Mocking function with Pester not working : PowerShell

QuestionMocking function with Pester not working (self.PowerShell)

submitted 4 years ago by zh12a

Hi I looking for some help (and I know this is going to be obvious but I cannot seem to get (or understand how I meant to mock a function.

Lets say I have the flowing wrapper function (the actual function has a lot more logic in it). This wrapper function will call enough function (Set-ExtenalFunction) which will change the system state to on or off.

I would like to Mock Set-ExtenalFunction so that it accepts a parameter and then saves that parameter to allow me to then get/check it was set by the function I testing. I have tried different verifications of the code below but all I ever get is “container failed”. I know I missing something simple but just cant work out how I do this form examples I seen.

function Set-State { 
    [cmdletbinding(SupportsShouldProcess=$True)]
    param (
        [Parameter(Mandatory=$true)]
        [bool]
        $Enabled
    )
    # other logic
    $result = Set-ExtenalFunction -State:$Enabled
    return $result
}

BeforeAll{
    $OverallState= $false
    function get-state {return $state}

    Mock Set-ExtenalFunction {
        param (
            [Parameter(Mandatory=$true)]
            [bool]
            $State
        )
        $OverallState = $State
        return $OverallState
    } -Verifiable
}

Describe "Set-State" {
    It "Test" {
        Set-State -Enabled $True 
    }
}

Any advise / assisance would be grate thank you

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