Adding isWindows to invoke item test and new test location

test/powershell/Modules/Microsoft.PowerShell.Utility/Invoke-Item.Tests.ps1

@@ -0,0 +1,76 @@
+using namespace System.Diagnostics
+
+Describe "Invoke-Item" {
+
+    $tmpDirectory         = $TestDrive
+    $testfile             = "testfile.txt"
+    $testfolder           = "newDirectory"
+    $testlink             = "testlink"
+    $FullyQualifiedFile   = Join-Path -Path $tmpDirectory -ChildPath $testfile
+    $FullyQualifiedFolder = Join-Path -Path $tmpDirectory -ChildPath $testfolder
+    $FullyQualifiedLink   = Join-Path -Path $tmpDirectory -ChildPath $testlink
+ 
+    function NewProcessStartInfo([string]$CommandLine, [switch]$RedirectStdIn)
+    {
+        return [ProcessStartInfo]@{
+            FileName               = $powershell
+            Arguments              = $CommandLine
+            RedirectStandardInput  = $RedirectStdIn
+            RedirectStandardOutput = $true
+            RedirectStandardError  = $true
+            UseShellExecute        = $false
+        }
+    }
+
+    function RunPowerShell([ProcessStartInfo]$debugfn)
+    {
+        $process = [Process]::Start($debugfn)
+        return $process
+    }
+
+    function EnsureChildHasExited([Process]$process, [int]$WaitTimeInMS = 15000)
+    {
+        $process.WaitForExit($WaitTimeInMS)
+
+        if (!$process.HasExited)
+        {
+            $process.HasExited | Should Be $true
+            $process.Kill()
+        }
+    }
+
+    function Clean-State
+    {
+        if (Test-Path $FullyQualifiedLink)
+        {
+	        Remove-Item $FullyQualifiedLink -Force
+        }
+
+        if (Test-Path $FullyQualifiedFile)
+        {
+	        Remove-Item $FullyQualifiedFile -Force
+        }
+
+        if (Test-Path $FullyQualifiedFolder)
+        {
+	    Remove-Item $FullyQualifiedFolder -Force
+        }
+    }
+
+    BeforeAll {
+        $powershell = Join-Path -Path $PsHome -ChildPath "powershell"
+    }
+
+#Both tests are pending due to a bug in Invoke-Item on Windows. Fixed for Linux
+
+    It "Should call the function without error" -Pending:$IsWindows { 
+        { New-Item -Name $testfile -Path $tmpDirectory -ItemType file } | Should Not Throw
+    }
+
+    It "Should invoke a text file without error" -Pending:$IsWindows {
+        $debugfn = NewProcessStartInfo "-noprofile ""``Invoke-Item $FullyQualifiedFile`n" -RedirectStdIn
+        $process = RunPowerShell $debugfn
+        EnsureChildHasExited $process
+        $process.ExitCode | Should Be 0
+    }    
+}