使用JMock测试具体的第三方类

import org.jmock.Expectations;
import org.jmock.Mockery;
import org.jmock.lib.legacy.ClassImposteriser;
import org.junit.jupiter.api.Test;

public class ThirdPartyClassTest {
    private final Mockery context = new Mockery() {{
        setImposteriser(ClassImposteriser.INSTANCE);
    }};

    @Test
    public void testThirdPartyClass() {
        final ThirdPartyClass thirdPartyClassMock = context.mock(ThirdPartyClass.class);

        context.checking(new Expectations() {{
            oneOf(thirdPartyClassMock).someMethod();
            will(returnValue("someValue"));
        }});

        SomeClass someClass = new SomeClass(thirdPartyClassMock);
        String result = someClass.callSomeMethod();

        assertEquals("someValue", result);
    }
}