. $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 "Test-IsOverflowServer" {
    
    Mock -ModuleName $moduleForMock -CommandName Write-Warning -MockWith { }
    Mock -ModuleName $moduleForMock -CommandName Test-IsAws -MockWith { return $true }
    Mock -ModuleName $moduleForMock -CommandName Get-LogLeadName -MockWith { return "[UUT]" }

    Context "Successfull call of Get-CurrentInstanceTags" {

        It "Returns `$true for Overflow Tag on Overflow server" {
            Mock -ModuleName $moduleForMock -CommandName Get-CurrentInstanceTags -MockWith { return "true" }
            Test-IsOverflowServer | Should Be $true
            Assert-MockCalled -ModuleName $inScopeModuleForAssert -CommandName Get-CurrentInstanceTags -Times 1 -Exactly -Scope It
        }

        It "Returns `$false for Overflow Tag on a non-Overflow server" {
            Mock -ModuleName $moduleForMock -CommandName Get-CurrentInstanceTags -MockWith { return }
            Test-IsOverflowServer | Should Be $false
            Assert-MockCalled -ModuleName $inScopeModuleForAssert -CommandName Get-CurrentInstanceTags -Times 1 -Exactly -Scope It
        }
    }

    Context "Failed call of Get-CurrentInstanceTags" {

        It "Calls Write-Warning when failling to retrieve tags" {
            Mock -ModuleName $moduleForMock -CommandName Get-CurrentInstanceTags -MockWith { throw "Generic Error" }
            Test-IsOverflowServer
            Assert-MockCalled -ModuleName $inScopeModuleForAssert -CommandName Write-Warning -Times 1 -Exactly -Scope It
        }

    }
}