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17 package org.apache.commons.io;
18
19 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
20 import static org.junit.jupiter.api.Assertions.assertEquals;
21 import static org.junit.jupiter.api.Assertions.assertNotEquals;
22 import static org.junit.jupiter.api.Assertions.assertNotNull;
23 import static org.junit.jupiter.api.Assertions.assertThrows;
24
25 import java.nio.charset.Charset;
26
27 import org.junit.jupiter.api.Test;
28
29
30
31
32 public class ByteOrderMarkTest {
33
34 private static final ByteOrderMark TEST_BOM_1 = new ByteOrderMark("test1", 1);
35 private static final ByteOrderMark TEST_BOM_2 = new ByteOrderMark("test2", 1, 2);
36 private static final ByteOrderMark TEST_BOM_3 = new ByteOrderMark("test3", 1, 2, 3);
37
38
39 @Test
40 public void testConstantCharsetNames() {
41 assertNotNull(Charset.forName(ByteOrderMark.UTF_8.getCharsetName()));
42 assertNotNull(Charset.forName(ByteOrderMark.UTF_16BE.getCharsetName()));
43 assertNotNull(Charset.forName(ByteOrderMark.UTF_16LE.getCharsetName()));
44 assertNotNull(Charset.forName(ByteOrderMark.UTF_32BE.getCharsetName()));
45 assertNotNull(Charset.forName(ByteOrderMark.UTF_32LE.getCharsetName()));
46 }
47
48
49 @Test
50 public void testConstructorExceptions() {
51 assertThrows(NullPointerException.class, () -> new ByteOrderMark(null, 1, 2, 3));
52 assertThrows(IllegalArgumentException.class, () -> new ByteOrderMark("", 1, 2, 3));
53 assertThrows(NullPointerException.class, () -> new ByteOrderMark("a", (int[]) null));
54 assertThrows(IllegalArgumentException.class, () -> new ByteOrderMark("b"));
55 }
56
57
58 @SuppressWarnings("EqualsWithItself")
59 @Test
60 public void testEquals() {
61 assertEquals(ByteOrderMark.UTF_16BE, ByteOrderMark.UTF_16BE);
62 assertEquals(ByteOrderMark.UTF_16LE, ByteOrderMark.UTF_16LE);
63 assertEquals(ByteOrderMark.UTF_32BE, ByteOrderMark.UTF_32BE);
64 assertEquals(ByteOrderMark.UTF_32LE, ByteOrderMark.UTF_32LE);
65 assertEquals(ByteOrderMark.UTF_8, ByteOrderMark.UTF_8);
66
67 assertNotEquals(ByteOrderMark.UTF_8, ByteOrderMark.UTF_16BE);
68 assertNotEquals(ByteOrderMark.UTF_8, ByteOrderMark.UTF_16LE);
69 assertNotEquals(ByteOrderMark.UTF_8, ByteOrderMark.UTF_32BE);
70 assertNotEquals(ByteOrderMark.UTF_8, ByteOrderMark.UTF_32LE);
71
72 assertEquals(TEST_BOM_1, TEST_BOM_1, "test1 equals");
73 assertEquals(TEST_BOM_2, TEST_BOM_2, "test2 equals");
74 assertEquals(TEST_BOM_3, TEST_BOM_3, "test3 equals");
75
76 assertNotEquals(TEST_BOM_1, new Object(), "Object not equal");
77 assertNotEquals(TEST_BOM_1, new ByteOrderMark("1a", 2), "test1-1 not equal");
78 assertNotEquals(TEST_BOM_1, new ByteOrderMark("1b", 1, 2), "test1-2 not test2");
79 assertNotEquals(TEST_BOM_2, new ByteOrderMark("2", 1, 1), "test2 not equal");
80 assertNotEquals(TEST_BOM_3, new ByteOrderMark("3", 1, 2, 4), "test3 not equal");
81 }
82
83
84 @Test
85 public void testGetBytes() {
86 assertArrayEquals(TEST_BOM_1.getBytes(), new byte[] { (byte) 1 }, "test1 bytes");
87 TEST_BOM_1.getBytes()[0] = 2;
88 assertArrayEquals(TEST_BOM_1.getBytes(), new byte[] { (byte) 1 }, "test1 bytes");
89 assertArrayEquals(TEST_BOM_2.getBytes(), new byte[] { (byte) 1, (byte) 2 }, "test1 bytes");
90 assertArrayEquals(TEST_BOM_3.getBytes(), new byte[] { (byte) 1, (byte) 2, (byte) 3 }, "test1 bytes");
91 }
92
93
94 @Test
95 public void testGetCharsetName() {
96 assertEquals("test1", TEST_BOM_1.getCharsetName(), "test1 name");
97 assertEquals("test2", TEST_BOM_2.getCharsetName(), "test2 name");
98 assertEquals("test3", TEST_BOM_3.getCharsetName(), "test3 name");
99 }
100
101
102 @Test
103 public void testGetInt() {
104 assertEquals(1, TEST_BOM_1.get(0), "test1 get(0)");
105 assertEquals(1, TEST_BOM_2.get(0), "test2 get(0)");
106 assertEquals(2, TEST_BOM_2.get(1), "test2 get(1)");
107 assertEquals(1, TEST_BOM_3.get(0), "test3 get(0)");
108 assertEquals(2, TEST_BOM_3.get(1), "test3 get(1)");
109 assertEquals(3, TEST_BOM_3.get(2), "test3 get(2)");
110 }
111
112
113 @Test
114 public void testHashCode() {
115 final int bomClassHash = ByteOrderMark.class.hashCode();
116 assertEquals(bomClassHash + 1, TEST_BOM_1.hashCode(), "hash test1 ");
117 assertEquals(bomClassHash + 3, TEST_BOM_2.hashCode(), "hash test2 ");
118 assertEquals(bomClassHash + 6, TEST_BOM_3.hashCode(), "hash test3 ");
119 }
120
121
122 @Test
123 public void testLength() {
124 assertEquals(1, TEST_BOM_1.length(), "test1 length");
125 assertEquals(2, TEST_BOM_2.length(), "test2 length");
126 assertEquals(3, TEST_BOM_3.length(), "test3 length");
127 }
128
129
130 @Test
131 public void testToString() {
132 assertEquals("ByteOrderMark[test1: 0x1]", TEST_BOM_1.toString(), "test1 ");
133 assertEquals("ByteOrderMark[test2: 0x1,0x2]", TEST_BOM_2.toString(), "test2 ");
134 assertEquals("ByteOrderMark[test3: 0x1,0x2,0x3]", TEST_BOM_3.toString(), "test3 ");
135 }
136 }