Add Remove-Variable Pester Test

test/powershell/Remove-Variable.Tests.ps1

@@ -191,3 +191,93 @@ Describe "Remove-Variable" {
 	}
     }
 }
+
+
+Describe "Remove-Variable basic functionality" -Tags DRT{
+	It "Remove-Variable variable should works"{
+		New-Variable foo bar
+		Remove-Variable foo
+		$var1 = Get-Variable -Name foo -EA SilentlyContinue
+		$var1 | Should BeNullOrEmpty
+	}
+	
+	It "Remove-Variable Constant variable should throw SessionStateUnauthorizedAccessException"{
+		New-Variable foo bar -Option Constant
+		try
+		{
+			Remove-Variable foo -EA Stop
+			Throw "Execution OK" 
+		}
+		catch 
+		{
+			$_.CategoryInfo | Should Match "SessionStateUnauthorizedAccessException"  
+			$_.FullyQualifiedErrorId | Should be "VariableNotRemovable,Microsoft.PowerShell.Commands.RemoveVariableCommand"
+		}
+	}
+	
+	It "Remove-Variable ReadOnly variable should throw SessionStateUnauthorizedAccessException and force remove should work"{
+		New-Variable foo bar -Option ReadOnly
+		try
+		{
+			Remove-Variable foo -EA Stop
+			Throw "Execution OK"
+		}
+		catch 
+		{
+			$_.CategoryInfo| Should Match "SessionStateUnauthorizedAccessException"  
+			$_.FullyQualifiedErrorId | Should be "VariableNotRemovable,Microsoft.PowerShell.Commands.RemoveVariableCommand"
+		}
+		Remove-Variable foo -Force
+		$var1 = Get-Variable -Name foo -EA SilentlyContinue
+		$var1 | Should BeNullOrEmpty
+	}
+	
+	It "Remove-Variable Constant variable should throw SessionStateUnauthorizedAccessException and force remove should also throw exception"{
+		New-Variable foo bar -Option Constant
+		try
+		{
+			Remove-Variable foo -EA Stop
+			Throw "Execution OK" 
+		}
+		catch 
+		{
+			$_.CategoryInfo | Should Match "SessionStateUnauthorizedAccessException"  
+			$_.FullyQualifiedErrorId | Should be "VariableNotRemovable,Microsoft.PowerShell.Commands.RemoveVariableCommand"
+		}
+		
+		try
+		{
+			Remove-Variable foo -Force -EA Stop
+			Throw "Execution OK" 
+		}
+		catch 
+		{
+			$_.CategoryInfo | Should Match "SessionStateUnauthorizedAccessException"  
+			$_.FullyQualifiedErrorId | Should be "VariableNotRemovable,Microsoft.PowerShell.Commands.RemoveVariableCommand"
+		}
+	}
+	
+	It "Remove-Variable variable in new scope should works and Get-Variable with different scope should have different result"{
+		New-Variable foo bar
+		&{
+			Clear-Variable foo
+			Remove-Variable foo
+			try{
+				Get-Variable -Name foo -Scope local -EA Stop
+				Throw "Execution OK"
+			}
+			catch 
+			{
+				$_.CategoryInfo | Should Match "ItemNotFoundException"  
+				$_.FullyQualifiedErrorId | Should be "VariableNotFound,Microsoft.PowerShell.Commands.GetVariableCommand"
+			}
+		}
+		
+		$var1 = Get-Variable -Name foo
+		$var1.Name | Should Be "foo"
+		$var1.Value | Should Be "bar"
+		$var1.Options | Should Be "None"
+		$var1.Description | Should Be ""
+		
+	}
+}