Add a bunch of tests

Author: Hosch250

RetailCoder.VBE/UI/Command/Refactorings/RefactorExtractInterfaceCommand.cs

@@ -21,22 +21,9 @@ public RefactorExtractInterfaceCommand(VBE vbe, RubberduckParserState state, IMe
             _messageBox = messageBox;
         }
 
-        private static readonly vbext_ComponentType[] ModuleTypes =
-        {
-            vbext_ComponentType.vbext_ct_ClassModule, 
-            vbext_ComponentType.vbext_ct_Document, 
-            vbext_ComponentType.vbext_ct_MSForm, 
-        };
-
         protected override bool CanExecuteImpl(object parameter)
         {
-            var activePane = Vbe.ActiveCodePane;
-            if (activePane == null)
-            {
-                return false;
-            }
-
-            var selection = activePane.GetQualifiedSelection();
+            var selection = Vbe.ActiveCodePane.GetQualifiedSelection();
             if (!selection.HasValue)
             {
                 return false;
@@ -49,9 +36,7 @@ protected override bool CanExecuteImpl(object parameter)
             var hasMembers = _state.AllUserDeclarations.Any(item => item.DeclarationType.HasFlag(DeclarationType.Member) && item.ParentDeclaration != null && item.ParentDeclaration.Equals(target));
 
             // true if active code pane is for a class/document/form module
-            var canExecute = ModuleTypes.Contains(Vbe.ActiveCodePane.CodeModule.Parent.Type) && target != null && hasMembers;
-
-            return canExecute;
+            return target != null && hasMembers;
         }
 
         protected override void ExecuteImpl(object parameter)

RetailCoder.VBE/UI/Command/Refactorings/RefactorImplementInterfaceCommand.cs

@@ -21,7 +21,7 @@ public RefactorImplementInterfaceCommand(VBE vbe, RubberduckParserState state)
 
         protected override bool CanExecuteImpl(object parameter)
         {
-            if (Vbe.ActiveCodePane == null || _state.Status != ParserState.Ready)
+            if (_state.Status != ParserState.Ready)
             {
                 return false;
             }
@@ -38,9 +38,7 @@ protected override bool CanExecuteImpl(object parameter)
                         !d.IsBuiltIn && d.DeclarationType == DeclarationType.ClassModule &&
                         d.QualifiedSelection.QualifiedName.Equals(selection.Value.QualifiedName));
 
-            var canExecute = targetInterface != null && targetClass != null;
-
-            return canExecute;
+            return targetInterface != null && targetClass != null;
         }
 
         protected override void ExecuteImpl(object parameter)