Have ErrorVariable populated through a Mock

errorvariablemock.ps1

Mock -CommandName Get-SomeCommand -MockWith {
    param (
        $ErrorVariable
    )
    $errorRecord = [System.Management.Automation.ErrorRecord]::new(
        [System.Exception]::new('Failed!'),
        'Error',
        [System.Management.Automation.ErrorCategory]::InvalidOperation,
        $null
    )
    Set-Variable -Name $ErrorVariable -Value $errorRecord -Scope 3
}

This is what I came up with when testing a command that threw a non terminating error which populated ErrorVariable that changed the code flow. By having the mock setup like this, the ErrorVariable passed in is actually set.