@Test
public void sortByExample4() {
List<Integer> example = asList(1, 3, 5, 2, 4, 6);
final List<String> expected = asList("1", "3", "5", "2", "4", "6");
assertEquals(
expected,
Algorithms.sortByExample(
example,
Strings.<Integer>string(),
asList("6", "5", "4", "3", "2", "1"),
Functions.<String>identity()));
assertEquals(
asList("3", "5", "4"),
Algorithms.sortByExample(
example,
Strings.<Integer>string(),
asList("5", "4", "3"),
Functions.<String>identity()));
assertEquals(
expected,
Algorithms.sortByExample(
example,
Strings.<Integer>string(),
asList("1", "2", "3", "4", "5", "6", "7", "8", "9"),
Functions.<String>identity()));
}
public void testCompose() {
Function<String, String> trim = TrimStringFunction.INSTANCE;
Predicate<String> equalsFoo = Predicates.equalTo("Foo");
Predicate<String> equalsBar = Predicates.equalTo("Bar");
Predicate<String> trimEqualsFoo = Predicates.compose(equalsFoo, trim);
Function<String, String> identity = Functions.identity();
assertTrue(trimEqualsFoo.apply("Foo"));
assertTrue(trimEqualsFoo.apply(" Foo "));
assertFalse(trimEqualsFoo.apply("Foo-b-que"));
new EqualsTester()
.addEqualityGroup(trimEqualsFoo, Predicates.compose(equalsFoo, trim))
.addEqualityGroup(equalsFoo)
.addEqualityGroup(trim)
.addEqualityGroup(Predicates.compose(equalsFoo, identity))
.addEqualityGroup(Predicates.compose(equalsBar, trim))
.testEquals();
}
@Test
public void testIdentity() throws Exception {
Object o = new Object();
assertSame(o, Functions.identity().call(o));
assertNull(Functions.identity().call(null));
}
public static File copyResources(ClassLoader classLoader, String rootPath, File toDir) {
return copyResources(classLoader, rootPath, toDir, Functions.<String>identity());
}
public static Function<Long, Long> identity() {
return Functions.identity();
}
