13,916 questions
1237
votes
12
answers
1.3m
views
How to mock void methods with Mockito
How to mock methods with void return type?
I implemented an observer pattern but I can't mock it with Mockito because I don't know how.
And I tried to find an example on the Internet but didn't ...
- 19k
962
votes
10
answers
602k
views
Making a mocked method return an argument that was passed to it
Consider a method signature like:
public String myFunction(String abc);
Can Mockito help return the same string that the method received?
- 13k
654
votes
5
answers
757k
views
Use Mockito to mock some methods but not others
Is there any way, using Mockito, to mock some methods in a class, but not others?
For example, in this (admittedly contrived) Stock class I want to mock the getPrice() and getQuantity() return values ...
- 16.6k
611
votes
6
answers
429k
views
Can Mockito capture arguments of a method called multiple times?
I have a method that gets called twice, and I want to capture the argument of the second method call.
Here's what I've tried:
ArgumentCaptor<Foo> firstFooCaptor = ArgumentCaptor.forClass(Foo....
- 59.7k
529
votes
14
answers
536k
views
Using Mockito with multiple calls to the same method with the same arguments
Is there a way to have a stubbed method return different objects on subsequent invocations? I'd like to do this to test nondeterminate responses from an ExecutorCompletionService. i.e. to test that ...
- 6,652
510
votes
9
answers
1.0m
views
Mockito : how to verify method was called on an object created within a method?
I am new to Mockito.
Given the class below, how can I use Mockito to verify that someMethod was invoked exactly once after foo was invoked?
public class Foo
{
public void foo(){
Bar bar =...
- 44.4k
415
votes
12
answers
333k
views
Using Mockito to mock classes with generic parameters
Is there a clean method of mocking a class with generic parameters? Say I have to mock a class Foo<T> which I need to pass into a method that expects a Foo<Bar>. I can do the following ...
- 6,541
397
votes
29
answers
646k
views
How to mock a final class with mockito
I have a final class, something like this:
public final class RainOnTrees{
public void startRain(){
// some code here
}
}
I am using this class in some other class like this:
public ...
- 4,937
368
votes
4
answers
328k
views
Can Mockito stub a method without regard to the argument?
I'm trying to test some legacy code, using Mockito.
I want to stub a FooDao that is used in production as follows:
foo = fooDao.getBar(new Bazoo());
I can write:
when(fooDao.getBar(new Bazoo()))....
- 59.7k
348
votes
12
answers
300k
views
Verify object attribute value with mockito
I have a method call which I want to mock with mockito. To start with I have created and injected an instance of an object on which the method will be called. My aim is to verify one of the object in ...
- 14.4k
320
votes
5
answers
361k
views
How to tell a Mockito mock object to return something different the next time it is called?
So, I'm creating a mock object as a static variable on the class level like so... In one test, I want Foo.someMethod() to return a certain value, while in another test, I want it to return a ...
- 41.9k
305
votes
6
answers
186k
views
Mockito verify order / sequence of method calls
Is there a way to verify if a methodOne is called before methodTwo in Mockito?
public class ServiceClassA {
public void methodOne(){}
}
public class ServiceClassB {
public void methodTwo(){}...
- 7,908
303
votes
7
answers
263k
views
Why doesn't Mockito mock static methods?
I read a few threads here about static methods, and I think I understand the problems misuse/excessive use of static methods can cause. But I didn't really get to the bottom of why it is hard to mock ...
- 8,016
289
votes
5
answers
214k
views
Mockito: Inject real objects into private @Autowired fields
I'm using Mockito's @Mock and @InjectMocks annotations to inject dependencies into private fields which are annotated with Spring's @Autowired:
@RunWith(MockitoJUnitRunner.class)
public class ...
- 3,207
284
votes
4
answers
188k
views
Difference between @Mock, @MockBean and Mockito.mock()
When creating tests and mocking dependencies, what is the difference between these three approaches?
@MockBean:
@MockBean
MyService myservice;
@Mock:
@Mock
MyService myservice;
Mockito.mock()
...
- 6,535
265
votes
9
answers
299k
views
Unfinished Stubbing Detected in Mockito
I am getting following exception while running the tests. I am using Mockito for mocking. The hints mentioned by Mockito library are not helping.
org.mockito.exceptions.misusing....
- 2,761
257
votes
16
answers
510k
views
How to resolve Unneccessary Stubbing exception
My Code is as below,
@RunWith(MockitoJUnitRunner.class)
public class MyClass {
private static final String code ="Test";
@Mock
private MyClassDAO dao;
@InjectMocks
private ...
- 2,579
233
votes
5
answers
269k
views
How to use Mockito with JUnit 5?
How can I use injection with Mockito and JUnit 5?
In JUnit 4, I can just use the @RunWith(MockitoJUnitRunner.class) annotation.
In JUnit 5, there is no @RunWith Annotation.
- 4,784
229
votes
6
answers
171k
views
Simulate first call fails, second call succeeds
I want to use Mockito to test the (simplified) code below. I don't know how to tell Mockito to fail the first time, then succeed the second time.
for(int i = 1; i < 3; i++) {
String ret = myMock....
- 10.4k
213
votes
6
answers
70k
views
When to use Mockito.verify()?
I write jUnit test cases for 3 purposes:
To ensure that my code satisfies all of the required functionality, under all (or most of) the input combinations/values.
To ensure that I can change the ...
- 2,131
210
votes
4
answers
224k
views
Mockito: List Matchers with generics
Mockito offers:
when(mock.process(Matchers.any(List.class)));
How to avoid warning if process takes a List<Bar> instead?
- 11.1k
207
votes
9
answers
228k
views
Mockito - @Spy vs @Mock [duplicate]
I understand a spy calls the real methods on an object, while a mock calls methods on the double object. Also spies are to be avoided unless there is a code smell.
However, how do spies work and when ...
- 2,141
199
votes
1
answer
324k
views
Java verify void method calls n times with Mockito
I'm trying to verify that a (void) method is being called inside of a DAO - I'm using a commit point that sends a list of results up to that point, resets the list and continues.
Say I have 4 things ...
- 3,158
197
votes
4
answers
259k
views
Mockito : doAnswer Vs thenReturn
I am using Mockito for service later unit testing. I am confused when to use doAnswer vs thenReturn.
Can anyone help me in detail? So far, I have tried it with thenReturn.
- 2,151
192
votes
16
answers
709k
views
Mockito How to mock and assert a thrown exception?
I'm using mockito in a junit test. How do you make an exception happen and then assert that it has (generic pseudo-code)
- 19.8k