Make #inspect method can return class, module and object classname

features/class.feature

@@ -36,6 +36,6 @@ Feature: Class
       """
       class Foo
       end
-      Foo
+      Foo.inspect
       """
-    Then there should return class "Foo"
+    Then there should return string "Foo"

features/kernel.feature

@@ -0,0 +1,7 @@
+Feature: Kernel
+  Scenario: I can inspect Kernel module to get its name
+    When I execute ruby code:
+      """
+      Kernel.inspect
+      """
+    Then there should return string "Kernel"

features/object.feature

@@ -18,9 +18,14 @@ Feature: Object
       """
     Then there should return string "world"
 
-  Scenario: I can inspect Object to get its name
+  Scenario: I can inspect object which is an instance of a class
     When I execute ruby code:
       """
-      Object.inspect
+      class Hello
+        def world
+          "world"
+        end
+      end
+      Hello.new.inspect
       """
-    Then there should return string "Object"
+    Then there should return string "Hello"

kernel.go

@@ -5,12 +5,11 @@ import "fmt"
 func objectInspect(mrb *State, self Value) Value {
 	switch v := self.(type) {
 	case *Object:
-		return "Object"
-	case *Class:
+		name := mrb.ObjectInstanceVariableGet(v.Class(), _classname(mrb))
+		return name
+	case RClass:
 		name := mrb.ObjectInstanceVariableGet(v, _classname(mrb))
 		return name
-	case *Module:
-		return "Module"
 	default:
 		return nil
 	}