@Test
public void testUpgradeToCollectorAddressNotNeeded() {

    List<String> lines =
            ImmutableList.of("before=test", "collector.address=xyz:1234", "after=test");
    List<String> newLines = PropertiesFiles.upgradeToCollectorAddressIfNeeded(lines);
    assertThat(newLines).isEqualTo(lines);
}