新手，所以任何建议都将不胜感激。 ...在豪华和一般编码方面也没有什么好:D

Answer 1

以下将测试您是否对参数S2使用“设置2”:

Describe Do-Stuff {
    $Command = Get-Command 'Do-Stuff'

    It 'Returns "S2" when switch "S2" is set' {
        $actual = Do-Stuff -S2 
        $expexted = 'S2'
        $actual |Should Be $expexted
    }

# How to test the resolved parameter set?
    It 'The resolved parameter set is "Set 2" when switch "S2" is set' { 
        $actual = $Command.Parameters["S2"].ParameterSets.Keys
        $expexted = 'Set 2'
        $actual |Should Be $expexted
        # when you use several sets for parameters
        $expexted -contains $actual | should Be $true
   }

}

跟踪powershell是否实际上在执行“set 2”(设置为2)，而不是进行虫害测试的主题...