@Test
public void testProjectOnExtension() {
Renaming r = Renaming.extension(sid, ssid, name, sname);
Renaming expected = Renaming.extension(name, sname);
// it works with a subset of original attributes
AttrList list = AttrList.attrs(name);
Renaming got = r.project(list);
assertEquals(expected, got);
// it is robust to a superset too (city was not part of it)
list = AttrList.attrs(name, city);
got = r.project(list);
assertEquals(expected, got);
}
