Google JS Test 是一个运行于V8 JavaScript引擎下的Javascript单元测试框架,其在Google内部负责对Chrome的快速JS执行速度进行测试,现在Google以开源工程开放大家使用。Google JS Test主要特性:
- 超快的启动速度和执行时间,不需要在浏览器里运行
- 清爽而具有可读性的输出内容
- 也有一个可选的基于浏览器的测试器,可在JS修改的时候刷新
- 其样式和语义跟Google Test for C++类似
- 内置的Mocking框架只需要最简单的样板代码,其样式和语义基于Google C++ Mocking Framework
- 匹配系统允许表达式测试,并可直观的阅读输出的错误提示,内置了很多匹配器,用户也可自行添加
function UserInfoTest() { this.getInfoFromDb_ = createMockFunction(); this.userInfo_ = new UserInfo(this.getInfoFromDb_); } registerTestSuite(UserInfoTest); UserInfoTest.prototype.formatsUSPhoneNumber = function() { // 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)); }; UserInfoTest.prototype.returnsLastNameFirst = function() { 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)); };
The test's output is clean and readable:
[ RUN ] UserInfoTest.formatsUSPhoneNumber [ OK ] UserInfoTest.formatsUSPhoneNumber [ RUN ] UserInfoTest.returnsLastNameFirst user_info_test.js:32 Expected: 'Doe, John' Actual: 'John Doe' [ FAILED ] UserInfoTest.returnsLastNameFirst [ RUN ] UserInfoTest.understandsChineseNames [ OK ] UserInfoTest.understandsChineseNames