CODEWITHSUNDEEP
javajuniteasymock
richardb
richardb

Reputation: 151

How to avoid mocking interface default methods with EasyMock?

I have an interface having default methods. These refer to non-default methods and I want to mock only those.

Example:

public interface InterfaceWithDefaultMethod {

    public String getTestString();
    
    public default String getCombinedString() {
        return "Test" + getTestString();
    }
}

I only want to mock getTestString()

EasyMock.mock(InterfaceWithDefaultMethod.class) does produce a mock class where all methods are mocked, i.e. getCombinedString is not being delegated to getTestString().

Upvotes: 1

Views: 601

Answers (1)

richardb
richardb

Reputation: 151

The problem can be solved by creating a dummy implementation of the interface and to partial-mock this dummy implementation.

private static class InterfaceMock implements InterfaceWithDefaultMethod {

    @Override
    public String getTestString() {
        return null;
    }
        
}

private InterfaceWithDefaultMethod testedInterface;

@Before
public void setup() {
    testedInterface = createMockBuilder(InterfaceMock.class)
        .addMockedMethod("getTestString")
        .createMock();
    resetToNice(testedInterface);
    expect(testedInterface.getTestString()).andStubReturn("First");
    replay(testedInterface);
}

Upvotes: 1

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