JMockit学习笔记

@Mocked：被修饰的对象将会被Mock，对应的类和实例都会受影响（同一个测试用例中） @Injectable：仅Mock被修饰的对象 @Capturing：可以mock接口以及其所有的实现类 @Mock：MockUp模式中，指定被Fake的方法 1.2 常用的类 Expectations：期望，指定的方法必须被调用 StrictExpectations：严格的期望，指定方法必须按照顺序调用 NonStrictExpectations：非严格的期望，是否调用和顺序不作要求 Verifications：验证，一般配合NonStrictExpectations来使用 Invocation：工具类，可以获取调用信息 Delegate：自己指定返回值，适合那种需要参数决定返回值的场景，只需指定匿名子类就可以。 MockUp：模拟函数实现 Deencapsulation：反射工具类 2 使用实例

现有两个类如下：
SimpleTool.java:

public class SimpleTool {

 public String fun1(String str) {

 return "real: public String fun1(" + str + ")";

 private String fun2(String str) {

 return "real: private String fun2(" + str + ")";

 public String fun3(String str) {

 return "real: public String fun3(" + str + ")";

 public String fun4(String str) {

 return fun2(str);

}

UseSimpleTool.java:

public class UseSimpleTool {

 public String fun1(String name) {

 SimpleTool simpleTool = new SimpleTool();

 return simpleTool.fun1(name);

}

2.1 Status-based 2.1.1 实例1:Mocked

@Mocked

SimpleTool simpleTool;

@Test

public void testExpectation() {

 //未mock函数返回null

 new Expectations() {

 simpleTool.fun1(anyString);

 result = "MOCK";

 System.out.println(simpleTool.fun1("param"));

 System.out.println(simpleTool.fun3("param"));

 System.out.println(new UseSimpleTool().fun1("param"));

 new Verifications() {

 simpleTool.fun1(anyString);

 times = 2;

}

输出：

MOCK
null
MOCK

2.1.2 实例2:Injectable

@Injectable

SimpleTool simpleTool;

@Test

public void testExpectation() {

 //未mock函数返回null

 new Expectations() {

 simpleTool.fun1(anyString);

 result = "MOCK";

 System.out.println(simpleTool.fun1("param"));

 System.out.println(simpleTool.fun3("param"));

 System.out.println(new UseSimpleTool().fun1("param"));

 new Verifications() {

 simpleTool.fun1(anyString);

 times = 1;

}

输出：

MOCK
null
real: public String fun1(param)

2.1.3 结果可变Delegate

@Mocked

SimpleTool simpleTool;

@Test

public void testExpectation() {

 new Expectations() {

 simpleTool.fun1(anyString);

 result = new Delegate String () {

 public String aDelegateMethod(String str) {

 return str.equals("param0") ? "MOCK0" : "MOCK1";

 System.out.println(simpleTool.fun1("param0"));

 System.out.println(simpleTool.fun3("param"));

 System.out.println(new UseSimpleTool().fun1("param1"));

 new Verifications() {

 simpleTool.fun1(anyString);

 times = 2;

}

输出：

MOCK0
null
MOCK1

2.2 Behavior-based 2.2.1 Mock对象公有方法

@Test

public void testMockUp() {

 //影响该类所有实例

 new MockUp SimpleTool (){

 //未mock函数不受影响

 @Mock

 public String fun1(String str) {

 return "(MOCK)";

 SimpleTool simpleTool = new SimpleTool();

 System.out.println(simpleTool.fun1("param"));

 System.out.println(simpleTool.fun3("param"));

 UseSimpleTool useSimpleTool = new UseSimpleTool();

 System.out.println(useSimpleTool.fun1("param"));

}

输出：

(MOCK)
real: public String fun3(param)
(MOCK)

2.2.2 Mock对象私有方法

@Test

public void testMockUp() {

 new MockUp SimpleTool (){

 //未mock函数不受影响

 @Mock

 private String fun2(String str) {

 return "(MOCK)";

 SimpleTool simpleTool = new SimpleTool();

 System.out.println(simpleTool.fun1("param"));

 System.out.println(simpleTool.fun3("param"));

 System.out.println(simpleTool.fun4("param"));

}

输出：

real: public String fun1(param)
real: public String fun3(param)
(MOCK)

2.2.3 Mock接口

现有接口及其实现类如下：
SimleInterface.java:

public interface SimpleInterface {

 String getCityName();

 String getAreaName();

}

SimpleInterfaceImpl.java:

public class SimpleInterfaceImpl implements SimpleInterface {

 public String getCityName() {

 return "default city";

 public String getAreaName() {

 return "default area";

}

实例:

//此处使用Injectable和Mocked为一样的效果

@Injectable

SimpleInterface simpleInterface;

@Test

public void testUpper() throws Exception {

 SimpleInterface mockInstance = new MockUp SimpleInterface () {

 @Mock

 public String getCityName() {

 return "BEIJING(MOCK)";

 @Mock

 public String getAreaName() {

 return "HUABEI(MOCK)";

 }.getMockInstance();

 System.out.println(mockInstance.getCityName());

 System.out.println(mockInstance.getAreaName());

 System.out.println(simpleInterface.getCityName());

 System.out.println(simpleInterface.getAreaName());

 SimpleInterfaceImpl simpleInterfaceImpl = new SimpleInterfaceImpl();

 System.out.println(simpleInterfaceImpl.getCityName());

 System.out.println(simpleInterfaceImpl.getAreaName());

}

输出：

BEIJING(MOCK)
HUABEI(MOCK)
null
null
default city
default area

对于接口的Mock如何影响实现该接口的所有类的对象，尚需进一步研究。

转载：http://blog.csdn.net/foreverling/article/details/51234149