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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.collections;
import org.junit.Test;
import java.util.Comparator;
import java.util.List;
import java.util.Locale;
import static org.junit.Assert.assertEquals;
/**
* @author jonmv
*/
public class AbstractFilteringListTest {
@Test
public void testOperations() {
MyList list = MyList.of("ABC", "abc", "cba", "bbb", "ABC");
assertEquals(List.of("ABC", "abc", "cba", "bbb", "ABC"),
list.first(100).asList());
assertEquals(List.of("ABC", "abc"),
list.first(2).asList());
assertEquals(List.of("cba", "bbb", "ABC"),
list.not().first(2).asList());
assertEquals(List.of("ABC", "ABC", "abc", "bbb"),
list.sortedBy(Comparator.naturalOrder()).first(4).asList());
assertEquals(List.of("abc", "cba", "bbb"),
list.allLowercase().asList());
assertEquals(List.of("ABC", "ABC"),
list.not().allLowercase().asList());
assertEquals(List.of("abc", "cba", "bbb"),
list.not().not().allLowercase().asList());
assertEquals(List.of(3, 3, 3, 3, 3),
list.mapToList(String::length));
assertEquals(List.of("ABC", "ABC"),
list.in(MyList.of("ABC", "CBA")).asList());
assertEquals(List.of("abc", "cba", "bbb"),
list.not().in(MyList.of("ABC", "CBA")).asList());
assertEquals(List.of("ABC", "abc", "cba", "bbb", "ABC", "aaa", "ABC"),
list.and(MyList.of("aaa", "ABC")).asList());
}
private static class MyList extends AbstractFilteringList<String, MyList> {
private MyList(List<String> strings, boolean negate) {
super(strings, negate, MyList::new);
}
private static MyList of(String... strings) {
return new MyList(List.of(strings), false);
}
private MyList allLowercase() {
return matching(string -> string.toLowerCase(Locale.ROOT).equals(string));
}
}
}
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