Add new pester test to clean up created file

src/Microsoft.PowerShell.Commands.Omi/test/Start-DscConfiguration.Tests.ps1

@@ -3,6 +3,7 @@
 
 $here = Split-Path -Parent $MyInvocation.MyCommand.Path
 $mof = "$here/assets/sample.mof"
+$mofCleanup = "$here/assets/sample-cleanup.mof"
 $mofMeta = "$here/assets/sampleMeta.mof"
 $file = "/tmp/linux.txt"
 
@@ -21,6 +22,13 @@ Describe "DscConfiguration" {
         $s.VALUE    | Should Be "0"
     }
 
+    It "Should remove temp file just created" {
+        $s = Start-DscConfiguration -ConfigurationMof $mofCleanup | 
+                Where-Object {$_.NAME -eq "ReturnValue"}
+        $s.VALUE    | Should Be "0"
+        $file       | Should Not Exist
+    }
+
     It "Should set Meta MOF file properly" {
         $s = Set-DscLocalConfigurationManager -ConfigurationMof $mofMeta | 
                 Where-Object {$_.NAME -eq "ReturnValue"}

src/Microsoft.PowerShell.Commands.Omi/test/sample-cleanup.mof

@@ -0,0 +1,19 @@
+instance of MSFT_nxFileResource
+{
+	Contents = "my contents";
+	DestinationPath = "/tmp/linux.txt";
+	Ensure = "Absent";
+	Type = "File";
+	ResourceId = "[MSFT_nxFileResource]File1";
+	ModuleName = "nx";
+	ModuleVersion = "1.0";
+	
+	
+};
+
+instance of OMI_ConfigurationDocument
+{
+  Version="1.0.0";
+  
+};
+