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Is it possible to mock an enumeration with Spock?

I have a switch statement to handle java enum foo, and I use spock to write some groovy unit tests. I already added a test that checks to see if each type of foo is processed without exception. Now I want to check that the unrecognized type foo will throw an exception.

To do this, I will have to mock the enumeration and have already seen the solution described here: Mocking Java enum to add a value to check for a failed option

I also know that it is possible to do this with powermock, but I really like spock, as I find it incredibly easy and therefore looked for a solution using spock.

I thought something like this might work:

    def "An unexpected type of foo causes an exception to be thrown"() {
        given:
        Foo foo = Mock()
        when:
        subjectUnderTest.handleFoo foo
        then:
        thrown Exception
}

However, this does not work with the following error message: org.spockframework.mock.CannotCreateMockException: Cannot create mock for class com.Foo because Java mocks cannot mock final classes. If the code under test is written in Groovy, use a Groovy mock.

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:

Enum Foo:

public enum Foo {
    ONE, TWO;
}

foo:

private void handleFoo(Foo foo) {
    switch (foo) {
        case ONE:
           doEventOne();
           break;
        case TWO:
           doEventTwo()
           break;
        default:
           throw new IllegalArgumentException("Do not know how to handle " + foo);
}
+4
1

:

def 'no exception thrown for all enums'() {
    given:
    def service = new SampleService()

    when:
    service.handleFoo(se)

    then:
    noExceptionThrown()

    where:
    se << SampleEnum.values()
}

, , . .

.

+5

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