assertFalse(DefaultMirrorSelector.isExternalRepo(getRepo("foo", "192.168.101.1")));
        assertFalse(DefaultMirrorSelector.isExternalRepo(getRepo("foo", "")));
    }

    @Test
    void testMirrorLookup() {
        Mirror mirrorA = newMirror("a", "a", "http://a");
        Mirror mirrorB = newMirror("b", "b", "http://b");

        List<Mirror> mirrors = Arrays.asList(mirrorA, mirrorB);