Describe 'native commands with pipeline' -tags 'Feature' {

    BeforeAll {
        $powershell = Join-Path -Path $PsHome -ChildPath "powershell"
    }

    It "native | ps | native doesn't block" {
        $iss = [initialsessionstate]::CreateDefault2();
        $rs = [runspacefactory]::CreateRunspace($iss)
        $rs.Open()

        $ps = [powershell]::Create()
        $ps.Runspace = $rs

        $ps.AddScript("& $powershell -noprofile -command '100;
            Start-Sleep -Seconds 100' |
            %{ if (`$_ -eq 100) { 'foo'; exit; }}").BeginInvoke()

        # waiting 30 seconds, because powershell startup time could be long on the slow machines,
        # such as CI
        Wait-UntilTrue { $rs.RunspaceAvailability -eq 'Available' } -timeout 30000 -interval 100 | Should Be $true

        $ps.Stop()
        $rs.ResetRunspaceState()
    }

    # Make this test pending because of too many regressions in the latest .NET Core
    # and thus we have to get back to an older .NET Core.
    It "native | native | native should work fine" -Pending {

        if ($IsWindows) {
            $result = @(ping.exe | findstr.exe count | findstr.exe ping)
            $result[0] | Should Match "Usage: ping"
        } else {
            $result = @(ps aux | grep powershell | grep -v grep)
            $result[0] | Should Match "powershell"
        }
    }
}

Describe "Native Command Processor" -tags "Feature" {

    # If powershell receives a StopProcessing, it should kill the native process and all child processes
    # this test should pass and no longer Pending when #2561 is fixed
    It "Should kill native process tree" -Pending {

        # make sure no test processes are running
        Get-Process testexe -ErrorAction SilentlyContinue | Stop-Process

        [int] $numToCreate = 2

        $ps = [PowerShell]::Create().AddCommand("testexe")
        $ps.AddArgument("-createchildprocess")
        $ps.AddArgument($numToCreate)
        $async = $ps.BeginInvoke()
        $ps.InvocationStateInfo.State | Should Be "Running"

        [bool] $childrenCreated = $false
        while (-not $childrenCreated)
        {
            $childprocesses = Get-Process testexe -ErrorAction SilentlyContinue
            if ($childprocesses.count -eq $numToCreate+1)
            {
                $childrenCreated = $true
            }
        }

        $startTime = Get-Date
        $beginsync = $ps.BeginStop($null, $async)
        # wait no more than 5 secs for the processes to be terminated, otherwise test has failed
        while (((Get-Date) - $startTime).TotalSeconds -lt 5)
        {
            if (($childprocesses.hasexited -eq $true).count -eq $numToCreate+1)
            {
                break
            }
        }
        $childprocesses = Get-Process testexe
        $count = $childprocesses.count
        $childprocesses | Stop-Process
        $count | Should Be 0
    }

    It "Should not block running Windows executables" -Skip:(!$IsWindows -or !(Get-Command notepad.exe)) {
        function FindNewNotepad
        {
            Get-Process -Name notepad -ErrorAction Ignore | Where-Object { $_.Id -notin $dontKill }
        }

        # We need to kill the windows process we start and can't know the process id, so get a list of
        # notepad processes already running and don't kill any of those.
        $dontKill = Get-Process -Name notepad -ErrorAction Ignore | ForEach-Object { $_.Id }

        try
        {
            $ps = [powershell]::Create().AddScript('notepad.exe; "ran notepad"')
            $async = $ps.BeginInvoke()

            # Wait for up to 30 seconds for either the pipeline to finish (should mean the test succeeded) or
            # for a new instance of notepad to have started (which mean we're blocked)
            $counter = 0
            while (!$async.AsyncWaitHandle.WaitOne(10000) -and $counter -lt 3 -and !(FindNewNotepad))
            {
                $counter++
            }

            # Stop the new instance of notepad
            $newNotepad = FindNewNotepad
            $newNotepad | Should Not Be $null
            $newNotepad | Stop-Process

            $async.IsCompleted | Should Be $true
            $ps.EndInvoke($async) | Should Be "ran notepad"
        }
        finally
        {
            if (!$async.IsCompleted)
            {
                $ps.Stop()
            }
            $ps.Dispose()
        }
    }

}