Add Pester test for Remove-Module

test/powershell/Remove-Module.Tests.ps1

@@ -0,0 +1,23 @@
+Describe "Remove-Module" {
+    $moduleName = "Microsoft.PowerShell.Platform"
+    
+    BeforeEach {
+        Import-Module -Name $moduleName -Force
+        (Get-Module -Name $moduleName).Name | Should be $moduleName 
+    }
+
+    It "should be able to remove a module with using Name switch" {
+        { Remove-Module -Name $moduleName } | Should Not Throw        
+        (Get-Module -Name $moduleName).Name | Should BeNullOrEmpty
+    }
+
+    It "should be able to remove a module with using ModuleInfo switch" {
+        $a = Get-Module -Name $moduleName
+        { Remove-Module -ModuleInfo $a } | Should Not Throw
+        (Get-Module -Name $moduleName).Name | Should BeNullOrEmpty
+    }
+	
+	AfterEach {
+        Import-Module -Name $moduleName -Force
+    }
+}