testfileset.py@ 84894

Last change on this file since 84894 was 84894, checked in by vboxsync, 4 years ago
Validation Kit/testfileset: Limit iterations of chooseRandomDirFromTree() to avoid potential endless loops [build fix].
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1	# -- coding: utf-8 --
2	# $Id: testfileset.py 84894 2020-06-22 11:11:34Z vboxsync $
3	# pylint: disable=too-many-lines
4
5	"""
6	Test File Set
7	"""
8
9	__copyright__ = \
10	"""
11	Copyright (C) 2010-2020 Oracle Corporation
12
13	This file is part of VirtualBox Open Source Edition (OSE), as
14	available from http://www.virtualbox.org. This file is free software;
15	you can redistribute it and/or modify it under the terms of the GNU
16	General Public License (GPL) as published by the Free Software
17	Foundation, in version 2 as it comes in the "COPYING" file of the
18	VirtualBox OSE distribution. VirtualBox OSE is distributed in the
19	hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
20
21	The contents of this file may alternatively be used under the terms
22	of the Common Development and Distribution License Version 1.0
23	(CDDL) only, as it comes in the "COPYING.CDDL" file of the
24	VirtualBox OSE distribution, in which case the provisions of the
25	CDDL are applicable instead of those of the GPL.
26
27	You may elect to license modified versions of this file under the
28	terms and conditions of either the GPL or the CDDL or both.
29	"""
30	__version__ = "$Revision: 84894 $"
31
32
33	# Standard Python imports.
34	import os;
35	import random;
36	import string;
37	import sys;
38	import tarfile;
39	import unittest;
40
41	# Validation Kit imports.
42	from common import utils;
43	from common import pathutils;
44	from testdriver import reporter;
45
46	# Python 3 hacks:
47	if sys.version_info[0] >= 3:
48	xrange = range; # pylint: disable=redefined-builtin,invalid-name
49
50
51
52	class TestFsObj(object):
53	""" A file system object we created in for test purposes. """
54	def __init__(self, oParent, sPath, sName = None):
55	self.oParent = oParent # type: TestDir
56	self.sPath = sPath # type: str
57	self.sName = sName # type: str
58	if oParent:
59	assert sPath.startswith(oParent.sPath);
60	assert sName is None;
61	self.sName = sPath[len(oParent.sPath) + 1:];
62	# Add to parent.
63	oParent.aoChildren.append(self);
64	oParent.dChildrenUpper[self.sName.upper()] = self;
65
66	def buildPath(self, sRoot, sSep):
67	"""
68	Build the path from sRoot using sSep.
69
70	This is handy for getting the path to an object in a different context
71	(OS, path) than what it was generated for.
72	"""
73	if self.oParent:
74	return self.oParent.buildPath(sRoot, sSep) + sSep + self.sName;
75	return sRoot + sSep + self.sName;
76
77
78	class TestFile(TestFsObj):
79	""" A file object in the guest. """
80	def __init__(self, oParent, sPath, abContent):
81	TestFsObj.__init__(self, oParent, sPath);
82	self.abContent = abContent # type: bytearray
83	self.cbContent = len(abContent);
84	self.off = 0;
85
86	def read(self, cbToRead):
87	""" read() emulation. """
88	assert self.off <= self.cbContent;
89	cbLeft = self.cbContent - self.off;
90	if cbLeft < cbToRead:
91	cbToRead = cbLeft;
92	abRet = self.abContent[self.off:(self.off + cbToRead)];
93	assert len(abRet) == cbToRead;
94	self.off += cbToRead;
95	if sys.version_info[0] < 3:
96	return bytes(abRet);
97	return abRet;
98
99	def equalFile(self, oFile):
100	""" Compares the content of oFile with self.abContent. """
101
102	# Check the size first.
103	try:
104	cbFile = os.fstat(oFile.fileno()).st_size;
105	except:
106	return reporter.errorXcpt();
107	if cbFile != self.cbContent:
108	return reporter.error('file size differs: %s, cbContent=%s' % (cbFile, self.cbContent));
109
110	# Compare the bytes next.
111	offFile = 0;
112	try:
113	oFile.seek(offFile);
114	except:
115	return reporter.error('seek error');
116	while offFile < self.cbContent:
117	cbToRead = self.cbContent - offFile;
118	if cbToRead > 256*1024:
119	cbToRead = 256*1024;
120	try:
121	abRead = oFile.read(cbToRead);
122	except:
123	return reporter.error('read error at offset %s' % (offFile,));
124	cbRead = len(abRead);
125	if cbRead == 0:
126	return reporter.error('premature end of file at offset %s' % (offFile,));
127	if not utils.areBytesEqual(abRead, self.abContent[offFile:(offFile + cbRead)]):
128	return reporter.error('%s byte block at offset %s differs' % (cbRead, offFile,));
129	# Advance:
130	offFile += cbRead;
131
132	return True;
133
134	@staticmethod
135	def hexFormatBytes(abBuf):
136	""" Formats a buffer/string/whatever as a string of hex bytes """
137	if sys.version_info[0] >= 3:
138	if utils.isString(abBuf):
139	try: abBuf = bytes(abBuf, 'utf-8');
140	except: pass;
141	else:
142	if utils.isString(abBuf):
143	try: abBuf = bytearray(abBuf, 'utf-8'); # pylint: disable=redefined-variable-type
144	except: pass;
145	sRet = '';
146	off = 0;
147	for off, bByte in enumerate(abBuf):
148	if off > 0:
149	sRet += ' ' if off & 7 else '-';
150	if isinstance(bByte, int):
151	sRet += '%02x' % (bByte,);
152	else:
153	sRet += '%02x' % (ord(bByte),);
154	return sRet;
155
156	def checkRange(self, cbRange, offFile = 0):
157	""" Check if the specified range is entirely within the file or not. """
158	if offFile >= self.cbContent:
159	return reporter.error('buffer @ %s LB %s is beyond the end of the file (%s bytes)!'
160	% (offFile, cbRange, self.cbContent,));
161	if offFile + cbRange > self.cbContent:
162	return reporter.error('buffer @ %s LB %s is partially beyond the end of the file (%s bytes)!'
163	% (offFile, cbRange, self.cbContent,));
164	return True;
165
166	def equalMemory(self, abBuf, offFile = 0):
167	"""
168	Compares the content of the given buffer with the file content at that
169	file offset.
170
171	Returns True if it matches, False + error logging if it does not match.
172	"""
173	if not abBuf:
174	return True;
175
176	if not self.checkRange(len(abBuf), offFile):
177	return False;
178
179	if sys.version_info[0] >= 3:
180	if utils.areBytesEqual(abBuf, self.abContent[offFile:(offFile + len(abBuf))]):
181	return True;
182	else:
183	if utils.areBytesEqual(abBuf, buffer(self.abContent, offFile, len(abBuf))): # pylint: disable=undefined-variable
184	return True;
185
186	reporter.error('mismatch with buffer @ %s LB %s (cbContent=%s)!' % (offFile, len(abBuf), self.cbContent,));
187	reporter.error(' type(abBuf): %s' % (type(abBuf),));
188	#if isinstance(abBuf, memoryview):
189	# reporter.error(' nbytes=%s len=%s itemsize=%s type(obj)=%s'
190	# % (abBuf.nbytes, len(abBuf), abBuf.itemsize, type(abBuf.obj),));
191	reporter.error('type(abContent): %s' % (type(self.abContent),));
192
193	offBuf = 0;
194	cbLeft = len(abBuf);
195	while cbLeft > 0:
196	cbLine = min(16, cbLeft);
197	abBuf1 = abBuf[offBuf:(offBuf + cbLine)];
198	abBuf2 = self.abContent[offFile:(offFile + cbLine)];
199	if not utils.areBytesEqual(abBuf1, abBuf2):
200	try: sStr1 = self.hexFormatBytes(abBuf1);
201	except: sStr1 = 'oops';
202	try: sStr2 = self.hexFormatBytes(abBuf2);
203	except: sStr2 = 'oops';
204	reporter.log('%#10x: %s' % (offBuf, sStr1,));
205	reporter.log('%#10x: %s' % (offFile, sStr2,));
206
207	# Advance.
208	offBuf += 16;
209	offFile += 16;
210	cbLeft -= 16;
211
212	return False;
213
214
215	class TestFileZeroFilled(TestFile):
216	"""
217	Zero filled test file.
218	"""
219
220	def __init__(self, oParent, sPath, cbContent):
221	TestFile.__init__(self, oParent, sPath, bytearray(1));
222	self.cbContent = cbContent;
223
224	def read(self, cbToRead):
225	""" read() emulation. """
226	assert self.off <= self.cbContent;
227	cbLeft = self.cbContent - self.off;
228	if cbLeft < cbToRead:
229	cbToRead = cbLeft;
230	abRet = bytearray(cbToRead);
231	assert len(abRet) == cbToRead;
232	self.off += cbToRead;
233	if sys.version_info[0] < 3:
234	return bytes(abRet);
235	return abRet;
236
237	def equalFile(self, oFile):
238	_ = oFile;
239	assert False, "not implemented";
240	return False;
241
242	def equalMemory(self, abBuf, offFile = 0):
243	if not abBuf:
244	return True;
245
246	if not self.checkRange(len(abBuf), offFile):
247	return False;
248
249	if utils.areBytesEqual(abBuf, bytearray(len(abBuf))):
250	return True;
251
252	cErrors = 0;
253	offBuf = 0
254	while offBuf < len(abBuf):
255	bByte = abBuf[offBuf];
256	if not isinstance(bByte, int):
257	bByte = ord(bByte);
258	if bByte != 0:
259	reporter.error('Mismatch @ %s/%s: %#x, expected 0!' % (offFile, offBuf, bByte,));
260	cErrors += 1;
261	if cErrors > 32:
262	return False;
263	offBuf += 1;
264	return cErrors == 0;
265
266
267	class TestDir(TestFsObj):
268	""" A file object in the guest. """
269	def __init__(self, oParent, sPath, sName = None):
270	TestFsObj.__init__(self, oParent, sPath, sName);
271	self.aoChildren = [] # type: list(TestFsObj)
272	self.dChildrenUpper = {} # type: dict(str, TestFsObj)
273
274	def contains(self, sName):
275	""" Checks if the directory contains the given name. """
276	return sName.upper() in self.dChildrenUpper
277
278
279	class TestFileSet(object):
280	"""
281	A generated set of files and directories for use in a test.
282
283	Can be wrapped up into a tarball or written directly to the file system.
284	"""
285
286	ksReservedWinOS2 = '/\\"*:<>?\|\t\v\n\r\f\a\b';
287	ksReservedUnix = '/';
288	ksReservedTrailingWinOS2 = ' .';
289	ksReservedTrailingUnix = '';
290
291	## @name Path style.
292	## @{
293
294	## @}
295
296	def __init__(self, fDosStyle, sBasePath, sSubDir, # pylint: disable=too-many-arguments
297	asCompatibleWith = None, # List of getHostOs values to the names must be compatible with.
298	oRngFileSizes = xrange(0, 16384),
299	oRngManyFiles = xrange(128, 512),
300	oRngTreeFiles = xrange(128, 384),
301	oRngTreeDepth = xrange(92, 256),
302	oRngTreeDirs = xrange(2, 16),
303	cchMaxPath = 230,
304	cchMaxName = 230,
305	uSeed = None):
306	## @name Parameters
307	## @{
308	self.fDosStyle = fDosStyle;
309	self.sMinStyle = 'win' if fDosStyle else 'linux';
310	if asCompatibleWith is not None:
311	for sOs in asCompatibleWith:
312	assert sOs in ('win', 'os2', 'darwin', 'linux', 'solaris',), sOs;
313	if 'os2' in asCompatibleWith:
314	self.sMinStyle = 'os2';
315	elif 'win' in asCompatibleWith:
316	self.sMinStyle = 'win';
317	self.sBasePath = sBasePath;
318	self.sSubDir = sSubDir;
319	self.oRngFileSizes = oRngFileSizes;
320	self.oRngManyFiles = oRngManyFiles;
321	self.oRngTreeFiles = oRngTreeFiles;
322	self.oRngTreeDepth = oRngTreeDepth;
323	self.oRngTreeDirs = oRngTreeDirs;
324	self.cchMaxPath = cchMaxPath;
325	self.cchMaxName = cchMaxName
326	## @}
327
328	## @name Charset stuff
329	## @todo allow more chars for unix hosts + guests.
330	## @todo include unicode stuff, except on OS/2 and DOS.
331	## @{
332	## The filename charset.
333	self.sFileCharset = string.printable;
334	## Set of characters that should not trail a guest filename.
335	self.sReservedTrailing = self.ksReservedTrailingWinOS2;
336	if self.sMinStyle in ('win', 'os2'):
337	for ch in self.ksReservedWinOS2:
338	self.sFileCharset = self.sFileCharset.replace(ch, '');
339	else:
340	self.sReservedTrailing = self.ksReservedTrailingUnix;
341	for ch in self.ksReservedUnix:
342	self.sFileCharset = self.sFileCharset.replace(ch, '');
343	# More spaces and dot:
344	self.sFileCharset += ' ...';
345	## @}
346
347	## The root directory.
348	self.oRoot = None # type: TestDir;
349	## An empty directory (under root).
350	self.oEmptyDir = None # type: TestDir;
351
352	## A directory with a lot of files in it.
353	self.oManyDir = None # type: TestDir;
354
355	## A directory with a mixed tree structure under it.
356	self.oTreeDir = None # type: TestDir;
357	## Number of files in oTreeDir.
358	self.cTreeFiles = 0;
359	## Number of directories under oTreeDir.
360	self.cTreeDirs = 0;
361	## Number of other file types under oTreeDir.
362	self.cTreeOthers = 0;
363
364	## All directories in creation order.
365	self.aoDirs = [] # type: list(TestDir);
366	## All files in creation order.
367	self.aoFiles = [] # type: list(TestFile);
368	## Path to object lookup.
369	self.dPaths = {} # type: dict(str, TestFsObj);
370
371	#
372	# Do the creating.
373	#
374	self.uSeed = uSeed if uSeed is not None else utils.timestampMilli();
375	self.oRandom = random.Random();
376	self.oRandom.seed(self.uSeed);
377	reporter.log('prepareGuestForTesting: random seed %s' % (self.uSeed,));
378
379	self.__createTestStuff();
380
381	def __createFilename(self, oParent, sCharset, sReservedTrailing):
382	"""
383	Creates a filename contains random characters from sCharset and together
384	with oParent.sPath doesn't exceed the given max chars in length.
385	"""
386	## @todo Consider extending this to take UTF-8 and UTF-16 encoding so we
387	## can safely use the full unicode range. Need to check how
388	## RTZipTarCmd handles file name encoding in general...
389
390	if oParent:
391	cchMaxName = self.cchMaxPath - len(oParent.sPath) - 1;
392	else:
393	cchMaxName = self.cchMaxPath - 4;
394	if cchMaxName > self.cchMaxName:
395	cchMaxName = self.cchMaxName;
396	if cchMaxName <= 1:
397	cchMaxName = 2;
398
399	while True:
400	cchName = self.oRandom.randrange(1, cchMaxName);
401	sName = ''.join(self.oRandom.choice(sCharset) for _ in xrange(cchName));
402	if oParent is None or not oParent.contains(sName):
403	if sName[-1] not in sReservedTrailing:
404	if sName not in ('.', '..',):
405	return sName;
406	return ''; # never reached, but makes pylint happy.
407
408	def generateFilenameEx(self, cchMax = -1, cchMin = -1):
409	"""
410	Generates a filename according to the given specs.
411
412	This is for external use, whereas __createFilename is for internal.
413
414	Returns generated filename.
415	"""
416	assert cchMax == -1 or (cchMax >= 1 and cchMax > cchMin);
417	if cchMin <= 0:
418	cchMin = 1;
419	if cchMax < cchMin:
420	cchMax = self.cchMaxName;
421
422	while True:
423	cchName = self.oRandom.randrange(cchMin, cchMax + 1);
424	sName = ''.join(self.oRandom.choice(self.sFileCharset) for _ in xrange(cchName));
425	if sName[-1] not in self.sReservedTrailing:
426	if sName not in ('.', '..',):
427	return sName;
428	return ''; # never reached, but makes pylint happy.
429
430	def __createTestDir(self, oParent, sDir, sName = None):
431	"""
432	Creates a test directory.
433	"""
434	oDir = TestDir(oParent, sDir, sName);
435	self.aoDirs.append(oDir);
436	self.dPaths[sDir] = oDir;
437	return oDir;
438
439	def __createTestFile(self, oParent, sFile):
440	"""
441	Creates a test file with random size up to cbMaxContent and random content.
442	"""
443	cbFile = self.oRandom.choice(self.oRngFileSizes);
444	abContent = bytearray(self.oRandom.getrandbits(8) for _ in xrange(cbFile));
445
446	oFile = TestFile(oParent, sFile, abContent);
447	self.aoFiles.append(oFile);
448	self.dPaths[sFile] = oFile;
449	return oFile;
450
451	def __createTestStuff(self):
452	"""
453	Create a random file set that we can work on in the tests.
454	Returns True/False.
455	"""
456
457	#
458	# Create the root test dir.
459	#
460	sRoot = pathutils.joinEx(self.fDosStyle, self.sBasePath, self.sSubDir);
461	self.oRoot = self.__createTestDir(None, sRoot, self.sSubDir);
462	self.oEmptyDir = self.__createTestDir(self.oRoot, pathutils.joinEx(self.fDosStyle, sRoot, 'empty'));
463
464	#
465	# Create a directory with lots of files in it:
466	#
467	oDir = self.__createTestDir(self.oRoot, pathutils.joinEx(self.fDosStyle, sRoot, 'many'));
468	self.oManyDir = oDir;
469	cManyFiles = self.oRandom.choice(self.oRngManyFiles);
470	for _ in xrange(cManyFiles):
471	sName = self.__createFilename(oDir, self.sFileCharset, self.sReservedTrailing);
472	self.__createTestFile(oDir, pathutils.joinEx(self.fDosStyle, oDir.sPath, sName));
473
474	#
475	# Generate a tree of files and dirs.
476	#
477	oDir = self.__createTestDir(self.oRoot, pathutils.joinEx(self.fDosStyle, sRoot, 'tree'));
478	uMaxDepth = self.oRandom.choice(self.oRngTreeDepth);
479	cMaxFiles = self.oRandom.choice(self.oRngTreeFiles);
480	cMaxDirs = self.oRandom.choice(self.oRngTreeDirs);
481	self.oTreeDir = oDir;
482	self.cTreeFiles = 0;
483	self.cTreeDirs = 0;
484	uDepth = 0;
485	while self.cTreeFiles < cMaxFiles and self.cTreeDirs < cMaxDirs:
486	iAction = self.oRandom.randrange(0, 2+1);
487	# 0: Add a file:
488	if iAction == 0 and self.cTreeFiles < cMaxFiles and len(oDir.sPath) < 230 - 2:
489	sName = self.__createFilename(oDir, self.sFileCharset, self.sReservedTrailing);
490	self.__createTestFile(oDir, pathutils.joinEx(self.fDosStyle, oDir.sPath, sName));
491	self.cTreeFiles += 1;
492	# 1: Add a subdirector and descend into it:
493	elif iAction == 1 and self.cTreeDirs < cMaxDirs and uDepth < uMaxDepth and len(oDir.sPath) < 220:
494	sName = self.__createFilename(oDir, self.sFileCharset, self.sReservedTrailing);
495	oDir = self.__createTestDir(oDir, pathutils.joinEx(self.fDosStyle, oDir.sPath, sName));
496	self.cTreeDirs += 1;
497	uDepth += 1;
498	# 2: Ascend to parent dir:
499	elif iAction == 2 and uDepth > 0:
500	oDir = oDir.oParent;
501	uDepth -= 1;
502
503	return True;
504
505	def createTarball(self, sTarFileHst):
506	"""
507	Creates a tarball on the host.
508	Returns success indicator.
509	"""
510	reporter.log('Creating tarball "%s" with test files for the guest...' % (sTarFileHst,));
511
512	cchSkip = len(self.sBasePath) + 1;
513
514	# Open the tarball:
515	try:
516	# Make sure to explicitly set GNU_FORMAT here, as with Python 3.8 the default format (tarfile.DEFAULT_FORMAT)
517	# has been changed to tarfile.PAX_FORMAT, which our extraction code (vts_tar) currently can't handle.
518	## @todo Remove tarfile.GNU_FORMAT and use tarfile.PAX_FORMAT as soon as we have PAX support.
519	oTarFile = tarfile.open(sTarFileHst, 'w:gz', format = tarfile.GNU_FORMAT);
520	except:
521	return reporter.errorXcpt('Failed to open new tar file: %s' % (sTarFileHst,));
522
523	# Directories:
524	for oDir in self.aoDirs:
525	sPath = oDir.sPath[cchSkip:];
526	if self.fDosStyle:
527	sPath = sPath.replace('\\', '/');
528	oTarInfo = tarfile.TarInfo(sPath + '/');
529	oTarInfo.mode = 0o777;
530	oTarInfo.type = tarfile.DIRTYPE;
531	try:
532	oTarFile.addfile(oTarInfo);
533	except:
534	return reporter.errorXcpt('Failed adding directory tarfile: %s' % (oDir.sPath,));
535
536	# Files:
537	for oFile in self.aoFiles:
538	sPath = oFile.sPath[cchSkip:];
539	if self.fDosStyle:
540	sPath = sPath.replace('\\', '/');
541	oTarInfo = tarfile.TarInfo(sPath);
542	oTarInfo.mode = 0o666;
543	oTarInfo.size = len(oFile.abContent);
544	oFile.off = 0;
545	try:
546	oTarFile.addfile(oTarInfo, oFile);
547	except:
548	return reporter.errorXcpt('Failed adding directory tarfile: %s' % (oFile.sPath,));
549
550	# Complete the tarball.
551	try:
552	oTarFile.close();
553	except:
554	return reporter.errorXcpt('Error closing new tar file: %s' % (sTarFileHst,));
555	return True;
556
557	def writeToDisk(self, sAltBase = None):
558	"""
559	Writes out the files to disk.
560	Returns True on success, False + error logging on failure.
561	"""
562
563	# We only need to flip DOS slashes to unix ones, since windows & OS/2 can handle unix slashes.
564	fDosToUnix = self.fDosStyle and os.path.sep != '\\';
565
566	# The directories:
567	for oDir in self.aoDirs:
568	sPath = oDir.sPath;
569	if sAltBase:
570	if fDosToUnix:
571	sPath = sAltBase + sPath[len(self.sBasePath):].replace('\\', os.path.sep);
572	else:
573	sPath = sAltBase + sPath[len(self.sBasePath):];
574	elif fDosToUnix:
575	sPath = sPath.replace('\\', os.path.sep);
576
577	try:
578	os.mkdir(sPath, 0o770);
579	except:
580	return reporter.errorXcpt('mkdir(%s) failed' % (sPath,));
581
582	# The files:
583	for oFile in self.aoFiles:
584	sPath = oFile.sPath;
585	if sAltBase:
586	if fDosToUnix:
587	sPath = sAltBase + sPath[len(self.sBasePath):].replace('\\', os.path.sep);
588	else:
589	sPath = sAltBase + sPath[len(self.sBasePath):];
590	elif fDosToUnix:
591	sPath = sPath.replace('\\', os.path.sep);
592
593	try:
594	oOutFile = open(sPath, 'wb');
595	except:
596	return reporter.errorXcpt('open(%s, "wb") failed' % (sPath,));
597	try:
598	if sys.version_info[0] < 3:
599	oOutFile.write(bytes(oFile.abContent));
600	else:
601	oOutFile.write(oFile.abContent);
602	except:
603	try: oOutFile.close();
604	except: pass;
605	return reporter.errorXcpt('%s: write(%s bytes) failed' % (sPath, oFile.cbContent,));
606	try:
607	oOutFile.close();
608	except:
609	return reporter.errorXcpt('%s: close() failed' % (sPath,));
610
611	return True;
612
613
614	def chooseRandomFile(self):
615	"""
616	Returns a random file.
617	"""
618	return self.aoFiles[self.oRandom.choice(xrange(len(self.aoFiles)))];
619
620	def chooseRandomDirFromTree(self, fLeaf = False, fNonEmpty = False, cMaxRetries = 1024):
621	"""
622	Returns a random directory from the tree (self.oTreeDir).
623	"""
624	cRetries = 0;
625	while cRetries < cMaxRetries:
626	oDir = self.aoDirs[self.oRandom.choice(xrange(len(self.aoDirs)))];
627	# Check fNonEmpty requirement:
628	if not fNonEmpty or oDir.aoChildren:
629	# Check leaf requirement:
630	if not fLeaf:
631	for oChild in oDir.aoChildren:
632	if isinstance(oChild, TestDir):
633	continue; # skip it.
634
635	# Return if in the tree:
636	oParent = oDir.oParent;
637	while oParent is not None:
638	if oParent is self.oTreeDir:
639	return oDir;
640	oParent = oParent.oParent;
641	cRetries += 1;
642
643	reporter.errorXcpt('chooseRandomDirFromTree() failed; cMaxRetries=%d' % (cMaxRetries));
644	return None; # make pylint happy
645
646	#
647	# Unit testing.
648	#
649
650	# pylint: disable=missing-docstring
651	# pylint: disable=undefined-variable
652	class TestFileSetUnitTests(unittest.TestCase):
653	def testGeneral(self):
654	oSet = TestFileSet(False, '/tmp', 'unittest');
655	self.assertTrue(isinstance(oSet.chooseRandomDirFromTree(), TestDir));
656	self.assertTrue(isinstance(oSet.chooseRandomFile(), TestFile));
657
658	def testHexFormatBytes(self):
659	self.assertEqual(TestFile.hexFormatBytes(bytearray([0,1,2,3,4,5,6,7,8,9])),
660	'00 01 02 03 04 05 06 07-08 09');
661	self.assertEqual(TestFile.hexFormatBytes(memoryview(bytearray([0,1,2,3,4,5,6,7,8,9,10, 16]))),
662	'00 01 02 03 04 05 06 07-08 09 0a 10');
663
664
665	if __name__ == '__main__':
666	unittest.main();
667	# not reached.
668

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source: vbox/trunk/src/VBox/ValidationKit/testdriver/testfileset.py@ 84894

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