DefaultAttributeMapTest - Refactored - Simplified

final int FIRST_VALUE = 1;
final int LAST_VALUE = 3653;
@Test
public void test() {
    // Instantiate a map and a key

    map.setAttr(key, LAST_VALUE);
    assertThat(map.attr(key)).isEqualTo(LAST_VALUE);

    map.setAttr(key, FIRST_VALUE);
    assertThat(map.attr(key)).isEqualTo(FIRST_VALUE);
}