我在使用 mock 编写单元测试时遇到问题.有一个我需要模拟的对象有很多吸气剂,我在代码中调用它们.但是,这些不是我的单元测试的目的.那么,有没有一种方法可以模拟所有方法,而不是一个一个地模拟它们.
I have a problem when writing unit testing with mock. There is a object which I need to mock have a lot getter, which I do call them at the code. However, those are not the purpose of my unit test. So, is there is a way I can mock all the methods instead of mock them one by one.
下面是代码示例:
public class ObjectNeedToMock{
private String field1;
...
private String field20;
private int theImportantInt;
public String getField1(){return this.field1;}
...
public String getField20(){return this.field20;}
public int getTheImportantInt(){return this.theImportantInt;}
}
这是我需要测试的服务类
and this is the service class I need to test
public class Service{
public void methodNeedToTest(ObjectNeedToMock objectNeedToMock){
String stringThatIdontCare1 = objectNeedToMock.getField1();
...
String stringThatIdontCare20 = objectNeedToMock.getField20();
// do something with the field1 to field20
int veryImportantInt = objectNeedToMock.getTheImportantInt();
// do something with the veryImportantInt
}
}
在测试类中,测试方法是这样的
within the test class, the test method is like
@Test
public void testMethodNeedToTest() throws Exception {
ObjectNeedToMock o = mock(ObjectNeedToMock.class);
when(o.getField1()).thenReturn(anyString());
....
when(o.getField20()).thenReturn(anyString());
when(o.getTheImportantInt()).thenReturn("1"); //This "1" is the only thing I care
}
那么,有没有一种方法可以避免将无用的field1"的所有when"写入field20"
So, is there a way that I can avoid writing all the "when" for the useless "field1" to "field20"
您可以控制模拟的默认答案.创建模拟时,请使用:
You can control the default answers of your mock. When you're creating the mock, use:
Mockito.mock(ObjectNeedToMock.class, new Answer() {
@Override
public Object answer(InvocationOnMock invocation) throws Throwable {
/*
Put your default answer logic here.
It should be based on type of arguments you consume and the type of arguments you return.
i.e.
*/
if (String.class.equals(invocation.getMethod().getReturnType())) {
return "This is my default answer for all methods that returns string";
} else {
return RETURNS_DEFAULTS.answer(invocation);
}
}
}));
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