Tests/Unit/MSFT_xADObjectPermissionEntry.Tests.ps1

$Global:DSCModuleName   = 'xActiveDirectory'
$Global:DSCResourceName = 'MSFT_xADObjectPermissionEntry'

#region HEADER
[String] $moduleRoot = Split-Path -Parent (Split-Path -Parent (Split-Path -Parent $Script:MyInvocation.MyCommand.Path))
Write-Host $moduleRoot -ForegroundColor Green;
if ( (-not (Test-Path -Path (Join-Path -Path $moduleRoot -ChildPath 'DSCResource.Tests'))) -or `
     (-not (Test-Path -Path (Join-Path -Path $moduleRoot -ChildPath 'DSCResource.Tests\TestHelper.psm1'))) )
{
    & git @('clone','https://github.com/PowerShell/DscResource.Tests.git',(Join-Path -Path $moduleRoot -ChildPath '\DSCResource.Tests\'))
}

Import-Module (Join-Path -Path $moduleRoot -ChildPath 'DSCResource.Tests\TestHelper.psm1') -Force
$TestEnvironment = Initialize-TestEnvironment `
    -DSCModuleName $Global:DSCModuleName `
    -DSCResourceName $Global:DSCResourceName `
    -TestType Unit
#endregion

function Invoke-TestSetup { }

function Invoke-TestCleanup {
    Restore-TestEnvironment -TestEnvironment $TestEnvironment
}

# Begin Testing
try
{
    Invoke-TestSetup

    InModuleScope $Global:DSCResourceName {

        #region Pester Test Initialization
        $testDefaultParameters = @{
            Path                               = 'CN=PC01,CN=Computers,DC=contoso,DC=com'
            IdentityReference                  = 'CONTOSO\User'
            AccessControlType                  = 'Allow'
            ObjectType                         = '00000000-0000-0000-0000-000000000000'
            ActiveDirectorySecurityInheritance = 'None'
            InheritedObjectType                = '00000000-0000-0000-0000-000000000000'
        }
        $testPresentParameters = @{
            Ensure                             = 'Present'
            ActiveDirectoryRights              = 'GenericAll'
        }
        $testAbsentParameters = @{
            Ensure                             = 'Absent'
            ActiveDirectoryRights              = 'GenericAll'
        }
        $mockGetAclPresent = {
            $mock = [PSCustomObject] @{
                Path   = 'Microsoft.ActiveDirectory.Management\ActiveDirectory:://RootDSE/CN=PC01,CN=Computers,DC=contoso,DC=com'
                Owner  = 'BUILTIN\Administrators'
                Access = @(
                    [PSCustomObject] @{
                        ActiveDirectoryRights = 'GenericAll'
                        InheritanceType       = 'None'
                        ObjectType            = [System.Guid] '00000000-0000-0000-0000-000000000000'
                        InheritedObjectType   = [System.Guid] '00000000-0000-0000-0000-000000000000'
                        ObjectFlags           = 'None'
                        AccessControlType     = 'Allow'
                        IdentityReference     = [PSCustomObject] @{ Value = 'CONTOSO\User' }
                        IsInherited           = $false
                        InheritanceFlags      = 'None'
                        PropagationFlags      = 'None'
                    }
                )
            }
            $mock | Add-Member -MemberType 'ScriptMethod' -Name 'AddAccessRule' -Value {}
            $mock | Add-Member -MemberType 'ScriptMethod' -Name 'RemoveAccessRule' -Value {}
            return $mock
        }
        $mockGetAclAbsent = {
            $mock = [PSCustomObject] @{
                Path   = 'Microsoft.ActiveDirectory.Management\ActiveDirectory:://RootDSE/CN=PC,CN=Computers,DC=lab,DC=local'
                Owner  = 'BUILTIN\Administrators'
                Access = @()
            }
            $mock | Add-Member -MemberType 'ScriptMethod' -Name 'AddAccessRule' -Value {}
            $mock | Add-Member -MemberType 'ScriptMethod' -Name 'RemoveAccessRule' -Value {}
            return $mock
        }
        #endregion

        #region Function Get-TargetResource
        Describe "$($Global:DSCResourceName)\Get-TargetResource" {

            Mock -CommandName 'Import-Module' -ParameterFilter { $Name -eq 'ActiveDirectory' } -MockWith { }

            Context 'When the desired ace is present' {

                Mock -CommandName 'Get-Acl' -MockWith $mockGetAclPresent

                It 'Should return a "System.Collections.Hashtable" object type' {
                    # Act
                    $targetResource = Get-TargetResource @testDefaultParameters -Verbose

                    # Assert
                    $targetResource | Should BeOfType [System.Collections.Hashtable]
                }

                It 'Should return a valid result if the ace is present' {
                    # Act
                    $targetResource = Get-TargetResource @testDefaultParameters -Verbose

                    # Assert
                    $targetResource.Ensure                             | Should Be 'Present'
                    $targetResource.Path                               | Should Be $testDefaultParameters.Path
                    $targetResource.IdentityReference                  | Should Be $testDefaultParameters.IdentityReference
                    $targetResource.ActiveDirectoryRights              | Should Be 'GenericAll'
                    $targetResource.AccessControlType                  | Should Be $testDefaultParameters.AccessControlType
                    $targetResource.ObjectType                         | Should Be $testDefaultParameters.ObjectType
                    $targetResource.ActiveDirectorySecurityInheritance | Should Be $testDefaultParameters.ActiveDirectorySecurityInheritance
                    $targetResource.InheritedObjectType                | Should Be $testDefaultParameters.InheritedObjectType
                }
            }

            Context 'When the desired ace is absent' {

                Mock -CommandName 'Get-Acl' -MockWith $mockGetAclAbsent

                It 'Should return a valid result if the ace is absent' {
                    # Act
                    $targetResource = Get-TargetResource @testDefaultParameters -Verbose

                    # Assert
                    $targetResource.Ensure                             | Should Be 'Absent'
                    $targetResource.Path                               | Should Be $testDefaultParameters.Path
                    $targetResource.IdentityReference                  | Should Be $testDefaultParameters.IdentityReference
                    $targetResource.ActiveDirectoryRights              | Should Be ''
                    $targetResource.AccessControlType                  | Should Be $testDefaultParameters.AccessControlType
                    $targetResource.ObjectType                         | Should Be $testDefaultParameters.ObjectType
                    $targetResource.ActiveDirectorySecurityInheritance | Should Be $testDefaultParameters.ActiveDirectorySecurityInheritance
                    $targetResource.InheritedObjectType                | Should Be $testDefaultParameters.InheritedObjectType
                }
            }
        }
        #endregion

        #region Function Test-TargetResource
        Describe "$($Global:DSCResourceName)\Test-TargetResource" {

            Mock -CommandName 'Import-Module' -ParameterFilter { $Name -eq 'ActiveDirectory' } -MockWith { }

            Context 'When he desired ace is present' {

                Mock -CommandName 'Get-Acl' -MockWith $mockGetAclPresent

                It 'Should return a "System.Boolean" object type' {
                    # Act
                    $targetResource = Test-TargetResource @testDefaultParameters @testPresentParameters

                    # Assert
                    $targetResource | Should BeOfType [System.Boolean]
                }

                It 'Should return $true if the ace desired state is present' {
                    # Act
                    $targetResource = Test-TargetResource @testDefaultParameters @testPresentParameters -Verbose

                    # Assert
                    $targetResource | Should Be $true
                }

                It 'Should return $false if the ace desired state is absent' {
                    # Act
                    $targetResource = Test-TargetResource @testDefaultParameters @testAbsentParameters

                    # Assert
                    $targetResource | Should Be $false
                }
            }

            Context 'When the desired ace is absent' {

                Mock -CommandName 'Get-Acl' -MockWith $mockGetAclAbsent

                It 'Should return $false if the ace desired state is present' {
                    # Act
                    $targetResource = Test-TargetResource @testDefaultParameters @testPresentParameters

                    # Assert
                    $targetResource | Should Be $false
                }

                It 'Should return $true if the ace desired state is absent' {
                    # Act
                    $targetResource = Test-TargetResource @testDefaultParameters @testAbsentParameters

                    # Assert
                    $targetResource | Should Be $true
                }
            }
        }
        #endregion

        #region Function Set-TargetResource
        Describe "$($Global:DSCResourceName)\Set-TargetResource" {

            Mock -CommandName 'Import-Module' -ParameterFilter { $Name -eq 'ActiveDirectory' } -MockWith { }

            Context 'When the desired ace is present' {

                Mock -CommandName 'Get-Acl' -MockWith $mockGetAclPresent
                Mock -CommandName 'Set-Acl' -MockWith { } -Verifiable

                It 'Should remove the ace from the existing acl' {
                    # Act
                    Set-TargetResource @testDefaultParameters @testAbsentParameters

                    # Assert
                    Assert-MockCalled -CommandName 'Set-Acl' -Scope It -Times 1 -Exactly
                }
            }

            Context 'When the desired ace is absent' {

                Mock -CommandName 'Get-Acl' -MockWith $mockGetAclAbsent
                Mock -CommandName 'Set-Acl' -MockWith { } -Verifiable

                It 'Should add the ace to the existing acl' {
                    # Act
                    Set-TargetResource @testDefaultParameters @testPresentParameters

                    # Assert
                    Assert-MockCalled -CommandName 'Set-Acl' -Scope It -Times 1 -Exactly
                }
            }
        }
    }
}
finally
{
    Invoke-TestCleanup
}