@Test
public void testContainsIgnoreCase() {

  assertTrue(Strings.containsIgnoreCase("Favorites", ""));
  assertTrue(Strings.containsIgnoreCase("Favorites", "F"));
  assertTrue(Strings.containsIgnoreCase("Favorites", "Fa"));
  assertTrue(Strings.containsIgnoreCase("Font Size", "Fo"));
  assertTrue(Strings.containsIgnoreCase("Font Size", "fo"));
  assertTrue(Strings.containsIgnoreCase("Font Size", "fO"));
  assertTrue(Strings.containsIgnoreCase("Font Size", "nt si"));
  assertTrue(Strings.containsIgnoreCase("Scaling & Ordering", "ord"));
  assertFalse(Strings.containsIgnoreCase(null, "Fo"));
  assertFalse(Strings.containsIgnoreCase("Favorites", null));
  assertFalse(Strings.containsIgnoreCase("Favorites", "Fo"));
  assertFalse(Strings.containsIgnoreCase("Scaling & Ordering", "awdawdhwhd"));
}