Describe "Start-Process" -Tags @("CI","SLOW") {

    BeforeAll {
        $isNanoServer = [System.Management.Automation.Platform]::IsNanoServer
        $isIot = [System.Management.Automation.Platform]::IsIoT
        $isFullWin = $IsWindows -and !$isNanoServer -and !$isIot

        $pingCommand = (Get-Command -CommandType Application ping)[0].Definition
        $pingDirectory = Split-Path $pingCommand -Parent
        $tempFile = Join-Path -Path $TestDrive -ChildPath PSTest
        $assetsFile = Join-Path -Path (Join-Path -Path $PSScriptRoot -ChildPath assets) -ChildPath SortTest.txt
        if ($IsWindows) {
	        $pingParam = "-n 2 localhost"
        }
        elseif ($IsLinux -Or $IsOSX) {
	        $pingParam = "-c 2 localhost"
        }
    }

    # Note that ProcessName may still be `powershell` due to dotnet/corefx#5378
    # This has been fixed on Linux, but not on OS X

    It "Should process arguments without error" {
	    $process = Start-Process ping -ArgumentList $pingParam -PassThru -RedirectStandardOutput "$TESTDRIVE/output"

	    $process.Length      | Should Be 1
	    $process.Id          | Should BeGreaterThan 1
	    # $process.ProcessName | Should Be "ping"
    }

    It "Should work correctly when used with full path name" {
	    $process = Start-Process $pingCommand -ArgumentList $pingParam -PassThru -RedirectStandardOutput "$TESTDRIVE/output"

	    $process.Length      | Should Be 1
	    $process.Id          | Should BeGreaterThan 1
	    # $process.ProcessName | Should Be "ping"
    }

    It "Should invoke correct path when used with FilePath argument" {
	    $process = Start-Process -FilePath $pingCommand -ArgumentList $pingParam -PassThru -RedirectStandardOutput "$TESTDRIVE/output"

	    $process.Length      | Should Be 1
	    $process.Id          | Should BeGreaterThan 1
	    # $process.ProcessName | Should Be "ping"
    }

    It "Should wait for command completion if used with Wait argument" {
	    $process = Start-Process ping -ArgumentList $pingParam -Wait -PassThru -RedirectStandardOutput "$TESTDRIVE/output"
    }

    It "Should work correctly with WorkingDirectory argument" {
	    $process = Start-Process ping -WorkingDirectory $pingDirectory -ArgumentList $pingParam -PassThru -RedirectStandardOutput "$TESTDRIVE/output"

	    $process.Length      | Should Be 1
	    $process.Id          | Should BeGreaterThan 1
	    # $process.ProcessName | Should Be "ping"
    }

    It "Should handle stderr redirection without error" {
	    $process = Start-Process ping -ArgumentList $pingParam -PassThru -RedirectStandardError $tempFile -RedirectStandardOutput "$TESTDRIVE/output"

	    $process.Length      | Should Be 1
	    $process.Id          | Should BeGreaterThan 1
	    # $process.ProcessName | Should Be "ping"
    }

    It "Should handle stdout redirection without error" {
	    $process = Start-Process ping -ArgumentList $pingParam -Wait -RedirectStandardOutput $tempFile
	    $dirEntry = get-childitem $tempFile
	    $dirEntry.Length | Should BeGreaterThan 0
    }

    # Marking this test 'pending' to unblock daily builds. Filed issue : https://github.com/PowerShell/PowerShell/issues/2396
    It "Should handle stdin redirection without error" -Pending {
	    $process = Start-Process sort -Wait -RedirectStandardOutput $tempFile -RedirectStandardInput $assetsFile
	    $dirEntry = get-childitem $tempFile
	    $dirEntry.Length | Should BeGreaterThan 0
    }

    ## -Verb is supported in PowerShell core on Windows full desktop.
    It "Should give an error when -Verb parameter is used" -Skip:$isFullWin {
        { Start-Process -Verb runas -FilePath $pingCommand } | ShouldBeErrorId "NotSupportedException,Microsoft.PowerShell.Commands.StartProcessCommand"
    }

    ## -WindowStyle is supported in PowerShell core on Windows full desktop.
    It "Should give an error when -WindowStyle parameter is used" -Skip:$isFullWin {
        { Start-Process -FilePath $pingCommand -WindowStyle Normal } | ShouldBeErrorId "NotSupportedException,Microsoft.PowerShell.Commands.StartProcessCommand"
    }

    It "Should give an error when both -NoNewWindow and -WindowStyle are specified" -Skip:(!$isFullWin) {
        { Start-Process -FilePath $pingCommand -NoNewWindow -WindowStyle Normal -ErrorAction Stop } | ShouldBeErrorId "InvalidOperationException,Microsoft.PowerShell.Commands.StartProcessCommand"
    }

    It "Should start cmd.exe with Verb 'open' and WindowStyle 'Minimized'" -Skip:(!$isFullWin) {
        $fileToWrite = Join-Path $TestDrive "VerbTest.txt"
        $process = Start-Process cmd.exe -ArgumentList "/c echo abc > $fileToWrite" -Verb open -WindowStyle Minimized -PassThru
        $process.Name | Should Be "cmd"
        $process.WaitForExit()
        Test-Path $fileToWrite | Should Be $true
    }

    It "Should start notepad.exe with ShellExecute" -Skip:(!$isFullWin) {
        $process = Start-Process notepad -PassThru -WindowStyle Normal
        $process.Name | Should Be "notepad"
        $process | Stop-Process
    }

    It "Should open the application that associates with extension '.txt'" -Skip:(!$isFullWin) {
        $txtFile = Join-Path $TestDrive "TxtTest.txt"
        New-Item $txtFile -ItemType File -Force
        $process = Start-Process $txtFile -PassThru -WindowStyle Normal
        $process.Name | Should Not BeNullOrEmpty
        $process.Id | Should BeGreaterThan 1
        $process | Stop-Process
    }

    Remove-Item -Path $tempFile -Force
}