. $PSScriptRoot\..\..\Load-PesterModules.ps1
$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.tests\.', '.'
$functionPath = Join-Path -Path $here -ChildPath $sut
Write-Host "Overriding SUT: $functionPath"
Import-Module $functionPath -Force
$moduleForMock = ""

Describe "Get-WindowsServiceApplicationName" {

    Mock -CommandName Write-Warning -MockWith {} -ModuleName $moduleForMock
    $fakeServiceName = -join ((65..90) + (97..122) | Get-Random -Count 15 | ForEach-Object {[char]$_})

    Context "Error Handling" {

        It "Does not throw if the service is not found" {

            { Get-WindowsServiceApplicationName "$fakeServiceName" } | Should -Not -Throw
            Assert-MockCalled -CommandName Write-Warning -Times 1 -Exactly -Scope It `
                -ModuleName $moduleForMock -ParameterFilter { $Message -match "Unable to find service detail" }
        }

        It "Does not throw if the service has no pathname property" {

            Mock -CommandName Get-CIMInstance -MockWith {

                return New-Object PSObject -Property @{ NoPathName="Here"; }
            } -ModuleName $moduleForMock

            { Get-WindowsServiceApplicationName "$fakeServiceName" } | Should -Not -Throw
            Assert-MockCalled -CommandName Get-CIMInstance -Times 1 -Exactly -Scope It -ModuleName $moduleForMock
            Assert-MockCalled -CommandName Write-Warning -Times 1 -Exactly -Scope It `
                -ModuleName $moduleForMock -ParameterFilter { $Message -match "Unable to find the property PathName" }
        }

        It "Returns one service if more than one matching service is found" {

            Mock -CommandName Get-CIMInstance -MockWith {

                @(
                    [PSCustomObject]@{
                        Name     = "FakeService";
                        PathName = "NoWay";
			        },
                    [PSCustomObject]@{
                        Name     = "FakeService2";
                        PathName = "NoHow";
			        }
                )

            } -ModuleName $moduleForMock

            Get-WindowsServiceApplicationName "$fakeServiceName" | Should -HaveCount 1

            Assert-MockCalled -CommandName Get-CIMInstance -Times 1 -Exactly -Scope It -ModuleName $moduleForMock
            Assert-MockCalled -CommandName Write-Warning -Times 1 -Exactly -Scope It `
                -ModuleName $moduleForMock -ParameterFilter { $Message -match "More than one service found" }
        }
    }

    Context "Happy Path" {

        It "Returns only the PathName property" {

            Mock -CommandName Get-CIMInstance -MockWith {

                [PSCustomObject]@{
                    Name     = "FakeService";
                    PathName = "HappyPath";
			    }

            } -ModuleName $moduleForMock

            Get-WindowsServiceApplicationName "$fakeServiceName" | Should -Be "HappyPath"
            Assert-MockCalled -CommandName Get-CIMInstance -Times 1 -Exactly -Scope It -ModuleName $moduleForMock
            Assert-MockCalled -CommandName Write-Warning -Times 0 -Exactly -Scope It -ModuleName $moduleForMock
        }
    }
}