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18 package org.apache.commons.io.function;
19
20 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
21 import static org.junit.jupiter.api.Assertions.assertEquals;
22 import static org.junit.jupiter.api.Assertions.assertThrows;
23
24 import java.io.Closeable;
25 import java.io.IOException;
26 import java.io.StringReader;
27 import java.io.UncheckedIOException;
28 import java.nio.file.Files;
29 import java.util.Arrays;
30 import java.util.Optional;
31 import java.util.concurrent.atomic.AtomicReference;
32 import java.util.stream.Stream;
33
34 import org.apache.commons.io.IOExceptionList;
35 import org.apache.commons.io.IOUtils;
36 import org.apache.commons.io.file.PathUtils;
37 import org.apache.commons.io.test.ThrowOnCloseReader;
38 import org.junit.jupiter.api.Test;
39
40
41
42
43 public class IOConsumerTest {
44
45 @Test
46 void testAccept() throws IOException {
47 IOConsumer.noop().accept(null);
48 IOConsumer.noop().accept(".");
49 Uncheck.accept(Files::size, PathUtils.current());
50
51 final AtomicReference<String> ref = new AtomicReference<>();
52 final IOConsumer<String> consumer = s -> ref.set(s + "1");
53 consumer.accept("A");
54 assertEquals("A1", ref.get());
55 }
56
57 @Test
58 void testAndThen() throws IOException {
59 final AtomicReference<String> ref = new AtomicReference<>();
60 final IOConsumer<String> consumer1 = s -> ref.set(s + "1");
61 final IOConsumer<String> consumer2 = s -> ref.set(ref.get() + "2" + s);
62 consumer1.andThen(consumer2).accept("B");
63 assertEquals("B12B", ref.get());
64 }
65
66 @Test
67 public void testAsConsumer() {
68 assertThrows(UncheckedIOException.class, () -> Optional.of("a").ifPresent(TestUtils.throwingIOConsumer().asConsumer()));
69 final AtomicReference<String> ref = new AtomicReference<>();
70 final IOConsumer<String> consumer1 = s -> ref.set(s + "1");
71 Optional.of("a").ifPresent(consumer1.asConsumer());
72 assertEquals("a1", ref.get());
73 }
74
75 @Test
76 public void testForAllArrayOf1() throws IOException {
77 IOConsumer.forAll(TestUtils.throwingIOConsumer(), (String[]) null);
78 IOConsumer.forAll(null, (String[]) null);
79 assertThrows(IOExceptionList.class, () -> IOConsumer.forAll(TestUtils.throwingIOConsumer(), "1"));
80
81 final AtomicReference<String> ref = new AtomicReference<>("0");
82 final IOConsumer<String> consumer1 = s -> ref.set(ref.get() + s);
83 IOConsumer.forAll(consumer1, "1");
84 assertEquals("01", ref.get());
85 }
86
87 @Test
88 public void testForAllArrayOf2() throws IOException {
89 IOConsumer.forAll(TestUtils.throwingIOConsumer(), (String[]) null);
90 IOConsumer.forAll(null, (String[]) null);
91 assertThrows(IOExceptionList.class, () -> IOConsumer.forAll(TestUtils.throwingIOConsumer(), "1", "2"));
92
93 final AtomicReference<String> ref = new AtomicReference<>("0");
94 final IOConsumer<String> consumer1 = s -> ref.set(ref.get() + s);
95 IOConsumer.forAll(consumer1, "1", "2");
96 assertEquals("012", ref.get());
97 }
98
99 @Test
100 public void testForAllIterableOf1() throws IOException {
101 IOConsumer.forAll(TestUtils.throwingIOConsumer(), (Iterable<Object>) null);
102 IOConsumer.forAll(null, (Iterable<Object>) null);
103 assertThrows(IOExceptionList.class, () -> IOConsumer.forAll(TestUtils.throwingIOConsumer(), Arrays.asList("1")));
104
105 final AtomicReference<String> ref = new AtomicReference<>("0");
106 final IOConsumer<String> consumer1 = s -> ref.set(ref.get() + s);
107 IOConsumer.forAll(consumer1, Arrays.asList("1"));
108 assertEquals("01", ref.get());
109 }
110
111 @Test
112 public void testForAllIterableOf2() throws IOException {
113 IOConsumer.forAll(TestUtils.throwingIOConsumer(), (Iterable<Object>) null);
114 IOConsumer.forAll(null, (Iterable<Object>) null);
115 assertThrows(IOExceptionList.class, () -> IOConsumer.forAll(TestUtils.throwingIOConsumer(), Arrays.asList("1", "2")));
116
117 final AtomicReference<String> ref = new AtomicReference<>("0");
118 final IOConsumer<String> consumer1 = s -> ref.set(ref.get() + s);
119 IOConsumer.forAll(consumer1, Arrays.asList("1", "2"));
120 assertEquals("012", ref.get());
121 }
122
123 @Test
124 public void testForAllStreamOf1() throws IOException {
125 IOConsumer.forAll(TestUtils.throwingIOConsumer(), (Stream<Object>) null);
126 IOConsumer.forAll(null, (Stream<Object>) null);
127 assertThrows(IOExceptionList.class, () -> IOConsumer.forAll(TestUtils.throwingIOConsumer(), Arrays.asList("1").stream()));
128
129 final AtomicReference<String> ref = new AtomicReference<>("0");
130 final IOConsumer<String> consumer1 = s -> ref.set(ref.get() + s);
131 IOConsumer.forAll(consumer1, Arrays.asList("1").stream());
132 assertEquals("01", ref.get());
133 }
134
135 @Test
136 public void testForAllStreamOf2() throws IOException {
137 IOConsumer.forAll(TestUtils.throwingIOConsumer(), (Stream<Object>) null);
138 IOConsumer.forAll(null, (Stream<Object>) null);
139 assertThrows(IOExceptionList.class, () -> IOConsumer.forAll(TestUtils.throwingIOConsumer(), Arrays.asList("1", "2").stream()));
140
141 final AtomicReference<String> ref = new AtomicReference<>("0");
142 final IOConsumer<String> consumer1 = s -> ref.set(ref.get() + s);
143 IOConsumer.forAll(consumer1, Arrays.asList("1", "2").stream());
144 assertEquals("012", ref.get());
145 }
146
147 @Test
148 public void testNoop() {
149 final Closeable nullCloseable = null;
150 final IOConsumer<IOException> noopConsumer = IOConsumer.noop();
151 assertDoesNotThrow(() -> IOUtils.close(nullCloseable, noopConsumer));
152 assertDoesNotThrow(() -> IOUtils.close(new StringReader("s"), noopConsumer));
153 assertDoesNotThrow(() -> IOUtils.close(new ThrowOnCloseReader(new StringReader("s")), noopConsumer));
154 }
155
156 }