. $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 "Select-UniqueServerPackages" {

    function Get-PackageObject{
        param(
            $packageName,
            $packageVersion
        )

        $properties = @{ Name = $packageName; Version = $packageVersion; Feed = $null; Tags = $null; IsService = $null; StartMode = $null}
        $package = New-Object -TypeName PSObject -Prop $properties;

        return $package
    }

    Context "When Supplied Package Array Is Empty" {
        $packages = [System.Collections.ArrayList]::new()

        $uniquePackages = Select-UniqueServerPackages $packages

        It "Returns Null"{
            $uniquePackages | Should -Be $null
        }
    }

    Context "When Supplied Package Array Has a Single Entry" {
        $packages = [System.Collections.ArrayList]::new()

        $packageObject = Get-PackageObject -packageName "Alkami.FakeService1" -packageVersion "1.0.0"

        $packages.Add($packageObject)

        $uniquePackages = [array](Select-UniqueServerPackages $packages)

        It "Returns a Single Entry"{
            $uniquePackages.Count | Should -Be 1
        }
    }

    Context "When Supplied Duplicate Packages" {
        $packages = [System.Collections.ArrayList]::new()

        # Define 3 duplicate packages.
        $packageObject1 = Get-PackageObject -packageName "Alkami.FakeService1" -packageVersion "1.0.0"
        $packageObject2 = Get-PackageObject -packageName "Alkami.FakeService1" -packageVersion "1.0.0"
        $packageObject3 = Get-PackageObject -packageName "Alkami.FakeService1" -packageVersion "1.0.0"

        $packages.Add($packageObject1)
        $packages.Add($packageObject2)
        $packages.Add($packageObject3)

        $uniquePackages = [array](Select-UniqueServerPackages $packages)

        It "Returns Unique Entries"{
            $uniquePackages.Count | Should -Be 1
        }
    }

    Context "When Supplied Unique Pakcages"{
        $packages = [System.Collections.ArrayList]::new()

        $packageObject1 = Get-PackageObject -packageName "Alkami.FakeService1" -packageVersion "1.0.0"
        $packageObject2 = Get-PackageObject -packageName "Alkami.FakeService2" -packageVersion "1.0.0"
        $packageObject3 = Get-PackageObject -packageName "Alkami.FakeService3" -packageVersion "1.0.0"

        $packages.Add($packageObject1)
        $packages.Add($packageObject2)
        $packages.Add($packageObject3)

        $uniquePackages = [array](Select-UniqueServerPackages $packages)

        It "Returns All Entries"{
            $uniquePackages.Count | Should -Be 3
        }
    }
}