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18 package org.apache.commons.lang3.function;
19
20 import static org.junit.jupiter.api.Assertions.assertEquals;
21
22 import java.math.BigInteger;
23 import java.util.concurrent.atomic.AtomicReference;
24 import java.util.function.Function;
25
26 import org.apache.commons.lang3.AbstractLangTest;
27 import org.junit.jupiter.api.Test;
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31
32 public class TriFunctionTest extends AbstractLangTest {
33
34 @Test
35 public void testAccept() throws Throwable {
36 final AtomicReference<Character> ref1 = new AtomicReference<>();
37 final AtomicReference<Short> ref2 = new AtomicReference<>();
38 final AtomicReference<String> ref3 = new AtomicReference<>();
39 final TriFunction<AtomicReference<Character>, AtomicReference<Short>, AtomicReference<String>, String> tri = (t, u, v) -> {
40 ref1.set(Character.valueOf('a'));
41 ref2.set(Short.valueOf((short) 1));
42 ref3.set("z");
43 return "ABC";
44 };
45 assertEquals("ABC", tri.apply(ref1, ref2, ref3));
46 assertEquals(Character.valueOf('a'), ref1.get());
47 assertEquals(Short.valueOf((short) 1), ref2.get());
48 assertEquals("z", ref3.get());
49 }
50
51 @Test
52 public void testAndThen() throws Throwable {
53 final AtomicReference<Character> ref1 = new AtomicReference<>();
54 final AtomicReference<Short> ref2 = new AtomicReference<>();
55 final AtomicReference<String> ref3 = new AtomicReference<>();
56 final TriFunction<AtomicReference<Character>, AtomicReference<Short>, AtomicReference<String>, String> tri = (t, u, v) -> {
57 ref1.set(Character.valueOf('a'));
58 ref2.set(Short.valueOf((short) 1));
59 ref3.set("z");
60 return "9";
61 };
62 final Function<String, BigInteger> after = t -> {
63 ref1.set(Character.valueOf('b'));
64 ref2.set(Short.valueOf((short) 2));
65 ref3.set("zz");
66 return BigInteger.valueOf(Long.parseLong(t)).add(BigInteger.ONE);
67 };
68 assertEquals(BigInteger.TEN, tri.andThen(after).apply(ref1, ref2, ref3));
69 assertEquals(Character.valueOf('b'), ref1.get());
70 assertEquals(Short.valueOf((short) 2), ref2.get());
71 assertEquals("zz", ref3.get());
72 }
73
74 }