PowerShell/test/powershell/Write-Verbose.Tests.ps1

Describe "Write-Verbose" {
    It "Should be able to call cmdlet without error" {
        { Write-Verbose -Message "test" -ErrorAction SilentlyContinue } | Should Not Throw
    }

    It "Should not display verbose output by default" {
        $VerbosePreference | Should Be SilentlyContinue

        Write-Verbose -Message "test" | Should BeNullOrEmpty
    }

    It "Should be able to set verbose output to display by changing the `$VerbosePreference automatic variable" {
        $VerbosePreference = "Continue"

        Write-Verbose -Message "test" 4>&1 | Should Not BeNullOrEmpty

        $VerbosePreference = "SilentlyContinue"
    }

    It "Should be able to set verbose output to display by using the verbose switch" {
        Write-Verbose -Message "test" -Verbose 4>&1 | Should Be "test"
    }

    It "Should be able to set verbose switch using a colon and boolean" {
        { Write-Verbose -Message "test" -Verbose:$false } | Should Not Throw

        $(Write-Verbose -Message "test" -Verbose:$true) 4>&1 | Should Be "test"
    }
}