Add Pester tests for calling native Linux commands for issue 138

test/powershell/NativeLinuxCommands.Tests.ps1

@@ -0,0 +1,22 @@
+Describe "NativeLinuxCommands" {
+    It "Should return a type of System.Object for hostname cmdlet" {
+    (hostname).GetType().BaseType | Should Be 'System.Object'
+	(hostname).GetType().Name | Should Be String
+    }
+
+    It "Should have not empty Name flags set for ps object" {
+	ps | foreach-object { $_.ProcessName | Should Not BeNullOrEmpty }
+    }
+	
+	It "Should be able to call using the touch, cat, rm cmdlet" {
+	{ touch /NativeLinuxCommandsTestFile } | Should Not Throw
+	{ cat /NativeLinuxCommandsTestFile } | Should Not Throw
+	{ rm /NativeLinuxCommandsTestFile } | Should Not Throw
+    }
+	
+	It "Should be able to call using the mkdir, ls, rm cmdlet" {
+	{ mkdir /NativeLinuxCommandsTestFolder } | Should Not Throw
+	{ ls /NativeLinuxCommandsTestFolder } | Should Not Throw
+	{ rm /NativeLinuxCommandsTestFolder } | Should Not Throw
+    }
+}