Can you mock static methods

As it turns out, it didn't take long to come in handy. The project I'm currently working on has a codebase barely a few months old. It's a relatively modern setup with AEM 6. The build has a hard quality gate on test coverage on new code. A particular feature we were introducing happened to rely on a static method which we weren't able to rewrite.

It also turned out that we had not previously mocked a static method in that particular codebase. Almost instinctively, we tried importing PowerMockito. It didn't take long to realise that the previous time we had used it, it was via a JUnit 4 runner. It appears PowerMock hasn't been updated to use JUnit 5 extensions yet. Now, JUnit 5 comes with a very neat way to support older engines via JUnit Vintage , so we could have written the test with PowerMock and JUnit 4 test and ran it that way.

We would have had to add the JUnit Vintage and PowerMock dependencies, though, which felt like a bit of technical debt to introduce. Mocking the static methods is considered to be a bad practice. If you try to do that, it means there is something wrong with the way you want to perform testing.

Of course you can use PowerMockito or any other framework capable of doing that, but try to rethink your approach. Use JMockit framework.

It worked for me. You don't have to write statements for mocking DBConenction. Just the below code is enough. There is an easy solution by using java FunctionalInterface and then add that interface as dependency for the class you are trying to unit test. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Mocking static methods with Mockito Ask Question. Asked 7 years, 10 months ago.

Active 1 month ago. Viewed k times. I've written a factory to produce java. Improve this question. Gerold Broser Naftuli Kay Naftuli Kay You can't with mockito by desing : — MariuszS. MariuszS It isn't by design that Mockito or EasyMock, or jMock does not support mocking static methods, but by accident. This happened in the.

NET world as well. There is some design behind this limitation too : — MariuszS. MariuszS I read that as an attempt to dismiss legitimate use cases instead of admiting the tool has limitations that cannot be easily removed, and without providing any reasoned justification. BTW, here is such a discussion for the opposite viewpoint, with references. Mockito now supports mocking static methods since v3. Show 6 more comments. What happens when you aren't able fo fall back on dependency injection?

Take a look at this example of how PowerMock can help. Like Join the DZone community and get the full member experience.

Join For Free. PowerMock, Features and Use Cases PowerMock is a mocking framework that extends other mocking frameworks to provide much needed additional functionality. Locale; import java. FooProp ;. Mocking Static Property Set Mocking a static property setter works differently from mocking a static property getter. While the lambda function for a getter can be narrowed down to an expression, the function for a setter can be done only though an action and with a different API: public class Foo.

IsTrue isCalled ;. Mocking Extension Methods Extension methods are a special kind of static methods. Echo is called with any string argument,.

Echo Arg. Echo "hello" ;.