1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
|
/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.internal.util;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import androidx.test.runner.AndroidJUnit4;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
/**
* Tests for {@link ProcFileReader}.
*/
@RunWith(AndroidJUnit4.class)
public class ProcFileReaderTest {
@Test
public void testEmpty() throws Exception {
final ProcFileReader reader = buildReader("");
assertFalse(reader.hasMoreData());
try {
reader.finishLine();
fail("somehow finished line beyond end of stream?");
} catch (IOException e) {
// expected
}
assertFalse(reader.hasMoreData());
}
@Test
public void testSingleString() throws Exception {
final ProcFileReader reader = buildReader("a\nb\nc\n");
assertEquals("a", reader.nextString());
reader.finishLine();
assertTrue(reader.hasMoreData());
assertEquals("b", reader.nextString());
reader.finishLine();
assertTrue(reader.hasMoreData());
assertEquals("c", reader.nextString());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testMixedNumbersSkip() throws Exception {
final ProcFileReader reader = buildReader("1 2 3\n4 abc_def 5 6 7 8 9\n10\n");
assertEquals(1, reader.nextInt());
assertEquals(2, reader.nextInt());
assertEquals(3, reader.nextInt());
reader.finishLine();
assertTrue(reader.hasMoreData());
assertEquals(4, reader.nextInt());
assertEquals("abc_def", reader.nextString());
assertEquals(5, reader.nextInt());
reader.finishLine();
assertTrue(reader.hasMoreData());
assertEquals(10, reader.nextInt());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testBufferSize() throws Exception {
// read numbers using very small buffer size, exercising fillBuf()
final ProcFileReader reader = buildReader("1 21 3 41 5 61 7 81 9 10\n", 3);
assertEquals(1, reader.nextInt());
assertEquals(21, reader.nextInt());
assertEquals(3, reader.nextInt());
assertEquals(41, reader.nextInt());
assertEquals(5, reader.nextInt());
assertEquals(61, reader.nextInt());
assertEquals(7, reader.nextInt());
assertEquals(81, reader.nextInt());
assertEquals(9, reader.nextInt());
assertEquals(10, reader.nextInt());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testBlankLines() throws Exception {
final ProcFileReader reader = buildReader("1\n\n2\n\n3\n");
assertEquals(1, reader.nextInt());
reader.finishLine();
assertTrue(reader.hasMoreData());
reader.finishLine();
assertTrue(reader.hasMoreData());
assertEquals(2, reader.nextInt());
reader.finishLine();
assertTrue(reader.hasMoreData());
reader.finishLine();
assertTrue(reader.hasMoreData());
assertEquals(3, reader.nextInt());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testMinMax() throws Exception {
final ProcFileReader reader = buildReader(
"1 -1024 9223372036854775807 -9223372036854775808\n");
assertEquals(1, reader.nextLong());
assertEquals(-1024, reader.nextLong());
assertEquals(Long.MAX_VALUE, reader.nextLong());
assertEquals(Long.MIN_VALUE, reader.nextLong());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testDelimiterNeverFound() throws Exception {
final ProcFileReader reader = buildReader("teststringwithoutdelimiters");
try {
reader.nextString();
fail("somehow read a string value?");
} catch (IOException e) {
// expected
assertTrue(e.getMessage().contains("End of stream"));
}
}
@Test
public void testLargerThanBuffer() throws Exception {
// try finishing line larger than buffer
final ProcFileReader reader = buildReader("1 teststringlongerthanbuffer\n", 4);
assertEquals(1, reader.nextLong());
try {
reader.finishLine();
fail("somehow finished line?");
} catch (IOException e) {
// expected
assertTrue(e.getMessage().contains("already-full buffer"));
}
}
@Test
public void testOptionalLongs() throws Exception {
final ProcFileReader reader = buildReader("123 456\n789\n");
assertEquals(123L, reader.nextLong());
assertEquals(456L, reader.nextOptionalLong(-1L));
assertEquals(-1L, reader.nextOptionalLong(-1L));
assertEquals(-1L, reader.nextOptionalLong(-1L));
assertEquals(-1L, reader.nextOptionalLong(-1L));
reader.finishLine();
assertEquals(789L, reader.nextOptionalLong(-1L));
assertEquals(-1L, reader.nextOptionalLong(-1L));
}
@Test
public void testInvalidLongs() throws Exception {
final ProcFileReader reader = buildReader("12: 34\n56 78@#\n");
assertEquals(12L, reader.nextLong(true));
assertEquals(34L, reader.nextLong(true));
reader.finishLine();
assertTrue(reader.hasMoreData());
assertEquals(56L, reader.nextLong(true));
assertEquals(78L, reader.nextLong(true));
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testConsecutiveDelimiters() throws Exception {
final ProcFileReader reader = buildReader("1 2 3 4 5\n");
assertEquals(1L, reader.nextLong());
assertEquals(2L, reader.nextLong());
assertEquals(3L, reader.nextLong());
assertEquals(4L, reader.nextLong());
assertEquals(5L, reader.nextLong());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testBufferSizeWithConsecutiveDelimiters() throws Exception {
// Read numbers using very small buffer size, exercising fillBuf()
// Include more consecutive delimiters than the buffer size.
final ProcFileReader reader =
buildReader("1 21 3 41 5 61 7 81 9 10\n", 3);
assertEquals(1, reader.nextInt());
assertEquals(21, reader.nextInt());
assertEquals(3, reader.nextInt());
assertEquals(41, reader.nextInt());
assertEquals(5, reader.nextInt());
assertEquals(61, reader.nextInt());
assertEquals(7, reader.nextInt());
assertEquals(81, reader.nextInt());
assertEquals(9, reader.nextInt());
assertEquals(10, reader.nextInt());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testBufferSizeWithConsecutiveDelimitersAndMultipleLines() throws Exception {
final ProcFileReader reader =
buildReader("1 21 41 \n 5 7 81 \n 9 10 \n", 3);
assertEquals(1, reader.nextInt());
assertEquals(21, reader.nextInt());
assertEquals(41, reader.nextInt());
reader.finishLine();
assertEquals(5, reader.nextInt());
assertEquals(7, reader.nextInt());
assertEquals(81, reader.nextInt());
reader.finishLine();
assertEquals(9, reader.nextInt());
assertEquals(10, reader.nextInt());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testIgnore() throws Exception {
final ProcFileReader reader = buildReader("a b c\n");
assertEquals("a", reader.nextString());
assertTrue(reader.hasMoreData());
reader.nextIgnored();
assertTrue(reader.hasMoreData());
assertEquals("c", reader.nextString());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testRewind() throws Exception {
final ProcFileReader reader = buildReader("abc\n");
assertEquals("abc", reader.nextString());
reader.finishLine();
assertFalse(reader.hasMoreData());
reader.rewind();
assertTrue(reader.hasMoreData());
assertEquals("abc", reader.nextString());
reader.finishLine();
assertFalse(reader.hasMoreData());
}
@Test
public void testRewindFileInputStream() throws Exception {
File tempFile = File.createTempFile("procfile", null, null);
Files.write(tempFile.toPath(), "abc\n".getBytes(StandardCharsets.US_ASCII));
final ProcFileReader reader = new ProcFileReader(new FileInputStream(tempFile));
assertEquals("abc", reader.nextString());
reader.finishLine();
assertFalse(reader.hasMoreData());
reader.rewind();
assertTrue(reader.hasMoreData());
assertEquals("abc", reader.nextString());
reader.finishLine();
assertFalse(reader.hasMoreData());
Files.delete(tempFile.toPath());
}
private static ProcFileReader buildReader(String string) throws IOException {
return buildReader(string, 2048);
}
private static ProcFileReader buildReader(String string, int bufferSize) throws IOException {
return new ProcFileReader(
new ByteArrayInputStream(string.getBytes(StandardCharsets.US_ASCII)), bufferSize);
}
}
|
