工具分享：JsMockito (JavaScript 单元测试工具)
JsMockito
用过Rhino Mocks后大家一定对它印象深刻，用它来做单元测试的case相当的省事。今天咱们同样来介绍一款Mock工具：JsMockito，用它能轻松的制作JavaScript程序的单元测试case。
JsMockito的运行还依赖另外一款开源的JS工具：JsHamcrest，我们可以通过如下代码来搭建测试环境：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Test JavaScript Mock</title>
<script src="jshamcrest.js" language="javascript" type="text/javascript"></script>
<script src="jsmockito.js" language="javascript" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
var mockFunc = JsMockito.mockFunction();
JsMockito.when(mockFunc)('jim').thenReturn('hello jim');
alert(mockFunc('jim'));
</script>
</head>
<body>
</body>
</html>
模拟JS的原生对象
var mockArray = JsMockito.mock(Array);
JsMockito.when(mockArray).slice(10).thenReturn('^__^');
alert(mockArray.slice(10)); //结果是: ^__^
模拟对象的方法
bob = {
FullName: 'bob ling',
Introduce: function () { return 'im bob'; }
};
var mockIntroduce = JsMockito.mockFunction();
JsMockito.when(mockIntroduce)().thenReturn("it's ok!");
bob.Introduce = mockIntroduce;
alert(bob.Introduce()); //结果是： it's ok
模拟对象的属性
var mockBob = JsMockito.mock(bob);
mockBob.FullName = 'Bruce Lee';
alert(mockBob.FullName);//结果是：Bruce Lee
模拟对象的方法（根据输入参数的情况来返回结果）
var mockFunction = JsMockito.mockFunction();
JsMockito.when(mockFunction)(JsHamcrest.Matchers.lessThan(10) && JsHamcrest.Matchers.greaterThan(5), JsHamcrest.Matchers.anything()).thenReturn('this value must belong 5 to 10');
alert(mockFunction(6, null)); //this value must belong 5 to 10
alert(mockFunction(2, null));//undefined
模拟对象的方法（根据调用环境的不同来返回结果）
context1 = {};
context2 = {};
var mockFunc = JsMockito.mockFunction();
JsMockito.when(mockFunc).call(context1).thenReturn('this method was called by context');
alert(mockFunc.apply(context1)); //this method was called by context
alert(mockFunc.apply(context2)); //undefined
alert(mockFunc.call(context1)); //this method was called by context
alert(mockFunc.call(context2)); //undefined