What is a mock repository?

What is a mock repository?

Mocking is a way to encapsulate your unit tests. If you want to test a service method you are not interested if the repository is working. For this you will write repository tests. Therefore you mock the repository call and tell which result should be returned to test your method in all possible situation.

How do you test mock data?

The following two options for providing mock data exist:

1. Provide your own mock data. You can provide JSON files as test data for the mock server to produce the output.
2. Mock server generates the mock data. The mock server can produce random mock data based on the service metadata it simulates.

Should I unit test repository?

Yes, you should test your repository layer. Although the majority of these tests fall into a different classification of tests. I usually refer to them as integration tests to distinguish them from my unit tests.

How do you write a test case for a repository?

This is usually done by using an in-memory database and test cases that bootstrap a Spring ApplicationContext usually through the test context framework (as you already do), pre-populate the database (by inserting object instances through the EntityManager or repo, or via a plain SQL file) and then execute the query …

Can we mock a class?

Because of this, you can only mock interfaces, or virtual methods on concrete or abstract classes. Additionally, if you’re mocking a concrete class, you almost always need to provide a parameterless constructor so that the mocking framework knows how to instantiate the class.

What is difference between mock and stub?

A Mock is just testing behaviour, making sure certain methods are called. A Stub is a testable version (per se) of a particular object.

How do I mock a class without an interface?

Simply mark any method you need to fake as virtual (and not private). Then you will be able to create a fake that can override the method. Most mocking frameworks (Moq and RhinoMocks included) generate proxy classes as a substitute for your mocked class, and override the virtual methods with behavior that you define.

Can a mock repository be used for unit testing?

Another option is to create a mock repository. By using a mock repository, we can verify all of the mocks we create in one place, creating consistent verification without repetitive code for each test. To do this, we can write up a simple unit test base class that contains the MockRepository instance.

How to mock a repository call in Java?

Let me begin by saying you are on the right track by using Constructor Injection and not Field Injection (which makes writing tests with mocks much simpler). The call goes all the way from your service –> dataService. But only your repository calls are mocked.

How to mock a repository using Mockito Stack Overflow?

When the findById () method is called, the variable repository is null so when trying to do repository.findOne (id) it throws an exceptionn. This is what I am attempting to mock, but the repository is giving me issues.

How can I test a mock in Moq?

Moq provides a library that makes it simple to set up, test, and verify mocks. We can start by creating an instance of the class we’re testing, along with a mock of an interface we want to use.