gjstest（Google JS Test）是在 V8 引擎上快速运行 javascript 单元测试框架的工具，且不需要用户启动完整的浏览器。当然，假如你在 V8 上面测试的时候没有浏览器也没有 DOM 的话，你可以使用本工具来完成测试。

特征如下：

• 能够极快的启动测试和执行测试，且不需要运行浏览器

• 输出可读的测试结果，测试失败也可读、明了

• 一个基于浏览器的测试运行工具能够随 JS 的变化而变化

• 风格和语义都类似 C＋＋风格

• 内置模拟框架，所以只需要极少的代码即可完成测试

代码示例：

function UserInfoTest() {    // Each test function gets its own instance of UserInfoTest, so tests can    // use instance variables to store state that doesn't affect other tests.    // There's no need to write a tearDown method, unless you modify global    // state.    //    // Create an instance of the class under test here, giving it a mock    // function that we also keep a reference to below.    this.getInfoFromDb_ = createMockFunction();    this.userInfo_ = new UserInfo(this.getInfoFromDb_);  }  registerTestSuite(UserInfoTest);     addTest(UserInfoTest, function formatsUSPhoneNumber() {    // Expect a call to the database function with the argument 0xdeadbeef. When    // the call is received, return the supplied string.    expectCall(this.getInfoFromDb_)(0xdeadbeef)      .willOnce(returnWith('phone_number: "650 253 0000"'));       // Make sure that our class returns correctly formatted output.    expectEq('(650) 253-0000', this.userInfo_.getPhoneForId(0xdeadbeef));  });     addTest(UserInfoTest, function returnsLastNameFirst() {    expectCall(this.getInfoFromDb_)(0xdeadbeef)      .willOnce(returnWith('given_name: "John" family_name: "Doe"'));       // Make sure that our class puts the last name first.    expectEq('Doe, John', this.userInfo_.getNameForId(0xdeadbeef));  });

项目主页：http://www.open-open.com/lib/view/home/1429710351791