New-Fixture.Tests.ps1

Set-StrictMode -Version Latest

Describe "New-Fixture" {
    It "Name parameter is mandatory:" {
        (get-command New-Fixture ).Parameters.Name.ParameterSets.__AllParameterSets.IsMandatory | Should Be $true
    }

    Context "Only Name parameter is specified:" {
        It "Creates fixture in current directory:" {
            $name = "Test-Fixture"
            $path = "TestDrive:\"

            pushd  $path
            New-Fixture -Name $name | Out-Null
            popd

            Join-Path -Path $path -ChildPath "$name.ps1" | Should Exist
            Join-Path -Path $path -ChildPath "$name.Tests.ps1" | Should Exist
        }
    }

    Context "Name and Path parameter is specified:" {
        #use different fixture names to avoid interference among the test cases
        #claning up would be also possible, but difficult if the assertion fails
        It "Creates fixture in full Path:" {
            $name = "Test-Fixture"
            $path = "TestDrive:\full"

            New-Fixture -Name $name -Path $path | Out-Null

            Join-Path -Path $path -ChildPath "$name.ps1" | Should Exist
            Join-Path -Path $path -ChildPath "$name.Tests.ps1" | Should Exist

            #cleanup
            Join-Path -Path "$path" -ChildPath "$name.ps1" | Remove-Item -Force
            Join-Path -Path "$path" -ChildPath "$name.Tests.ps1" | Remove-Item -Force
        }

        It "Creates fixture in relative Path:" {
            $name = "Relative1-Fixture"
            $path = "TestDrive:\"

            pushd  $path
            New-Fixture -Name $name -Path relative | Out-Null
            popd

            Join-Path -Path "$path\relative" -ChildPath "$name.ps1" | Should Exist
            Join-Path -Path "$path\relative" -ChildPath "$name.Tests.ps1" | Should Exist
        }
        It "Creates fixture if Path is set to '.':" {
            $name = "Relative2-Fixture"
            $path = "TestDrive:\"

            pushd  $path
            New-Fixture -Name $name -Path . | Out-Null
            popd

            Join-Path -Path "$path" -ChildPath "$name.ps1" | Should Exist
            Join-Path -Path "$path" -ChildPath "$name.Tests.ps1" | Should Exist
        }
        It "Creates fixture if Path is set to '(pwd)':" {
            $name = "Relative3-Fixture"
            $path = "TestDrive:\"

            pushd  $path
            New-Fixture -Name $name -Path (pwd) | Out-Null
            popd

            Join-Path -Path "$path" -ChildPath "$name.ps1" | Should Exist
            Join-Path -Path "$path" -ChildPath "$name.Tests.ps1" | Should Exist
        }
        It "Writes warning if file exists" {
            $name = "Warning-Fixture"
            $path = "TestDrive:\"

            Mock -Verifiable -ModuleName Pester Write-Warning { }

            #Create the same files twice
            New-Fixture -Name $name -Path $path | Out-Null
            New-Fixture -Name $name -Path $path -WarningVariable warnings -WarningAction SilentlyContinue | Out-Null

            Assert-VerifiableMocks
        }

    }
    #TODO add tests that validate the contents of default files
}