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28
29#include <QtTest/QtTest>
30
31#include <QBuffer>
32#include <QByteArray>
33
34class tst_QBuffer : public QObject
35{
36 Q_OBJECT
37private slots:
38 void open();
39 void getSetCheck();
40 void readBlock();
41 void readBlockPastEnd();
42 void writeBlock_data();
43 void writeBlock();
44 void seek();
45 void seekTest_data();
46 void seekTest();
47 void read_rawdata();
48 void isSequential();
49 void signalTest_data();
50 void signalTest();
51 void isClosedAfterClose();
52 void readLine_data();
53 void readLine();
54 void canReadLine_data();
55 void canReadLine();
56 void atEnd();
57 void readLineBoundaries();
58 void getAndUngetChar();
59 void writeAfterQByteArrayResize();
60 void read_null();
61
62protected slots:
63 void readyReadSlot();
64 void bytesWrittenSlot(qint64 written);
65
66private:
67 qint64 totalBytesWritten;
68 bool gotReadyRead;
69};
70
71// Testing get/set functions
72void tst_QBuffer::getSetCheck()
73{
74 QBuffer obj1;
75 // const QByteArray & QBuffer::data()
76 // void QBuffer::setData(const QByteArray &)
77 QByteArray var1("Bogus data");
78 obj1.setData(var1);
79 QCOMPARE(var1, obj1.data());
80 obj1.setData(QByteArray());
81 QCOMPARE(QByteArray(), obj1.data());
82}
83
84void tst_QBuffer::open()
85{
86 QByteArray data(10, 'f');
87
88 QBuffer b;
89
90 QTest::ignoreMessage(type: QtWarningMsg, message: "QBuffer::open: Buffer access not specified");
91 QVERIFY(!b.open(QIODevice::NotOpen));
92 QVERIFY(!b.isOpen());
93 b.close();
94
95 QTest::ignoreMessage(type: QtWarningMsg, message: "QBuffer::open: Buffer access not specified");
96 QVERIFY(!b.open(QIODevice::Text));
97 QVERIFY(!b.isOpen());
98 b.close();
99
100 QTest::ignoreMessage(type: QtWarningMsg, message: "QBuffer::open: Buffer access not specified");
101 QVERIFY(!b.open(QIODevice::Unbuffered));
102 QVERIFY(!b.isOpen());
103 b.close();
104
105 QVERIFY(b.open(QIODevice::ReadOnly));
106 QVERIFY(b.isReadable());
107 b.close();
108
109 QVERIFY(b.open(QIODevice::WriteOnly));
110 QVERIFY(b.isWritable());
111 b.close();
112
113 b.setData(data);
114 QVERIFY(b.open(QIODevice::Append));
115 QVERIFY(b.isWritable());
116 QCOMPARE(b.size(), qint64(10));
117 QCOMPARE(b.pos(), b.size());
118 b.close();
119
120 b.setData(data);
121 QVERIFY(b.open(QIODevice::Truncate));
122 QVERIFY(b.isWritable());
123 QCOMPARE(b.size(), qint64(0));
124 QCOMPARE(b.pos(), qint64(0));
125 b.close();
126
127 QVERIFY(b.open(QIODevice::ReadWrite));
128 QVERIFY(b.isReadable());
129 QVERIFY(b.isWritable());
130 b.close();
131}
132
133// some status() tests, too
134void tst_QBuffer::readBlock()
135{
136 const int arraySize = 10;
137 char a[arraySize];
138 QBuffer b;
139 QCOMPARE(b.bytesAvailable(), (qint64) 0); // no data
140 QCOMPARE(b.read(a, arraySize), (qint64) -1); // not opened
141 QVERIFY(b.atEnd());
142
143 QByteArray ba;
144 ba.resize(size: arraySize);
145 b.setBuffer(&ba);
146 QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
147 b.open(openMode: QIODevice::WriteOnly);
148 QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
149 QTest::ignoreMessage(type: QtWarningMsg, message: "QIODevice::read (QBuffer): WriteOnly device");
150 QCOMPARE(b.read(a, arraySize), (qint64) -1); // no read access
151 b.close();
152
153 b.open(openMode: QIODevice::ReadOnly);
154 QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
155 QCOMPARE(b.read(a, arraySize), (qint64) arraySize);
156 QVERIFY(b.atEnd());
157 QCOMPARE(b.bytesAvailable(), (qint64) 0);
158
159 // up to 3.0.x reading beyond the end was an error while ok
160 // this has been made consistent with other QIODevice sub classes in 3.1
161 QCOMPARE(b.read(a, 1), qint64(0));
162 QVERIFY(b.atEnd());
163
164 // read in two chunks
165 b.close();
166 b.open(openMode: QIODevice::ReadOnly);
167 QCOMPARE(b.bytesAvailable(), (qint64) arraySize);
168 QCOMPARE(b.read(a, arraySize/2), (qint64) arraySize/2);
169 QCOMPARE(b.bytesAvailable(), (qint64) arraySize/2);
170 QCOMPARE(b.read(a + arraySize/2, arraySize - arraySize/2),
171 (qint64)(arraySize - arraySize/2));
172 QVERIFY(b.atEnd());
173 QCOMPARE(b.bytesAvailable(), (qint64) 0);
174}
175
176void tst_QBuffer::readBlockPastEnd()
177{
178 QByteArray arr(4096 + 3616, 'd');
179 QBuffer buf(&arr);
180
181 buf.open(openMode: QIODevice::ReadOnly);
182 char dummy[4096];
183
184 buf.read(maxlen: 1);
185
186 QCOMPARE(buf.read(dummy, 4096), qint64(4096));
187 QCOMPARE(buf.read(dummy, 4096), qint64(3615));
188 QVERIFY(buf.atEnd());
189}
190
191void tst_QBuffer::writeBlock_data()
192{
193 QTest::addColumn<QString>(name: "str");
194
195 QTest::newRow( dataTag: "small_bytearray" ) << QString("Test");
196 QTest::newRow( dataTag: "large_bytearray" ) << QString(
197 "The QBuffer class is an I/O device that operates on a QByteArray.\n"
198 "QBuffer is used to read and write to a memory buffer. It is normally "
199 "used with a QTextStream or a QDataStream. QBuffer has an associated "
200 "QByteArray which holds the buffer data. The size() of the buffer is "
201 "automatically adjusted as data is written.\n"
202 "The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
203 "byte array. The byte array can also be set with setBuffer(). Writing to "
204 "the QBuffer will modify the original byte array because QByteArray is "
205 "explicitly shared.\n"
206 "Use open() to open the buffer before use and to set the mode (read-only, "
207 "write-only, etc.). close() closes the buffer. The buffer must be closed "
208 "before reopening or calling setBuffer().\n"
209 "A common way to use QBuffer is through QDataStream or QTextStream, which "
210 "have constructors that take a QBuffer parameter. For convenience, there "
211 "are also QDataStream and QTextStream constructors that take a QByteArray "
212 "parameter. These constructors create and open an internal QBuffer.\n"
213 "Note that QTextStream can also operate on a QString (a Unicode string); a "
214 "QBuffer cannot.\n"
215 "You can also use QBuffer directly through the standard QIODevice functions "
216 "readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
217 "See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
218 "Classes and Input/Output and Networking.\n\n"
219 "The QBuffer class is an I/O device that operates on a QByteArray.\n"
220 "QBuffer is used to read and write to a memory buffer. It is normally "
221 "used with a QTextStream or a QDataStream. QBuffer has an associated "
222 "QByteArray which holds the buffer data. The size() of the buffer is "
223 "automatically adjusted as data is written.\n"
224 "The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
225 "byte array. The byte array can also be set with setBuffer(). Writing to "
226 "the QBuffer will modify the original byte array because QByteArray is "
227 "explicitly shared.\n"
228 "Use open() to open the buffer before use and to set the mode (read-only, "
229 "write-only, etc.). close() closes the buffer. The buffer must be closed "
230 "before reopening or calling setBuffer().\n"
231 "A common way to use QBuffer is through QDataStream or QTextStream, which "
232 "have constructors that take a QBuffer parameter. For convenience, there "
233 "are also QDataStream and QTextStream constructors that take a QByteArray "
234 "parameter. These constructors create and open an internal QBuffer.\n"
235 "Note that QTextStream can also operate on a QString (a Unicode string); a "
236 "QBuffer cannot.\n"
237 "You can also use QBuffer directly through the standard QIODevice functions "
238 "readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
239 "See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
240 "Classes and Input/Output and Networking.\n\n"
241 "The QBuffer class is an I/O device that operates on a QByteArray.\n"
242 "QBuffer is used to read and write to a memory buffer. It is normally "
243 "used with a QTextStream or a QDataStream. QBuffer has an associated "
244 "QByteArray which holds the buffer data. The size() of the buffer is "
245 "automatically adjusted as data is written.\n"
246 "The constructor QBuffer(QByteArray) creates a QBuffer using an existing "
247 "byte array. The byte array can also be set with setBuffer(). Writing to "
248 "the QBuffer will modify the original byte array because QByteArray is "
249 "explicitly shared.\n"
250 "Use open() to open the buffer before use and to set the mode (read-only, "
251 "write-only, etc.). close() closes the buffer. The buffer must be closed "
252 "before reopening or calling setBuffer().\n"
253 "A common way to use QBuffer is through QDataStream or QTextStream, which "
254 "have constructors that take a QBuffer parameter. For convenience, there "
255 "are also QDataStream and QTextStream constructors that take a QByteArray "
256 "parameter. These constructors create and open an internal QBuffer.\n"
257 "Note that QTextStream can also operate on a QString (a Unicode string); a "
258 "QBuffer cannot.\n"
259 "You can also use QBuffer directly through the standard QIODevice functions "
260 "readBlock(), writeBlock() readLine(), at(), getch(), putch() and ungetch().\n"
261 "See also QFile, QDataStream, QTextStream, QByteArray, Shared Classes, Collection "
262 "Classes and Input/Output and Networking.");
263}
264
265void tst_QBuffer::writeBlock()
266{
267 QFETCH( QString, str );
268
269 QByteArray ba;
270 QBuffer buf( &ba );
271 buf.open(openMode: QIODevice::ReadWrite);
272 QByteArray data = str.toLatin1();
273 QCOMPARE(buf.write( data.constData(), data.size() ), qint64(data.size()));
274
275 QCOMPARE(buf.data(), str.toLatin1());
276}
277
278void tst_QBuffer::seek()
279{
280 QBuffer buffer;
281 buffer.open(openMode: QIODevice::WriteOnly);
282 QCOMPARE(buffer.size(), qint64(0));
283 QCOMPARE(buffer.pos(), qint64(0));
284 const qint64 pos = 10;
285 QVERIFY(buffer.seek(pos));
286 QCOMPARE(buffer.size(), pos);
287}
288
289void tst_QBuffer::seekTest_data()
290{
291 writeBlock_data();
292}
293
294#define DO_VALID_SEEK(position) { \
295 char c; \
296 QVERIFY(buf.seek(qint64(position))); \
297 QCOMPARE(buf.pos(), qint64(position)); \
298 QVERIFY(buf.getChar(&c)); \
299 QCOMPARE(QChar(c), str.at(qint64(position))); \
300}
301#define DO_INVALID_SEEK(position) { \
302 qint64 prev_pos = buf.pos(); \
303 QVERIFY(!buf.seek(qint64(position))); \
304 QCOMPARE(buf.pos(), prev_pos); /* position should not be changed */ \
305}
306
307void tst_QBuffer::seekTest()
308{
309 QFETCH(QString, str);
310
311 QByteArray ba;
312 QBuffer buf(&ba);
313 QCOMPARE(buf.pos(), qint64(0));
314
315 buf.open(openMode: QIODevice::ReadWrite);
316 QCOMPARE(buf.pos(), qint64(0));
317 QCOMPARE(buf.bytesAvailable(), qint64(0));
318
319 QByteArray data = str.toLatin1();
320 QCOMPARE(buf.write( data.constData(), data.size() ), qint64(data.size()));
321 QCOMPARE(buf.bytesAvailable(), qint64(0)); // we're at the end
322 QCOMPARE(buf.size(), qint64(data.size()));
323
324 QTest::ignoreMessage(type: QtWarningMsg, message: "QBuffer::seek: Invalid pos: -1");
325 DO_INVALID_SEEK(-1);
326
327 DO_VALID_SEEK(0);
328 DO_VALID_SEEK(str.size() - 1);
329 QVERIFY(buf.atEnd());
330 DO_VALID_SEEK(str.size() / 2);
331
332 // Special case: valid to seek one position past the buffer.
333 // Its then legal to write, but not read.
334 {
335 char c = 'a';
336 QVERIFY(buf.seek(qint64(str.size())));
337 QCOMPARE(buf.bytesAvailable(), qint64(0));
338 QCOMPARE(buf.read(&c, qint64(1)), qint64(0));
339 QCOMPARE(c, 'a');
340 QCOMPARE(buf.write(&c, qint64(1)), qint64(1));
341 }
342
343 // Special case 2: seeking to an arbitrary position beyond the buffer auto-expands it
344 {
345 char c;
346 const int offset = 1; // any positive integer will do
347 const qint64 pos = buf.size() + offset;
348 QVERIFY(buf.seek(pos));
349 QCOMPARE(buf.bytesAvailable(), qint64(0));
350 QCOMPARE(buf.pos(), pos);
351 QVERIFY(!buf.getChar(&c));
352 QVERIFY(buf.seek(pos - 1));
353 QVERIFY(buf.getChar(&c));
354 QCOMPARE(c, buf.data().at(pos - 1));
355 QVERIFY(buf.seek(pos));
356 QVERIFY(buf.putChar(c));
357 }
358}
359
360void tst_QBuffer::read_rawdata()
361{
362 static const unsigned char mydata[] = {
363 0x01, 0x00, 0x03, 0x84, 0x78, 0x9c, 0x3b, 0x76,
364 0xec, 0x18, 0xc3, 0x31, 0x0a, 0xf1, 0xcc, 0x99,
365 0x6d, 0x5b
366 };
367
368 QByteArray data = QByteArray::fromRawData((const char *)mydata, size: sizeof(mydata));
369 QBuffer buffer(&data);
370 buffer.open(openMode: QIODevice::ReadOnly);
371 QDataStream in(&buffer);
372 quint8 ch;
373 for (int i = 0; i < (int)sizeof(mydata); ++i) {
374 QVERIFY(!buffer.atEnd());
375 in >> ch;
376 QCOMPARE(ch, (quint8)mydata[i]);
377 }
378 QVERIFY(buffer.atEnd());
379}
380
381void tst_QBuffer::isSequential()
382{
383 QBuffer buf;
384 QVERIFY(!buf.isSequential());
385}
386
387void tst_QBuffer::signalTest_data()
388{
389 QTest::addColumn<QByteArray>(name: "sample");
390
391 QTest::newRow(dataTag: "empty") << QByteArray();
392 QTest::newRow(dataTag: "size 1") << QByteArray("1");
393 QTest::newRow(dataTag: "size 2") << QByteArray("11");
394 QTest::newRow(dataTag: "size 100") << QByteArray(100, '1');
395}
396
397void tst_QBuffer::signalTest()
398{
399 QFETCH(QByteArray, sample);
400
401 totalBytesWritten = 0;
402
403 QBuffer buf;
404 buf.open(openMode: QIODevice::WriteOnly);
405
406 buf.buffer().resize(size: sample.size() * 10);
407 connect(sender: &buf, SIGNAL(readyRead()), receiver: this, SLOT(readyReadSlot()));
408 connect(sender: &buf, SIGNAL(bytesWritten(qint64)), receiver: this, SLOT(bytesWrittenSlot(qint64)));
409
410 for (int i = 0; i < 10; ++i) {
411 gotReadyRead = false;
412 QCOMPARE(buf.write(sample), qint64(sample.size()));
413 if (sample.size() > 0) {
414 QTestEventLoop::instance().enterLoop(secs: 5);
415 if (QTestEventLoop::instance().timeout())
416 QFAIL("Timed out when waiting for readyRead()");
417 QCOMPARE(totalBytesWritten, qint64(sample.size() * (i + 1)));
418 QVERIFY(gotReadyRead);
419 } else {
420 QCOMPARE(totalBytesWritten, qint64(0));
421 QVERIFY(!gotReadyRead);
422 }
423 }
424}
425
426void tst_QBuffer::readyReadSlot()
427{
428 gotReadyRead = true;
429 QTestEventLoop::instance().exitLoop();
430}
431
432void tst_QBuffer::bytesWrittenSlot(qint64 written)
433{
434 totalBytesWritten += written;
435}
436
437void tst_QBuffer::isClosedAfterClose()
438{
439 QBuffer buffer;
440 buffer.open(openMode: QBuffer::ReadOnly);
441 QVERIFY(buffer.isOpen());
442 buffer.close();
443 QVERIFY(!buffer.isOpen());
444}
445
446void tst_QBuffer::readLine_data()
447{
448 QTest::addColumn<QByteArray>(name: "src");
449 QTest::addColumn<int>(name: "maxlen");
450 QTest::addColumn<QByteArray>(name: "expected");
451
452 QTest::newRow(dataTag: "1") << QByteArray("line1\nline2\n") << 1024
453 << QByteArray("line1\n");
454 QTest::newRow(dataTag: "2") << QByteArray("hi there") << 1024
455 << QByteArray("hi there");
456 QTest::newRow(dataTag: "3") << QByteArray("l\n") << 3 << QByteArray("l\n");
457 QTest::newRow(dataTag: "4") << QByteArray("l\n") << 2 << QByteArray("l");
458}
459
460void tst_QBuffer::readLine()
461{
462 QFETCH(QByteArray, src);
463 QFETCH(int, maxlen);
464 QFETCH(QByteArray, expected);
465
466 QBuffer buf;
467 buf.setBuffer(&src);
468 char *result = new char[maxlen + 1];
469 result[maxlen] = '\0';
470
471 QVERIFY(buf.open(QIODevice::ReadOnly));
472
473 qint64 bytes_read = buf.readLine(data: result, maxlen);
474
475 QCOMPARE(bytes_read, qint64(expected.size()));
476 QCOMPARE(QByteArray(result), expected);
477
478 buf.close();
479 delete[] result;
480
481}
482
483void tst_QBuffer::canReadLine_data()
484{
485 QTest::addColumn<QByteArray>(name: "src");
486 QTest::addColumn<bool>(name: "expected");
487
488 QTest::newRow(dataTag: "1") << QByteArray("no newline") << false;
489 QTest::newRow(dataTag: "2") << QByteArray("two \n lines\n") << true;
490 QTest::newRow(dataTag: "3") << QByteArray("\n") << true;
491 QTest::newRow(dataTag: "4") << QByteArray() << false;
492}
493
494void tst_QBuffer::canReadLine()
495{
496 QFETCH(QByteArray, src);
497 QFETCH(bool, expected);
498
499 QBuffer buf;
500 buf.setBuffer(&src);
501 QVERIFY(!buf.canReadLine());
502 QVERIFY(buf.open(QIODevice::ReadOnly));
503 QCOMPARE(buf.canReadLine(), expected);
504}
505
506void tst_QBuffer::atEnd()
507{
508 QBuffer buffer;
509 buffer.open(openMode: QBuffer::Append);
510 buffer.write(data: "heisann");
511 buffer.close();
512
513 buffer.open(openMode: QBuffer::ReadOnly);
514 buffer.seek(off: buffer.size());
515 char c;
516 QVERIFY(!buffer.getChar(&c));
517 QCOMPARE(buffer.read(&c, 1), qint64(0));
518}
519
520// Test that reading data out of a QBuffer a line at a time gives the same
521// result as reading the whole buffer at once.
522void tst_QBuffer::readLineBoundaries()
523{
524 QByteArray line = "This is a line\n";
525 QBuffer buffer;
526 buffer.open(openMode: QIODevice::ReadWrite);
527 while (buffer.size() < 16384)
528 buffer.write(data: line);
529
530 buffer.seek(off: 0);
531 QByteArray lineByLine;
532 while (!buffer.atEnd())
533 lineByLine.append(a: buffer.readLine());
534
535 buffer.seek(off: 0);
536 QCOMPARE(buffer.bytesAvailable(), lineByLine.size());
537
538 QByteArray all = buffer.readAll();
539 QCOMPARE(all.size(), lineByLine.size());
540 QCOMPARE(all, lineByLine);
541}
542
543// Test that any character in a buffer can be read and pushed back.
544void tst_QBuffer::getAndUngetChar()
545{
546 // Create some data in a buffer
547 QByteArray line = "This is a line\n";
548 QBuffer buffer;
549 buffer.open(openMode: QIODevice::ReadWrite);
550 while (buffer.size() < 16384)
551 buffer.write(data: line);
552
553 // Take a copy of the data held in the buffer
554 buffer.seek(off: 0);
555 QCOMPARE(buffer.bytesAvailable(), buffer.size());
556 QByteArray data = buffer.readAll();
557 QCOMPARE(buffer.bytesAvailable(), qint64(0));
558
559 // Get and unget each character in order
560 for (qint64 i = 0; i < buffer.size(); ++i) {
561 buffer.seek(off: i);
562 char c;
563 QVERIFY(buffer.getChar(&c));
564 QCOMPARE(c, data.at((uint)i));
565 buffer.ungetChar(c);
566 }
567
568 // Get and unget each character in reverse order
569 for (qint64 i = buffer.size() - 1; i >= 0; --i) {
570 buffer.seek(off: i);
571 char c;
572 QVERIFY(buffer.getChar(&c));
573 QCOMPARE(c, data.at((uint)i));
574 buffer.ungetChar(c);
575 }
576
577 // Verify that the state of the buffer still matches the original data.
578 buffer.seek(off: 0);
579 QCOMPARE(buffer.bytesAvailable(), data.size());
580 QCOMPARE(buffer.readAll(), data);
581 QCOMPARE(buffer.bytesAvailable(), qint64(0));
582}
583
584void tst_QBuffer::writeAfterQByteArrayResize()
585{
586 QBuffer buffer;
587 QVERIFY(buffer.open(QIODevice::WriteOnly));
588
589 buffer.write(data: QByteArray().fill(c: 'a', size: 1000));
590 QCOMPARE(buffer.buffer().size(), 1000);
591
592 // resize the QByteArray behind QBuffer's back
593 buffer.buffer().clear();
594 buffer.seek(off: 0);
595 QCOMPARE(buffer.buffer().size(), 0);
596
597 buffer.write(data: QByteArray().fill(c: 'b', size: 1000));
598 QCOMPARE(buffer.buffer().size(), 1000);
599}
600
601void tst_QBuffer::read_null()
602{
603 QByteArray buffer;
604 buffer.resize(size: 32000);
605 for (int i = 0; i < buffer.size(); ++i)
606 buffer[i] = char(i & 0xff);
607
608 QBuffer in(&buffer);
609 in.open(openMode: QIODevice::ReadOnly);
610
611 QByteArray chunk;
612
613 chunk.resize(size: 16380);
614 in.read(data: chunk.data(), maxlen: 16380);
615
616 QCOMPARE(chunk, buffer.mid(0, chunk.size()));
617
618 in.read(data: chunk.data(), maxlen: 0);
619
620 chunk.resize(size: 8);
621 in.read(data: chunk.data(), maxlen: chunk.size());
622
623 QCOMPARE(chunk, buffer.mid(16380, chunk.size()));
624}
625
626QTEST_MAIN(tst_QBuffer)
627#include "tst_qbuffer.moc"
628

source code of qtbase/tests/auto/corelib/io/qbuffer/tst_qbuffer.cpp