Write a test for static method in IDL interface. (#117)

This patch also changes getCalledConstructorInfo() to static method and
rename it with getLastCallInfo() and then use it use generally.

ISSUE=#99,#100

test/interface_constructor.test.ts

@@ -43,16 +43,16 @@ test('When creating two objects, should be differnt instances', async () => {
 
 test('Test for constructor overloading', async () => {
   let constructor1 = new bacardi.TestInterface();
-  expect(constructor1.getCalledConstructorInfo()).toBe('Constructor()');
+  expect(bacardi.TestInterface.getLastCallInfo()).toBe('Constructor()');
 
   let constructor2 = new bacardi.TestInterface(1);
-  expect(constructor2.getCalledConstructorInfo()).toBe('Constructor(long)');
+  expect(bacardi.TestInterface.getLastCallInfo()).toBe('Constructor(long)');
 
   let constructor3 = new bacardi.TestInterface(2, 3);
-  expect(constructor3.getCalledConstructorInfo())
+  expect(bacardi.TestInterface.getLastCallInfo())
       .toBe('Constructor(long, long)');
 
   let constructor4 = new bacardi.TestInterface('hello', 'world');
-  expect(constructor4.getCalledConstructorInfo())
+  expect(bacardi.TestInterface.getLastCallInfo())
       .toBe('Constructor(string, string)');
 });

test/interface_static_method.test.ts

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) 2017 The Bacardi Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as bindings from 'bindings';
+
+const bacardi = bindings('bacardi.node');
+
+test('Basic of static method', async () => {
+  // We can call the static methods without object instantiation.
+  bacardi.TestInterface.staticMethod1();
+  expect(bacardi.TestInterface.getLastCallInfo())
+      .toBe('static void staticMethod1()');
+  bacardi.TestInterface.staticMethod2(10, 'test');
+  expect(bacardi.TestInterface.getLastCallInfo())
+      .toBe('static boolean staticMethod2(long, string)');
+});

test/test_interface.cc

@@ -16,17 +16,35 @@
 
 #include "test/test_interface.h"
 
-TestInterface::TestInterface() : called_constructor_info_("Constructor()") {}
+// static
+std::string TestInterface::last_call_info_;
 
-TestInterface::TestInterface(long createTime)
-    : called_constructor_info_("Constructor(long)") {}
+TestInterface::TestInterface() {
+  last_call_info_ = "Constructor()";
+}
 
-TestInterface::TestInterface(long arg1, long arg2)
-    : called_constructor_info_("Constructor(long, long)") {}
+TestInterface::TestInterface(long number) {
+  last_call_info_ = "Constructor(long)";
+}
 
-TestInterface::TestInterface(const std::string& msg1, const std::string& msg2)
-    : called_constructor_info_("Constructor(string, string)") {}
+TestInterface::TestInterface(long number1, long number2) {
+  last_call_info_ = "Constructor(long, long)";
+}
+
+TestInterface::TestInterface(const std::string& string1,
+                             const std::string& string2) {
+  last_call_info_ = "Constructor(string, string)";
+}
+
+const std::string& TestInterface::GetLastCallInfo() {
+  return last_call_info_;
+}
+
+void TestInterface::StaticMethod1() {
+  last_call_info_ = "static void staticMethod1()";
+}
 
-const std::string& TestInterface::GetCalledConstructorInfo() const {
-  return called_constructor_info_;
+bool TestInterface::StaticMethod2(long number, const std::string& string) {
+  last_call_info_ = "static boolean staticMethod2(long, string)";
+  return 0;
 }

test/test_interface.h

@@ -26,10 +26,17 @@ class TestInterface {
   TestInterface(long number1, long number2);
   TestInterface(const std::string& string1, const std::string& string2);
 
-  const std::string& GetCalledConstructorInfo() const;
+  static const std::string& GetLastCallInfo();
+
+  static void StaticMethod1();
+  static bool StaticMethod2(long number, const std::string& string);
 
  private:
-  const std::string called_constructor_info_;
+  // FIXME(zino): Currently, we should set this variable in each methods. It's
+  // not elegance way. We should find a way to get function name and signature
+  // automatically. (I tried __FUNCTION__ and __PRETTY_FUNCTION__ but they are
+  // dependent on each platform.
+  static std::string last_call_info_;
 };
 
 #endif  // TEST_TEST_INTERFACE_H_

test/test_interface.idl

@@ -22,5 +22,8 @@
 ]
 interface TestInterface {
   // FIXME(zino): It's better to use attribute instead of method.
-  string getCalledConstructorInfo();
+  static string getLastCallInfo();
+
+  static void staticMethod1();
+  static boolean staticMethod2(long number, string string);
 };