test/test_buffer.cpp@d3100c987a39
test/test_buffer.cpp
Mon, 25 Jul 2022 14:16:49 +0200
- author
- Mike Becker <universe@uap-core.de>
- date
- Mon, 25 Jul 2022 14:16:49 +0200
- changeset 566
- d3100c987a39
- parent 565
- d756746ea94f
- child 567
- f90a7cfe2480
- permissions
- -rw-r--r--
fix two tests reading one byte too much
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
29 #include "cx/buffer.h"
31 #include <gtest/gtest.h>
32 #include "util_allocator.h"
34 class BufferFixture : public ::testing::Test {
35 protected:
36 void SetUp() override {
37 cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
38 buf.size = 6;
39 buf.pos = 3;
40 }
42 void TearDown() override {
43 cxBufferDestroy(&buf);
44 }
46 CxBuffer buf{};
47 };
49 static void expect_default_flush_config(CxBuffer *buf) {
50 EXPECT_EQ(buf->flush_blkmax, 0);
51 EXPECT_EQ(buf->flush_blksize, 4096);
52 EXPECT_EQ(buf->flush_threshold, SIZE_MAX);
53 EXPECT_EQ(buf->flush_func, nullptr);
54 EXPECT_EQ(buf->flush_target, nullptr);
55 }
57 TEST(BufferInit, WrapSpace) {
58 CxTestingAllocator alloc;
59 CxBuffer buf;
60 void *space = cxMalloc(&alloc, 16);
61 cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_DEFAULT);
62 expect_default_flush_config(&buf);
63 EXPECT_EQ(buf.space, space);
64 EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
65 EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0);
66 EXPECT_EQ(buf.pos, 0);
67 EXPECT_EQ(buf.size, 0);
68 EXPECT_EQ(buf.capacity, 16);
69 EXPECT_EQ(buf.allocator, &alloc);
70 cxBufferDestroy(&buf);
71 EXPECT_FALSE(alloc.verify());
72 cxFree(&alloc, space);
73 EXPECT_TRUE(alloc.verify());
74 }
76 TEST(BufferInit, WrapSpaceAutoExtend) {
77 CxTestingAllocator alloc;
78 CxBuffer buf;
79 void *space = cxMalloc(&alloc, 16);
80 cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_AUTO_EXTEND);
81 expect_default_flush_config(&buf);
82 EXPECT_EQ(buf.space, space);
83 EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, CX_BUFFER_AUTO_EXTEND);
84 EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0);
85 EXPECT_EQ(buf.pos, 0);
86 EXPECT_EQ(buf.size, 0);
87 EXPECT_EQ(buf.capacity, 16);
88 EXPECT_EQ(buf.allocator, &alloc);
89 cxBufferDestroy(&buf);
90 EXPECT_FALSE(alloc.verify());
91 cxFree(&alloc, space);
92 EXPECT_TRUE(alloc.verify());
93 }
95 TEST(BufferInit, WrapSpaceAutoFree) {
96 CxTestingAllocator alloc;
97 CxBuffer buf;
98 void *space = cxMalloc(&alloc, 16);
99 cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_FREE_CONTENTS);
100 expect_default_flush_config(&buf);
101 EXPECT_EQ(buf.space, space);
102 EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
103 EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS);
104 EXPECT_EQ(buf.pos, 0);
105 EXPECT_EQ(buf.size, 0);
106 EXPECT_EQ(buf.capacity, 16);
107 EXPECT_EQ(buf.allocator, &alloc);
108 EXPECT_FALSE(alloc.verify());
109 cxBufferDestroy(&buf);
110 EXPECT_TRUE(alloc.verify());
111 }
113 TEST(BufferInit, FreshSpace) {
114 CxTestingAllocator alloc;
115 CxBuffer buf;
116 cxBufferInit(&buf, nullptr, 8, &alloc, CX_BUFFER_DEFAULT);
117 expect_default_flush_config(&buf);
118 EXPECT_NE(buf.space, nullptr);
119 EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
120 EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS);
121 EXPECT_EQ(buf.pos, 0);
122 EXPECT_EQ(buf.size, 0);
123 EXPECT_EQ(buf.capacity, 8);
124 EXPECT_EQ(buf.allocator, &alloc);
125 EXPECT_FALSE(alloc.verify()); // space is still allocated
126 cxBufferDestroy(&buf);
127 EXPECT_TRUE(alloc.verify());
128 }
130 class BufferShiftFixture : public ::testing::Test {
131 protected:
132 void SetUp() override {
133 ASSERT_TRUE(alloc.verify());
134 cxBufferInit(&buf, nullptr, 16, &alloc, CX_BUFFER_DEFAULT);
135 memcpy(buf.space, "test____________", 16);
136 buf.capacity = 8; // purposely pretend that the buffer has less capacity s.t. we can test beyond the range
137 buf.pos = 4;
138 buf.size = 4;
139 }
141 void TearDown() override {
142 cxBufferDestroy(&buf);
143 EXPECT_TRUE(alloc.verify());
144 }
146 CxTestingAllocator alloc;
147 CxBuffer buf{};
148 };
150 class BufferShiftLeft : public BufferShiftFixture {
151 };
153 TEST_F(BufferShiftLeft, Zero) {
154 ASSERT_EQ(buf.pos, 4);
155 ASSERT_EQ(buf.size, 4);
156 int ret = cxBufferShiftLeft(&buf, 0);
157 EXPECT_EQ(ret, 0);
158 EXPECT_EQ(buf.pos, 4);
159 EXPECT_EQ(buf.size, 4);
160 EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
161 }
163 TEST_F(BufferShiftLeft, ZeroOffsetInterface) {
164 ASSERT_EQ(buf.pos, 4);
165 ASSERT_EQ(buf.size, 4);
166 int ret = cxBufferShift(&buf, -0);
167 EXPECT_EQ(ret, 0);
168 EXPECT_EQ(buf.pos, 4);
169 EXPECT_EQ(buf.size, 4);
170 EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
171 }
173 TEST_F(BufferShiftLeft, Standard) {
174 ASSERT_EQ(buf.pos, 4);
175 ASSERT_EQ(buf.size, 4);
176 int ret = cxBufferShiftLeft(&buf, 2);
177 EXPECT_EQ(ret, 0);
178 EXPECT_EQ(buf.pos, 2);
179 EXPECT_EQ(buf.size, 2);
180 EXPECT_TRUE(memcmp(buf.space, "stst________", 8) == 0);
181 }
183 TEST_F(BufferShiftLeft, Overshift) {
184 ASSERT_LT(buf.pos, 6);
185 ASSERT_LT(buf.size, 6);
186 int ret = cxBufferShiftLeft(&buf, 6);
187 EXPECT_EQ(ret, 0);
188 EXPECT_EQ(buf.pos, 0);
189 EXPECT_EQ(buf.size, 0);
190 EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
191 }
193 TEST_F(BufferShiftLeft, OvershiftPosOnly) {
194 buf.pos = 2;
195 ASSERT_EQ(buf.size, 4);
196 int ret = cxBufferShiftLeft(&buf, 3);
197 EXPECT_EQ(ret, 0);
198 EXPECT_EQ(buf.pos, 0);
199 EXPECT_EQ(buf.size, 1);
200 EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
201 }
203 TEST_F(BufferShiftLeft, OffsetInterface) {
204 buf.pos = 3;
205 ASSERT_EQ(buf.size, 4);
206 int ret = cxBufferShift(&buf, -2);
207 EXPECT_EQ(ret, 0);
208 EXPECT_EQ(buf.pos, 1);
209 EXPECT_EQ(buf.size, 2);
210 EXPECT_TRUE(memcmp(buf.space, "stst________", 8) == 0);
211 }
213 class BufferShiftRight : public BufferShiftFixture {
214 };
216 TEST_F(BufferShiftRight, Zero) {
217 ASSERT_EQ(buf.pos, 4);
218 ASSERT_EQ(buf.size, 4);
219 int ret = cxBufferShiftRight(&buf, 0);
220 EXPECT_EQ(ret, 0);
221 EXPECT_EQ(buf.pos, 4);
222 EXPECT_EQ(buf.size, 4);
223 EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
224 }
226 TEST_F(BufferShiftRight, ZeroOffsetInterface) {
227 ASSERT_EQ(buf.pos, 4);
228 ASSERT_EQ(buf.size, 4);
229 int ret = cxBufferShift(&buf, +0);
230 EXPECT_EQ(ret, 0);
231 EXPECT_EQ(buf.pos, 4);
232 EXPECT_EQ(buf.size, 4);
233 EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
234 }
236 TEST_F(BufferShiftRight, Standard) {
237 ASSERT_EQ(buf.pos, 4);
238 ASSERT_EQ(buf.size, 4);
239 int ret = cxBufferShiftRight(&buf, 3);
240 EXPECT_EQ(ret, 0);
241 EXPECT_EQ(buf.pos, 7);
242 EXPECT_EQ(buf.size, 7);
243 EXPECT_TRUE(memcmp(buf.space, "testest_____", 8) == 0);
244 }
246 TEST_F(BufferShiftRight, OvershiftDiscard) {
247 ASSERT_EQ(buf.pos, 4);
248 ASSERT_EQ(buf.size, 4);
249 ASSERT_EQ(buf.capacity, 8);
250 int ret = cxBufferShiftRight(&buf, 6);
251 EXPECT_EQ(ret, 0);
252 EXPECT_EQ(buf.pos, 8);
253 EXPECT_EQ(buf.size, 8);
254 EXPECT_EQ(buf.capacity, 8);
255 EXPECT_TRUE(memcmp(buf.space, "test__te____", 8) == 0);
256 }
258 TEST_F(BufferShiftRight, OvershiftExtend) {
259 ASSERT_EQ(buf.pos, 4);
260 ASSERT_EQ(buf.size, 4);
261 ASSERT_EQ(buf.capacity, 8);
262 buf.flags |= CX_BUFFER_AUTO_EXTEND;
263 int ret = cxBufferShiftRight(&buf, 6);
264 EXPECT_EQ(ret, 0);
265 EXPECT_EQ(buf.pos, 10);
266 EXPECT_EQ(buf.size, 10);
267 EXPECT_GE(buf.capacity, 10);
268 EXPECT_TRUE(memcmp(buf.space, "test__test__", 8) == 0);
269 }
271 TEST_F(BufferShiftRight, OffsetInterface) {
272 buf.pos = 3;
273 ASSERT_EQ(buf.size, 4);
274 int ret = cxBufferShift(&buf, 2);
275 EXPECT_EQ(ret, 0);
276 EXPECT_EQ(buf.pos, 5);
277 EXPECT_EQ(buf.size, 6);
278 EXPECT_TRUE(memcmp(buf.space, "tetest______", 8) == 0);
279 }
281 TEST(BufferMinimumCapacity, Sufficient) {
282 CxTestingAllocator alloc;
283 auto space = cxMalloc(&alloc, 8);
284 CxBuffer buf;
285 cxBufferInit(&buf, space, 8, &alloc, CX_BUFFER_FREE_CONTENTS);
286 memcpy(space, "Testing", 8);
287 buf.size = 8;
288 cxBufferMinimumCapacity(&buf, 6);
289 EXPECT_EQ(buf.capacity, 8);
290 EXPECT_EQ(buf.size, 8);
291 EXPECT_TRUE(memcmp(buf.space, "Testing", 8) == 0);
292 cxBufferDestroy(&buf);
293 EXPECT_TRUE(alloc.verify());
294 }
296 TEST(BufferMinimumCapacity, Extend) {
297 CxTestingAllocator alloc;
298 auto space = cxMalloc(&alloc, 8);
299 CxBuffer buf;
300 cxBufferInit(&buf, space, 8, &alloc, CX_BUFFER_FREE_CONTENTS); // NO auto extend!
301 memcpy(space, "Testing", 8);
302 buf.size = 8;
303 cxBufferMinimumCapacity(&buf, 16);
304 EXPECT_EQ(buf.capacity, 16);
305 EXPECT_EQ(buf.size, 8);
306 EXPECT_TRUE(memcmp(buf.space, "Testing", 8) == 0);
307 cxBufferDestroy(&buf);
308 EXPECT_TRUE(alloc.verify());
309 }
311 TEST(BufferClear, Test) {
312 char space[16];
313 strcpy(space, "clear test");
314 CxBuffer buf;
315 cxBufferInit(&buf, space, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
316 ASSERT_EQ(buf.size, 0);
317 // only clear the used part of the buffer
318 cxBufferClear(&buf);
319 EXPECT_EQ(memcmp(space, "clear test", 10), 0);
320 buf.size = 5;
321 buf.pos = 3;
322 cxBufferClear(&buf);
323 EXPECT_EQ(memcmp(space, "\0\0\0\0\0 test", 10), 0);
324 EXPECT_EQ(buf.size, 0);
325 EXPECT_EQ(buf.pos, 0);
326 cxBufferDestroy(&buf);
327 }
329 class BufferWrite : public ::testing::Test {
330 protected:
331 CxBuffer buf{}, target{};
333 void SetUp() override {
334 cxBufferInit(&target, nullptr, 16, cxDefaultAllocator, CX_BUFFER_AUTO_EXTEND);
335 cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
336 buf.capacity = 8; // artificially reduce capacity to check OOB writes
337 memset(buf.space, 0, 16);
338 memcpy(buf.space, "prep", 4);
339 buf.size = buf.pos = 4;
340 }
342 void TearDown() override {
343 cxBufferDestroy(&buf);
344 cxBufferDestroy(&target);
345 }
347 void enableFlushing() {
348 buf.flush_target = ⌖
349 buf.flush_func = reinterpret_cast<cx_write_func>(cxBufferWrite);
350 buf.flush_blkmax = 1;
351 }
352 };
354 TEST_F(BufferWrite, SizeOneFit) {
355 const char *data = "test";
356 ASSERT_EQ(buf.capacity, 8);
357 ASSERT_EQ(buf.pos, 4);
358 ASSERT_EQ(buf.size, 4);
359 size_t written = cxBufferWrite(data, 1, 4, &buf);
360 EXPECT_EQ(written, 4);
361 EXPECT_EQ(buf.size, 8);
362 EXPECT_EQ(buf.pos, 8);
363 EXPECT_EQ(buf.capacity, 8);
364 EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
365 }
367 TEST_F(BufferWrite, SizeOneDiscard) {
368 const char *data = "testing";
369 ASSERT_EQ(buf.capacity, 8);
370 ASSERT_EQ(buf.pos, 4);
371 ASSERT_EQ(buf.size, 4);
372 size_t written = cxBufferWrite(data, 1, 7, &buf);
373 EXPECT_EQ(written, 4);
374 EXPECT_EQ(buf.size, 8);
375 EXPECT_EQ(buf.pos, 8);
376 EXPECT_EQ(buf.capacity, 8);
377 EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0);
378 }
380 TEST_F(BufferWrite, SizeOneExtend) {
381 buf.flags |= CX_BUFFER_AUTO_EXTEND;
382 const char *data = "testing";
383 ASSERT_EQ(buf.capacity, 8);
384 ASSERT_EQ(buf.pos, 4);
385 ASSERT_EQ(buf.size, 4);
386 size_t written = cxBufferWrite(data, 1, 7, &buf);
387 EXPECT_EQ(written, 7);
388 EXPECT_EQ(buf.size, 11);
389 EXPECT_EQ(buf.pos, 11);
390 EXPECT_GE(buf.capacity, 11);
391 EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0);
392 }
394 TEST_F(BufferWrite, MultibyteFit) {
395 const char *data = "test";
396 ASSERT_EQ(buf.capacity, 8);
397 ASSERT_EQ(buf.pos, 4);
398 ASSERT_EQ(buf.size, 4);
399 size_t written = cxBufferWrite(data, 2, 2, &buf);
400 EXPECT_EQ(written, 2);
401 EXPECT_EQ(buf.size, 8);
402 EXPECT_EQ(buf.pos, 8);
403 EXPECT_EQ(buf.capacity, 8);
404 EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
405 }
407 TEST_F(BufferWrite, MultibyteDiscard) {
408 const char *data = "testing";
409 ASSERT_EQ(buf.capacity, 8);
410 ASSERT_EQ(buf.size, 4);
411 buf.pos = 3;
412 size_t written = cxBufferWrite(data, 2, 4, &buf);
413 // remember: whole elements are discarded if they do not fit
414 EXPECT_EQ(written, 2);
415 EXPECT_EQ(buf.size, 7);
416 EXPECT_EQ(buf.pos, 7);
417 EXPECT_EQ(buf.capacity, 8);
418 EXPECT_EQ(memcmp(buf.space, "pretest\0", 8), 0);
419 }
421 TEST_F(BufferWrite, MultibyteExtend) {
422 buf.flags |= CX_BUFFER_AUTO_EXTEND;
423 const char *data = "tester";
424 ASSERT_EQ(buf.capacity, 8);
425 ASSERT_EQ(buf.size, 4);
426 buf.pos = 3;
427 size_t written = cxBufferWrite(data, 2, 3, &buf);
428 // remember: whole elements are discarded if they do not fit
429 EXPECT_EQ(written, 3);
430 EXPECT_EQ(buf.size, 9);
431 EXPECT_EQ(buf.pos, 9);
432 EXPECT_GE(buf.capacity, 9);
433 EXPECT_EQ(memcmp(buf.space, "pretester", 9), 0);
434 }
436 TEST_F(BufferWrite, PutcWrapperFit) {
437 ASSERT_EQ(buf.capacity, 8);
438 ASSERT_EQ(buf.pos, 4);
439 ASSERT_EQ(buf.size, 4);
440 int c = cxBufferPut(&buf, 0x200 | 'a');
441 EXPECT_EQ(c, 'a');
442 EXPECT_EQ(buf.size, 5);
443 EXPECT_EQ(buf.pos, 5);
444 EXPECT_EQ(buf.capacity, 8);
445 EXPECT_EQ(memcmp(buf.space, "prepa\0", 6), 0);
446 }
448 TEST_F(BufferWrite, PutcWrapperDiscard) {
449 ASSERT_EQ(buf.capacity, 8);
450 ASSERT_EQ(buf.size, 4);
451 buf.pos = 8;
452 int c = cxBufferPut(&buf, 0x200 | 'a');
453 EXPECT_EQ(c, EOF);
454 EXPECT_EQ(buf.size, 4);
455 EXPECT_EQ(buf.pos, 8);
456 EXPECT_EQ(buf.capacity, 8);
457 EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0\0", 9), 0);
458 }
460 TEST_F(BufferWrite, PutcWrapperExtend) {
461 buf.flags |= CX_BUFFER_AUTO_EXTEND;
462 ASSERT_EQ(buf.capacity, 8);
463 ASSERT_EQ(buf.size, 4);
464 buf.pos = 8;
465 int c = cxBufferPut(&buf, 0x200 | 'a');
466 EXPECT_EQ(c, 'a');
467 EXPECT_EQ(buf.size, 9);
468 EXPECT_EQ(buf.pos, 9);
469 EXPECT_GE(buf.capacity, 9);
470 EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0a", 9), 0);
471 }
473 TEST_F(BufferWrite, PutStringWrapperFit) {
474 const char *data = "test";
475 ASSERT_EQ(buf.capacity, 8);
476 ASSERT_EQ(buf.pos, 4);
477 ASSERT_EQ(buf.size, 4);
478 size_t written = cxBufferPutString(&buf, data);
479 EXPECT_EQ(written, 4);
480 EXPECT_EQ(buf.size, 8);
481 EXPECT_EQ(buf.pos, 8);
482 EXPECT_EQ(buf.capacity, 8);
483 EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
484 }
486 TEST_F(BufferWrite, PutStringWrapperDiscard) {
487 const char *data = "testing";
488 ASSERT_EQ(buf.capacity, 8);
489 ASSERT_EQ(buf.pos, 4);
490 ASSERT_EQ(buf.size, 4);
491 size_t written = cxBufferPutString(&buf, data);
492 EXPECT_EQ(written, 4);
493 EXPECT_EQ(buf.size, 8);
494 EXPECT_EQ(buf.pos, 8);
495 EXPECT_EQ(buf.capacity, 8);
496 EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0);
497 }
499 TEST_F(BufferWrite, PutStringWrapperExtend) {
500 buf.flags |= CX_BUFFER_AUTO_EXTEND;
501 const char *data = "testing";
502 ASSERT_EQ(buf.capacity, 8);
503 ASSERT_EQ(buf.pos, 4);
504 ASSERT_EQ(buf.size, 4);
505 size_t written = cxBufferPutString(&buf, data);
506 EXPECT_EQ(written, 7);
507 EXPECT_EQ(buf.size, 11);
508 EXPECT_EQ(buf.pos, 11);
509 EXPECT_GE(buf.capacity, 11);
510 EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0);
511 }
513 TEST_F(BufferWrite, MultOverflow) {
514 const char *data = "testing";
515 ASSERT_EQ(buf.capacity, 8);
516 ASSERT_EQ(buf.pos, 4);
517 ASSERT_EQ(buf.size, 4);
518 size_t written = cxBufferWrite(data, 8, SIZE_MAX / 4, &buf);
519 EXPECT_EQ(written, 0);
520 EXPECT_EQ(buf.capacity, 8);
521 EXPECT_EQ(buf.pos, 4);
522 EXPECT_EQ(buf.size, 4);
523 EXPECT_EQ(memcmp(buf.space, "prep\0", 5), 0);
524 }
526 TEST_F(BufferWrite, MaxCapaOverflow) {
527 buf.flags |= CX_BUFFER_AUTO_EXTEND;
528 const char *data = "testing";
529 ASSERT_EQ(buf.capacity, 8);
530 ASSERT_EQ(buf.pos, 4);
531 ASSERT_EQ(buf.size, 4);
532 size_t written = cxBufferWrite(data, 1, SIZE_MAX - 2, &buf);
533 EXPECT_EQ(written, 0);
534 EXPECT_EQ(buf.capacity, 8);
535 EXPECT_EQ(buf.pos, 4);
536 EXPECT_EQ(buf.size, 4);
537 EXPECT_EQ(memcmp(buf.space, "prep\0", 5), 0);
538 }
540 TEST_F(BufferWrite, OnlyOverwrite) {
541 buf.flags |= CX_BUFFER_AUTO_EXTEND;
542 ASSERT_EQ(buf.capacity, 8);
543 memcpy(buf.space, "preptest", 8);
544 buf.pos = 3;
545 buf.size = 8;
546 size_t written = cxBufferWrite("XXX", 2, 2, &buf);
547 EXPECT_EQ(written, 2);
548 EXPECT_EQ(buf.capacity, 8);
549 EXPECT_EQ(buf.size, 8);
550 EXPECT_EQ(buf.pos, 7);
551 EXPECT_EQ(memcmp(buf.space, "preXXX\0t", 8), 0);
552 }
554 TEST_F(BufferWrite, FlushAtCapacity) {
555 enableFlushing();
556 ASSERT_EQ(buf.capacity, 8);
557 ASSERT_EQ(buf.pos, 4);
558 size_t written = cxBufferWrite("foo", 1, 3, &buf);
559 EXPECT_EQ(written, 3);
560 ASSERT_EQ(buf.pos, 7);
561 ASSERT_EQ(buf.size, 7);
562 ASSERT_EQ(target.pos, 0);
563 ASSERT_EQ(target.size, 0);
564 written = cxBufferWrite("hello", 1, 5, &buf);
565 EXPECT_EQ(written, 5);
566 EXPECT_EQ(buf.pos, 0);
567 EXPECT_EQ(buf.size, 0);
568 EXPECT_EQ(buf.capacity, 8);
569 EXPECT_EQ(target.pos, 12);
570 ASSERT_EQ(target.size, 12);
571 EXPECT_EQ(memcmp(target.space, "prepfoohello", 12), 0);
572 }
574 TEST_F(BufferWrite, FlushAtThreshold) {
575 enableFlushing();
576 buf.flush_threshold = 12;
577 buf.flags |= CX_BUFFER_AUTO_EXTEND;
578 ASSERT_EQ(buf.capacity, 8);
579 ASSERT_EQ(buf.pos, 4);
580 size_t written = cxBufferWrite("foobar", 1, 6, &buf);
581 EXPECT_EQ(written, 6);
582 ASSERT_EQ(buf.pos, 10);
583 ASSERT_EQ(buf.size, 10);
584 ASSERT_GE(buf.capacity, 10);
585 ASSERT_LE(buf.capacity, 12);
586 ASSERT_EQ(target.pos, 0);
587 ASSERT_EQ(target.size, 0);
588 written = cxBufferWrite("hello", 1, 5, &buf);
589 EXPECT_EQ(written, 5);
590 EXPECT_EQ(buf.pos, 0);
591 EXPECT_EQ(buf.size, 0);
592 EXPECT_LE(buf.capacity, 12);
593 EXPECT_EQ(target.pos, 15);
594 ASSERT_EQ(target.size, 15);
595 EXPECT_EQ(memcmp(target.space, "prepfoobarhello", 15), 0);
596 }
598 class BufferSeek : public BufferFixture {
599 };
601 TEST_F(BufferSeek, SetZero) {
602 int result = cxBufferSeek(&buf, 0, SEEK_SET);
603 EXPECT_EQ(result, 0);
604 EXPECT_EQ(buf.pos, 0);
605 }
607 TEST_F(BufferSeek, SetValid) {
608 int result = cxBufferSeek(&buf, 5, SEEK_SET);
609 EXPECT_EQ(result, 0);
610 EXPECT_EQ(buf.pos, 5);
611 }
613 TEST_F(BufferSeek, SetInvalid) {
614 ASSERT_EQ(buf.pos, 3);
615 int result = cxBufferSeek(&buf, 6, SEEK_SET);
616 EXPECT_NE(result, 0);
617 EXPECT_EQ(buf.pos, 3);
618 }
620 TEST_F(BufferSeek, CurZero) {
621 ASSERT_EQ(buf.pos, 3);
622 int result = cxBufferSeek(&buf, 0, SEEK_CUR);
623 EXPECT_EQ(result, 0);
624 EXPECT_EQ(buf.pos, 3);
625 }
627 TEST_F(BufferSeek, CurValidPositive) {
628 ASSERT_EQ(buf.pos, 3);
629 int result = cxBufferSeek(&buf, 2, SEEK_CUR);
630 EXPECT_EQ(result, 0);
631 EXPECT_EQ(buf.pos, 5);
632 }
634 TEST_F(BufferSeek, CurValidNegative) {
635 ASSERT_EQ(buf.pos, 3);
636 int result = cxBufferSeek(&buf, -3, SEEK_CUR);
637 EXPECT_EQ(result, 0);
638 EXPECT_EQ(buf.pos, 0);
639 }
641 TEST_F(BufferSeek, CurInvalidPositive) {
642 ASSERT_EQ(buf.pos, 3);
643 int result = cxBufferSeek(&buf, 3, SEEK_CUR);
644 EXPECT_NE(result, 0);
645 EXPECT_EQ(buf.pos, 3);
646 }
648 TEST_F(BufferSeek, CurInvalidNegative) {
649 ASSERT_EQ(buf.pos, 3);
650 int result = cxBufferSeek(&buf, -4, SEEK_CUR);
651 EXPECT_NE(result, 0);
652 EXPECT_EQ(buf.pos, 3);
653 }
655 TEST_F(BufferSeek, EndZero) {
656 ASSERT_EQ(buf.size, 6);
657 int result = cxBufferSeek(&buf, 0, SEEK_END);
658 // the (past-the-)end position is always invalid
659 EXPECT_NE(result, 0);
660 EXPECT_EQ(buf.pos, 3);
661 }
663 TEST_F(BufferSeek, EndValid) {
664 ASSERT_EQ(buf.size, 6);
665 int result = cxBufferSeek(&buf, -6, SEEK_END);
666 EXPECT_EQ(result, 0);
667 EXPECT_EQ(buf.pos, 0);
668 }
670 TEST_F(BufferSeek, EndInvalid) {
671 ASSERT_EQ(buf.size, 6);
672 int result = cxBufferSeek(&buf, 1, SEEK_END);
673 EXPECT_NE(result, 0);
674 EXPECT_EQ(buf.pos, 3);
675 }
677 TEST_F(BufferSeek, WhenceInvalid) {
678 ASSERT_EQ(buf.size, 6);
679 ASSERT_EQ(buf.pos, 3);
680 int result = cxBufferSeek(&buf, 2, 9000);
681 EXPECT_NE(result, 0);
682 EXPECT_EQ(buf.size, 6);
683 EXPECT_EQ(buf.pos, 3);
684 }
686 class BufferEof : public BufferFixture {
687 };
689 TEST_F(BufferEof, Reached) {
690 buf.pos = buf.size;
691 EXPECT_TRUE(cxBufferEof(&buf));
692 buf.pos = buf.size - 1;
693 ASSERT_FALSE(cxBufferEof(&buf));
694 cxBufferPut(&buf, 'a');
695 EXPECT_TRUE(cxBufferEof(&buf));
696 }
698 TEST_F(BufferEof, NotReached) {
699 buf.pos = buf.size - 1;
700 EXPECT_FALSE(cxBufferEof(&buf));
701 buf.pos = 0;
702 cxBufferWrite("test", 1, 5, &buf);
703 EXPECT_FALSE(cxBufferEof(&buf));
704 }
