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1
28
29 package org.jruby.util;
30
31 import java.io.UnsupportedEncodingException  ;
32 import java.util.Arrays ;
33
34 import junit.framework.TestCase;
35
36 public class ByteListTest extends TestCase {
37 public void testEmptyByteListHasZeroLength() {
38 assertEquals(0, new ByteList().length());
39 assertEquals(0, new ByteList(32).length());
40 }
41
42 public void testByteListWithInitialByteArray() {
43 byte[] bytes = new byte[] {0x0f, 0x01, 0x02, 0x03, 0x04, 0x05};
44
45 ByteList b = new ByteList(bytes);
46 assertEquals(bytes.length, b.length());
47 b.set(0, 0x00);
48 assertEquals(0x0f, bytes[0]);
49 assertEquals(0x00, b.get(0));
50
51 ByteList b2 = new ByteList(b);
52 assertEquals(b.length(), b2.length());
53 b2.set(0, 0x0f);
54 assertEquals(0x0f, b2.get(0));
55 assertEquals(0x00, b.get(0));
56 }
57
58 public void testByteListWithSubrangeOfInitialBytes() {
59 byte[] bytes = new byte[] {0x0f, 0x01, 0x02, 0x03, 0x04, 0x05};
60 ByteList b = new ByteList(bytes, 2, 2);
61 assertEquals(2, b.length());
62 assertEquals(0x02, b.get(0));
63 assertEquals(0x03, b.get(1));
64
65 ByteList b2 = new ByteList(b, 1, 1);
66 assertEquals(1, b2.length());
67 assertEquals(0x03, b2.get(0));
68 }
69
70 public void testByteListAppendSingleByte() {
71 byte[] bytes = new byte[] {0x0f, 0x01, 0x02, 0x03, 0x04, 0x05};
72 ByteList b = new ByteList(1);
73
74 for (int i = 0; i < bytes.length; i++) {
75 b.append(bytes[i]);
76 }
77
78 assertEquals(new ByteList(bytes), b);
79 }
80
81 public void testByteListAppendSingleIntTruncates() {
82 int[] ints = new int[] { 0x1001, 0x1002, 0x1003 };
83
84 ByteList b = new ByteList(1);
85 for (int i = 0; i < ints.length; i++) {
86 b.append(ints[i]);
87 }
88
89 assertEquals(0x01, b.get(0));
90 assertEquals(0x02, b.get(1));
91 assertEquals(0x03, b.get(2));
92 }
93
94 public void testByteListPrependSingleByte() {
95 byte[] bytes = new byte[] {0x01, 0x02, 0x03};
96 ByteList b = new ByteList(1);
97
98 for (int i = 0; i < bytes.length; i++) {
99 b.prepend(bytes[i]);
100 }
101
102 assertEquals(0x03, b.get(0));
103 assertEquals(0x02, b.get(1));
104 assertEquals(0x01, b.get(2));
105
106 bytes = new byte[] {0x0f, 0x01, 0x02, 0x03, 0x04, 0x05};
107 b = new ByteList(bytes);
108 b.prepend((byte) 0x0e);
109 assertEquals(7, b.length());
110 assertEquals(0x0e, b.get(0));
111 assertEquals(0x05, b.get(6));
112 }
113
114 public void testByteListAppendArray() {
115 ByteList b = new ByteList(1);
116
117 b.append(new byte[] {0x01, 0x02, 0x03});
118
119 assertEquals(3, b.length());
120 assertEquals(0x01, b.get(0));
121 assertEquals(0x02, b.get(1));
122 assertEquals(0x03, b.get(2));
123 }
124
125 public void testByteListAppendArrayIndexLength() {
126 ByteList b = new ByteList(1);
127
128 b.append(new byte[] {0x0f, 0x01, 0x02, 0x03, 0x04, 0x05}, 1, 4);
129 assertEquals(4, b.length());
130 assertEquals(0x01, b.get(0));
131 assertEquals(0x02, b.get(1));
132 assertEquals(0x03, b.get(2));
133 assertEquals(0x04, b.get(3));
134 }
135
136 public void testLengthExpandFillsWithZeros() {
137 ByteList b = new ByteList();
138 b.length(10);
139 assertEquals(0, b.get(9));
140 }
141
142 public void testGetAndSetOutsideOfLengthShouldFail() {
143 ByteList b = new ByteList(10);
144 assertEquals(0, b.length());
145 try {
146 b.get(0);
147 fail("should throw IndexOfOfBoundsException");
148 } catch (IndexOutOfBoundsException oob) {
149 }
150 try {
151 b.set(0, 1);
152 fail("should throw IndexOfOfBoundsException");
153 } catch (IndexOutOfBoundsException oob) {
154 }
155 }
156
157 public void testMethodsThatTakeByteArrayDoNotAllowNull() {
158 ByteList b = new ByteList();
159 try {
160 new ByteList((byte[]) null);
161 fail("should throw NPE");
162 } catch (NullPointerException npe) {
163 }
164 try {
165 new ByteList((byte[]) null, 0, 0);
166 fail("should throw NPE");
167 } catch (NullPointerException npe) {
168 }
169 try {
170 b.append((byte[])null);
171 fail("should throw NPE");
172 } catch (NullPointerException npe) {
173 }
174 try {
175 b.append((byte[])null, 0, 0);
176 fail("should throw NPE");
177 } catch (NullPointerException npe) {
178 }
179 try {
180 b.replace(null);
181 fail("should throw NPE");
182 } catch (NullPointerException npe) {
183 }
184 }
185
186 public void testReplaceSetsNewContents() {
187 ByteList b = new ByteList(1);
188
189 b.replace(new byte[] {0x01, 0x02, 0x03, 0x04, 0x05});
190 assertEquals(5, b.length());
191 assertEquals(0x01, b.get(0));
192 assertEquals(0x05, b.get(4));
193 }
194
195 public void testReplaceIndexOffset() {
196 ByteList base = new ByteList(new byte[] {0x01,0x02,0x03});
197 ByteList b = (ByteList) base.clone();
198 b.replace(1, 1, new byte[] {0x04,0x05});
199 assertEquals(new ByteList(new byte[] {0x01,0x04,0x05,0x03}), b);
200 b = (ByteList) base.clone();
201 b.replace(0, 3, new byte[] {0x00, 0x00, 0x00}, 1, 2);
202 assertEquals(new ByteList(new byte[] {0x00, 0x00}), b);
203 }
204
205 private ByteList S(String s) throws UnsupportedEncodingException {
206 return new ByteList(s.getBytes("ISO8859_1"));
207 }
208 private String S(ByteList b) throws UnsupportedEncodingException {
209 return new String (b.bytes(), "ISO8859_1");
210 }
211
212 public void testReplaceStrings() throws UnsupportedEncodingException {
213 ByteList b = S("FooBar");
214 b.replace(0, 3, S("A"));
215 assertEquals("ABar", S(b));
216 b.replace(0, 1, S("Foo"));
217 assertEquals("FooBar", S(b));
218 b.replace(1, 2, S("zz"));
219 assertEquals("FzzBar", S(b));
220 b.replace(1, 0, S("u"));
221 assertEquals("FuzzBar", S(b));
222 }
223
224 public void testReplaceLengthOutOfBounds() {
225 ByteList b = new ByteList(new byte[] {0x01,0x02,0x03});
226 try {
227 b.replace(0, 5, new byte[] { 0x00, 0x00, 0x00 }, 1, 2);
228 fail("should have thrown exception");
229 } catch (IndexOutOfBoundsException e) {
230 }
231 }
232
233 public void testEquals() {
234 assertTrue(new ByteList().equals(new ByteList(10)));
235 assertFalse(new ByteList().equals(new ByteList(new byte[] {0x01})));
236 byte[] bytes = new byte[] {0x01, 0x02, 0x03, 0x04};
237 ByteList b1 = new ByteList(bytes);
238 ByteList b2 = new ByteList();
239 b2.append(bytes);
240 assertTrue(b1.equals(b2));
241 }
242
243 public void testBytesCreatesACopyOfInternalBytes() {
244 byte[] bytes = new byte[] {0x01,0x02,0x03};
245 ByteList b = new ByteList(bytes);
246 byte[] copy = b.bytes();
247 assertTrue(Arrays.equals(bytes, copy));
248 b.set(1, 0);
249 assertTrue(Arrays.equals(bytes, copy));
250 }
251
252 public void testCloneCopiesBytes() {
253 ByteList b = new ByteList(new byte[] {0x01,0x02,0x03});
254 ByteList b2 = (ByteList) b.clone();
255 b.set(1, 0);
256 assertFalse(b.equals(b2));
257 }
258 }
259 |
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