ALL-UNNAMED module does not export all packages from classpath

[Libor Kramolis]

Hello.

I have problem to compile following unit test:
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class TestCase {

    @Test
    public void test() {
        Context context = mock(Context.class);
        when(context.test(any())) //returns org.mockito.stubbing.OngoingStubbing
                .thenReturn("mock");

        assertEquals("mock", context.test("any"));
    }

    interface Context {
        String test(String value);
    }

}
with following error:

src/test/java/tst/TestCase.java:15: error: OngoingStubbing.thenReturn(T,T...) in package org.mockito.stubbing is not accessible
                .thenReturn("mock");
                ^
  (package org.mockito.stubbing is declared in module , which does not export it)
  where T is a type-variable:
    T extends Object declared in interface OngoingStubbing
1 error

Interface org.mockito.stubbing.OngoingStubbing is returned by when(…) method. And whenever I explicitly import the interface (no other change in code is necessary) compilation works.

Full reproduced sources are available in zip file at http://anise.cz/~paja/liba/reproducer.zip <http://anise.cz/~paja/liba/reproducer.zip>. It contains javac commands. It is also possible to build it by Maven.

What do you think about this behaviour? It seems to me as a bug. The import statement is very artificial in this case.

Thanks in advance for your help.

Best regards,
Libor