counting lines on invocation method by reflection

[Philipp Kraus]

Hello,

I'm using Jacoco and testing AntLR visitor rules. I have got a parser which does not implement all methods, but these methods return "null", so I would like to check it for the line coverage if they really return null.

So I have written a test with a data provider, which put the parameter class into and the method name:

@Test
@UseDataProvider( "nullrules" )
public void nullreturnrules( @Nonnull final Pair<Class<?>, String> p_rule ) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException
{
    final ManualVisitor<Object> l_visitor = new CASTVisitorManual();

    Assert.assertNull(
        l_visitor.getClass().getMethod(
            p_rule.getRight(),
            p_rule.getLeft()
        ).invoke(
                l_visitor,
                Mockito.mock(
                    p_rule.getLeft()
                )
        )
    );
}

So the pair is for example: ManualParser.TernaryoperationContext.class and "visitTernaryoperation"

How can I tell JaCoCo agent that it should count the coverage?

Thanks

Phil

[Marc Hoffmann]

Hi Phil,

when the method was actually executed it should be marked as covered, Hard to tell from the snippets what’s going wrong here.

Please provide a executable minimal reproducer (preferably a GitHub repo) where we can analyze the issue.

Regards,

-marc

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[Evgeny Mandrikov]

On Monday, April 8, 2019 at 12:23:17 AM UTC+2, Philipp Kraus wrote:

How can I tell JaCoCo agent that it should count the coverage?

If your question is about how to use agent, then answer is: by starting JVM that executes test with the agent as described on page https://www.jacoco.org/jacoco/trunk/doc/agent.html

otherwise please clarify question.