Add test for anonymous class instance

Author: adisonlampert

lib/debug/server_dap.rb

@@ -1047,14 +1047,14 @@ def variable_ name, obj, indexedVariables: 0, namedVariables: 0
       if name
         { name: name,
           value: str,
-          type: type_name,
+          type: type_name || klass.to_s,
           variablesReference: vid,
           indexedVariables: indexedVariables,
           namedVariables: namedVariables,
         }
       else
         { result: str,
-          type: type_name,
+          type: type_name || klass.to_s,
           variablesReference: vid,
           indexedVariables: indexedVariables,
           namedVariables: namedVariables,

test/protocol/variables_test.rb

@@ -133,4 +133,26 @@ def test_overwritten_class_method
       end
     end
   end
+
+  class DAPAnonymousClassInstance < ProtocolTestCase
+    PROGRAM = <<~RUBY
+      1| f = Class.new.new
+      2| __LINE__
+    RUBY
+
+    def test_anonymous_class_instance
+      run_protocol_scenario PROGRAM, cdp: false do
+        req_add_breakpoint 2
+        req_continue
+
+        locals = gather_variables
+
+        variable_info = locals.find { |local| local[:name] == "f" }
+        assert_match /#<Class:.*>/, variable_info[:value]
+        assert_match /#<Class:.*>/, variable_info[:type]
+
+        req_terminate_debuggee
+      end
+    end
+  end
 end