java使用EasyMock模拟接受参数的接口

Question

我有一个类MyClass，它包含一个调用接口MyInterface的构造函数MyInterface包含一个方法validator，该方法接受一个Int和一个String

我需要使用EasyMock在JUnit测试中模拟来自MyInterface.validator的返回Boolean值

我已经多次尝试过这个put，当我试图从MyClass调用MyInterface.validator时，我只得到Java异常

public class MyClass {

public MyInterface myInterface;
public int test;

public MyClass (int INT, String STRING, MyInterface myInterface) {

    this.myInterface = myInterface;
    this.test = INT;
    myInterface.validator(INT, STRING);

}
}

---

public interface MyInterface {
public Boolean validator(int INT, String STRING);
}

---

public class MyClassTest {
MyInterface mockMyInterface;
MyClass myClass;

@Before
public void setUp() throws Exception {
    mockMyInterface = createMock(MyInterface.class);
}

@Test
public void test() {
    myClass = new MyClass(10, "Test", mockMyInterface);
    expect(mockMyInterface.validator(10, "Test")).andStubReturn(true);
    replay(mockMyInterface);
    assertEquals(myClass.test, 10);
    verify(mockMyInterface);
}
}

Answer 1

在使用它之前，必须配置模拟预期。您的构造函数调用mock，因此您应该在创建MyClass实例之前对其进行配置

试试这个：

public class MyClassTest {
  MyInterface mockMyInterface;
  MyClass myClass;

  @Before
  public void setUp() throws Exception {
      mockMyInterface = createMock(MyInterface.class);
  }

  @Test
  public void test() {
    expect(mockMyInterface.validator(10, "Test")).andStubReturn(true);
    replay(mockMyInterface);

    myClass = new MyClass(10, "Test", mockMyInterface);    

    assertEquals(myClass.test, 10);
    verify(mockMyInterface);
  }
}