easymock java.lang.IllegalStateException: 2 matchers expected, 1 recorded.

When using EasyMock 2 for testing, typically we need to set up expectations before replay, like this:

    expect(mockEmployeeRepository
       .findByFirstNameAndLastName("John", "Doe"))
       .andReturn(employees);

Sometimes, you don't know exactly what parameter will be used for the expected call, you can instead specify the class of the parameter, such as:

    expect(mockEmployeeRepository
       .findBySpecification(isA(EmployeeSearchSpecification.class))
       .andReturn(employees);

What if you know the exact value of some but not all parameters? I tried the following:

    expect(mockEmployeeRepository
       .findByDepartmentAndSpecification("HR",
       isA(EmployeeSearchSpecification.class))
       .andReturn(emplooyees);

Unfortunately, running this test will get the following exception thrown by EasyMock:

    java.lang.IllegalStateException: 2 matchers expected, 1 recorded.

The correct way is to wrap the known parameter with an "eq" matcher:

    expect(mockEmployeeRepository
       .findByDepartmentAndSpecification(eq("HR"),
       isA(EmployeeSearchSpecification.class))
       .andReturn(employees);

This is a small quirk when using EasyMock 2.2...


need import static org.easymock.EasyMock.eq;