. $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 = ""

#region Add-HostsFileContent

Describe "Add-HostsFileContent" {
    Mock -CommandName Write-Warning {} -ModuleName $moduleForMock

    Context "When an existing IP address is supplied" {

        Mock -CommandName Get-HostsFileContent {
            return @("127.0.0.1		foo.bar", "192.168.1.1		bar.foo")
        } -ModuleName $moduleForMock

        It "Writes a Warning" {
                Add-HostsFileContent "127.0.0.1			hello.world"
                Assert-MockCalled -CommandName "Write-Warning" -ParameterFilter {$Message -match "hosts entry already exists"} -ModuleName $ModuleToMock
        }

        It "Does Not Save the Hosts File" {

            Add-HostsFileContent "127.0.0.1			hello.world"

            $hostsFile = Get-HostsFileContent
            $hostsFile -match "hello.world" | Should -BeNullOrEmpty
        }
    }

    Context "When Valid Parameters are Supplied" {

        $tempPath = [System.IO.Path]::GetTempFileName()

        Mock -CommandName Get-HostsFileContent {

            return @("127.0.0.1			foo.bar", "192.168.1.1			bar.foo")
        } -ModuleName $moduleForMock

        It "Adds a Single Host Entry" {

            Add-HostsFileContent "10.10.10.10		Hello.World" $tempPath
            $content = Get-Content $tempPath

            $content -match "Hello.World" | Should -BeTrue
        }

        It "Adds Multiple Host Entries" {

            $mockContent = @("10.10.10.10		Hello.World", "9.9.9.9		No.Way.Jose")

            Add-HostsFileContent $mockContent $tempPath
            $content = Get-Content $tempPath

            $content -match "Hello.World" -and $content -match "No.Way.Jose" | Should -BeTrue
        }
    }
}

#endregion Add-HostsFileContent