Mock using Closure

Closure.Tests.ps1

Describe "a" {
    It "b" {
        function a () {}
 
        $closure = & {
            $state = @{
                Value = 0
            }

            {        
                if ($state.Value -eq 0)
                {
                    # This is first call
                    $mockReturnValue = @{
                        Ensure = 'Absent'
                    }
                }
                else
                {
                    # This is subsequent call
                    $mockReturnValue = @{
                        Ensure = 'Present'
                    }
                }

                $state.Value++

                return $mockReturnValue
            }.GetNewClosure()
        }

        Mock a -MockWith $closure
        
        $result = a 
        $result.Ensure | Should -Be 'Absent'
        $result = a 
        $result.Ensure | Should -Be 'Present'
    }
}