Koans/Introduction/AboutBooleans.Koans.ps1
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using module PSKoans [Koan(Position = 102)] param() <# Booleans Booleans in PowerShell are either True or False, 1 or 0, on or off. They allow us to represent a logical, binary, state of being. "Can I stop this service?" The answer is yes or no. Therefore, the CanStop property for a System.ServiceProcess.ServiceController object is a Boolean, abbreviated to bool. In other words, the only possible responses we have to the question, "Can I stop this service?" are either "yes" or "no". Check for yourself by running the following code: Get-Service | Get-Member Then scroll down till you see the "CanStop" property: CanStop Property bool CanStop {get;} There are only two possible values for a boolean: $true and $false #> Describe "Booleans" { # Using only booleans, so either $true or $false, fill in the blanks below. It '( 1 -gt 2 ) is either true or false' { $____ | Should -Be ( 1 -gt 2 ) -Because '1 is not greater than 2' } It '( 1 -lt 2 ) is either true or false' { $____ | Should -Be ( 1 -lt 2 ) -Because '1 is less than 2' } It '( 10 -lt 20 ) is either true or false' { $____ | Should -Be ( 10 -lt 20 ) -Because '10 is less than 20' } It '( 10 -gt 20 ) is either true or false' { $____ | Should -Be ( 10 -gt 20 ) -Because 'The lesser is not greater' } It '( 3 -eq 3 ) is either true or false' { $____ | Should -Be ( 3 -eq 3 ) -Because 'A mirror reflects true' } It '( 100 -lt 1 ) is either true or false' { $____ | Should -Be ( 100 -lt 1 ) -Because '100 is not less than 1' } } |