assertEquals(v1.hashCode(), v2.hashCode());
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(newArtifactVersion("1").equals(null));
    }

    @Test
    void testEqualsTypeSafe() {
        assertFalse(newArtifactVersion("1").equals("non-an-artifact-version-instance"));
    }

    private void assertVersionOlder(String left, String right) {
        assertTrue(