. $PSScriptRoot\..\..\Load-PesterModules.ps1
$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.tests\.', '.'
$global:functionPath = Join-Path -Path $here -ChildPath $sut

InModuleScope -ModuleName Alkami.DevOps.SystemEngineering -ScriptBlock {
    Write-Host "InModuleScope - Overriding SUT: $global:functionPath"
    Import-Module $global:functionPath -Force

    Describe "Get-AlkamiIamAssumeRolePolicyString" {

        Context "Parameter Validation" {

            It "Throws if ServiceName is Null" {
                { Get-AlkamiIamAssumeRolePolicyString -ServiceName $null } | Should -Throw
            }

            It "Throws if ServiceName is Empty" {
                { Get-AlkamiIamAssumeRolePolicyString -ServiceName '' } | Should -Throw
            }
        }

        Context "Logic" {

            It "Returns a String" {

                (Get-Command Get-AlkamiIamAssumeRolePolicyString).OutputType.Type.ToString() | Should -BeExactly "System.String"
            }

            It "Returns a String With a Valid JSON Conversion" {

                { ConvertFrom-Json (Get-AlkamiIamAssumeRolePolicyString -ServiceName 'test') } | Should -Not -Throw
            }

            It "Appends '.amazonaws.com' If Not Provided" {

                $result = ConvertFrom-Json (Get-AlkamiIamAssumeRolePolicyString -ServiceName 'test')
                $result.Statement[0].Principal.Service | Should -BeExactly 'test.amazonaws.com'
            }

            It "Does Not Append '.amazonaws.com' If Provided" {

                $result = ConvertFrom-Json (Get-AlkamiIamAssumeRolePolicyString -ServiceName 'test.amazonaws.com')
                $result.Statement[0].Principal.Service | Should -BeExactly 'test.amazonaws.com'
            }
        }
    }
}