we were reported that getTextAtOffset returns wrong results if the given offset is after an object spanned at mutiple lines for example <p>this works well <a>mutli<br>lines</a> any offset starting from here doesn't work</p>

apparently the bug was fixed, I cannot longer reproduce it on Nightly (both word_start and line_start) so we need to have mochitest coverage (see text/test_wordboundary.html and test_lineboundary.html). Volunteers?

I would like to work on this, but this is my first bug so I'd need some help. I have firefox built, but when I run: ./mach mochitest-browser accessible/tests/mochitest/text/test_wordoundary.html I get: From _tests: Kept 20658 existing; Added/updated 0; Removed 0 files and 0 directories. No tests could be found in the path specified. Please specify a path that is a test file or is a directory containing tests.

For anyone interested in working on this bug, I found out that the command to run accessibility tests is: ./mach mochitest-a11y accessible/tests/mochitest/text/test_wordoundary.html As documented here: https://developer.mozilla.org/en-US/docs/Mozilla/QA/Automated_testing

Hi, I would like to work on this bug. Can I be assigned this.

Hello. I tried to run the tests on as specified by https://bugzilla.mozilla.org/show_bug.cgi?id=857476#c3 Attached is the full output of the errors I got. It threw an error regarding a read-only filesystem in /tmp. Regardless of whether I used sudo or the root user. Any suggestions on what to do next are welcomed. Error as normal user: user@localhost:~/mozilla-central$ ./mach mochitest-a11y accessible/tests/mochitest/text/test_wordboundary.html mkdir: cannot create directory ‘/tmp/cg-5034’: Read-only file system config.guess: cannot create a temporary directory in /tmp Error running mach: ['mochitest-a11y', 'accessible/tests/mochitest/text/test_wordboundary.html'] The error occurred in code that was called by the mach command. This is either a bug in the called code itself or in the way that mach is calling it. You should consider filing a bug for this issue. If filing a bug, please include the full output of mach, including this error message. The details of the failure are as follows: CalledProcessError: Command '[u'/home/user/mozilla-central/build/autoconf/config.guess']' returned non-zero exit status 1 File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 716, in __init__ self._ensure_state_subdir_exists('.') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 432, in _ensure_state_subdir_exists path = os.path.join(self.statedir, subdir) File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 266, in statedir return os.path.join(self.topobjdir, '.mozbuild') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 192, in topobjdir default='obj-@CONFIG_GUESS@') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 181, in resolve_mozconfig_topobjdir self.resolve_config_guess()) File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 364, in resolve_config_guess subprocess.check_output(args, cwd=self.topsrcdir).strip()) File "/usr/lib/python2.7/subprocess.py", line 219, in check_output raise CalledProcessError(retcode, cmd, output=output) Error using sudo to grant permission to access the /tmp folder: user@localhost:~/mozilla-central$ sudo ./mach mochitest-a11y accessible/tests/mochitest/text/test_wordboundary.html sudo: unable to open /var/lib/sudo/ts/user: Read-only file system [sudo] password for user: mkdir: cannot create directory ‘/tmp/cg-5060’: Read-only file system config.guess: cannot create a temporary directory in /tmp Error running mach: ['mochitest-a11y', 'accessible/tests/mochitest/text/test_wordboundary.html'] The error occurred in code that was called by the mach command. This is either a bug in the called code itself or in the way that mach is calling it. You should consider filing a bug for this issue. If filing a bug, please include the full output of mach, including this error message. The details of the failure are as follows: CalledProcessError: Command '[u'/home/user/mozilla-central/build/autoconf/config.guess']' returned non-zero exit status 1 File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 716, in __init__ self._ensure_state_subdir_exists('.') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 432, in _ensure_state_subdir_exists path = os.path.join(self.statedir, subdir) File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 266, in statedir return os.path.join(self.topobjdir, '.mozbuild') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 192, in topobjdir default='obj-@CONFIG_GUESS@') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 181, in resolve_mozconfig_topobjdir self.resolve_config_guess()) File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 364, in resolve_config_guess subprocess.check_output(args, cwd=self.topsrcdir).strip()) File "/usr/lib/python2.7/subprocess.py", line 219, in check_output raise CalledProcessError(retcode, cmd, output=output) Error running as root: root@localhost:/home/user/mozilla-central# ./mach mochitest-a11y accessible/tests/mochitest/text/test_wordboundary.html mkdir: cannot create directory ‘/tmp/cg-5118’: Read-only file system config.guess: cannot create a temporary directory in /tmp Error running mach: ['mochitest-a11y', 'accessible/tests/mochitest/text/test_wordboundary.html'] The error occurred in code that was called by the mach command. This is either a bug in the called code itself or in the way that mach is calling it. You should consider filing a bug for this issue. If filing a bug, please include the full output of mach, including this error message. The details of the failure are as follows: CalledProcessError: Command '[u'/home/user/mozilla-central/build/autoconf/config.guess']' returned non-zero exit status 1 File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 716, in __init__ self._ensure_state_subdir_exists('.') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 432, in _ensure_state_subdir_exists path = os.path.join(self.statedir, subdir) File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 266, in statedir return os.path.join(self.topobjdir, '.mozbuild') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 192, in topobjdir default='obj-@CONFIG_GUESS@') File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 181, in resolve_mozconfig_topobjdir self.resolve_config_guess()) File "/home/user/mozilla-central/python/mozbuild/mozbuild/base.py", line 364, in resolve_config_guess subprocess.check_output(args, cwd=self.topsrcdir).strip()) File "/usr/lib/python2.7/subprocess.py", line 219, in check_output raise CalledProcessError(retcode, cmd, output=output)

The above errors were caused by a problem with my system. Once /tmp was no longer a read-only filesystem, I re-ran the test. |./mach mochitest-a11y accessible/tests/mochitest/text/test_wordoundary.html| is an outdated way of running the test. The test is run as follows: ./mach mochitest accessible/tests/mochitest/text/test_wordboundary.html Mochitest will then detect that you're running an accessibility test and will load mochitest-a11y. Sample output: 6283 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAtOffset (word start): wrong start offset(got '0', expected: '0'), offset: 1, id: 'cntr_1' ; 6284 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAtOffset (word start): wrong end offset(got '2', expected: '2'), offset: 1, id: 'cntr_1' ; 6285 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAtOffset (word start): wrong text (got '', expected: ''), offset: 2, id: 'cntr_1' ; 6286 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAtOffset (word start): wrong start offset(got '2', expected: '2'), offset: 2, id: 'cntr_1' ; 6287 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAtOffset (word start): wrong end offset(got '3', expected: '3'), offset: 2, id: 'cntr_1' ; 6288 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAtOffset (word start): wrong text (got '', expected: ''), offset: 3, id: 'cntr_1' ; 6289 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAtOffset (word start): wrong start offset(got '2', expected: '2'), offset: 3, id: 'cntr_1' ; 6290 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAtOffset (word start): wrong end offset(got '3', expected: '3'), offset: 3, id: 'cntr_1' ; 6291 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong text (got '', expected: ''), offset: 0, id: 'cntr_1' ; 6292 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong start offset(got '2', expected: '2'), offset: 0, id: 'cntr_1' ; 6293 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong end offset(got '3', expected: '3'), offset: 0, id: 'cntr_1' ; 6294 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong text (got '', expected: ''), offset: 1, id: 'cntr_1' ; 6295 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong start offset(got '2', expected: '2'), offset: 1, id: 'cntr_1' ; 6296 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong end offset(got '3', expected: '3'), offset: 1, id: 'cntr_1' ; 6297 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong text (got '', expected: ''), offset: 2, id: 'cntr_1' ; 6298 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong start offset(got '3', expected: '3'), offset: 2, id: 'cntr_1' ; 6299 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong end offset(got '3', expected: '3'), offset: 2, id: 'cntr_1' ; 6300 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong text (got '', expected: ''), offset: 3, id: 'cntr_1' ; 6301 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong start offset(got '3', expected: '3'), offset: 3, id: 'cntr_1' ; 6302 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | getTextAfterOffset (word start): wrong end offset(got '3', expected: '3'), offset: 3, id: 'cntr_1' ; GECKO(2234) | MEMORY STAT vsizeMaxContiguous not supported in this build configuration. GECKO(2234) | MEMORY STAT | vsize 1935MB | residentFast 292MB | heapAllocated 127MB 6303 INFO TEST-OK | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html | took 4247ms 6304 INFO TEST-START | Shutdown 6305 INFO Passed: 6250 6306 INFO Failed: 0 6307 INFO Todo: 50 6308 INFO Mode: non-e10s 6309 INFO Slowest: 4247ms - chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_wordboundary.html 6310 INFO SimpleTest FINISHED 6311 INFO TEST-INFO | Ran 1 Loops 6312 INFO SimpleTest FINISHED GECKO(2234) | [2234] WARNING: g_type_add_interface_static: assertion 'g_type_parent (interface_type) == G_TYPE_INTERFACE' failed: 'glib warning', file /home/herabus/mozilla-central/toolkit/xre/nsSigHandlers.cpp, line 142 GECKO(2234) | (firefox:2234): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion 'g_type_parent (interface_type) == G_TYPE_INTERFACE' failed TEST-INFO | Main app process: exit 0 runtests.py | Application ran for: 0:00:39.184065 zombiecheck | Reading PID log: /tmp/tmpBQFz0fpidlog ==> process 2234 launched child process 2257 zombiecheck | Checking for orphan process with PID: 2257 Stopping web server Stopping web socket server Stopping ssltunnel leakcheck | refcount logging is off, so leaks can't be detected! runtests.py | Running tests: end. Buffered messages finished SUITE-END | took 53s

Running the test replacing test_wordboundary.html with test_lineboundary.html gives the following output. ./mach mochitest accessible/tests/mochitest/text/test_lineboundary.html 3723 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got 'hello', expected: 'hello'), offset: 6, id: 'li10' ; 3724 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '4', expected: '4'), offset: 6, id: 'li10' ; 3725 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '9', expected: '9'), offset: 6, id: 'li10' ; 3726 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got 'hello', expected: 'hello'), offset: 7, id: 'li10' ; 3727 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '4', expected: '4'), offset: 7, id: 'li10' ; 3728 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '9', expected: '9'), offset: 7, id: 'li10' ; 3729 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got 'hello', expected: 'hello'), offset: 8, id: 'li10' ; 3730 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '4', expected: '4'), offset: 8, id: 'li10' ; 3731 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '9', expected: '9'), offset: 8, id: 'li10' ; 3732 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got '', expected: ''), offset: 0, id: 'ol1' ; 3733 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '0', expected: '0'), offset: 0, id: 'ol1' ; 3734 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '1', expected: '1'), offset: 0, id: 'ol1' ; 3735 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got '', expected: ''), offset: 1, id: 'ol1' ; 3736 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '1', expected: '1'), offset: 1, id: 'ol1' ; 3737 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '2', expected: '2'), offset: 1, id: 'ol1' ; 3738 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got '', expected: ''), offset: 2, id: 'ol1' ; 3739 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '2', expected: '2'), offset: 2, id: 'ol1' ; 3740 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '3', expected: '3'), offset: 2, id: 'ol1' ; 3741 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got '', expected: ''), offset: 3, id: 'ol1' ; 3742 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '3', expected: '3'), offset: 3, id: 'ol1' ; 3743 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '4', expected: '4'), offset: 3, id: 'ol1' ; 3744 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got '', expected: ''), offset: 4, id: 'ol1' ; 3745 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '4', expected: '4'), offset: 4, id: 'ol1' ; 3746 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '5', expected: '5'), offset: 4, id: 'ol1' ; 3747 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got '', expected: ''), offset: 5, id: 'ol1' ; 3748 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '4', expected: '4'), offset: 5, id: 'ol1' ; 3749 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '5', expected: '5'), offset: 5, id: 'ol1' ; 3750 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong text (got '', expected: ''), offset: 0, id: 'ht_5' ; 3751 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong start offset(got '0', expected: '0'), offset: 0, id: 'ht_5' ; 3752 INFO TEST-PASS | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | getTextAtOffset (line start): wrong end offset(got '1', expected: '1'), offset: 0, id: 'ht_5' ; GECKO(2583) | MEMORY STAT vsizeMaxContiguous not supported in this build configuration. GECKO(2583) | MEMORY STAT | vsize 1931MB | residentFast 316MB | heapAllocated 155MB 3753 INFO TEST-OK | chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html | took 3197ms 3754 INFO TEST-START | Shutdown 3755 INFO Passed: 3750 3756 INFO Failed: 0 3757 INFO Todo: 0 3758 INFO Mode: non-e10s 3759 INFO Slowest: 3197ms - chrome://mochitests/content/a11y/accessible/tests/mochitest/text/test_lineboundary.html 3760 INFO SimpleTest FINISHED 3761 INFO TEST-INFO | Ran 1 Loops 3762 INFO SimpleTest FINISHED TEST-INFO | Main app process: exit 0 runtests.py | Application ran for: 0:00:12.109489 zombiecheck | Reading PID log: /tmp/tmpzHifYZpidlog ==> process 2583 launched child process 2605 zombiecheck | Checking for orphan process with PID: 2605 Stopping web server Stopping web socket server Stopping ssltunnel leakcheck | refcount logging is off, so leaks can't be detected! runtests.py | Running tests: end. Buffered messages finished SUITE-END | took 13s

(In reply to Leni Kadali from comment #7) > Running the test replacing test_wordboundary.html with > test_lineboundary.html gives the following output. > > ./mach mochitest accessible/tests/mochitest/text/test_lineboundary.html I afraid I'm not helpful on this error. There's something wrong with your system/build > GECKO(2583) | MEMORY STAT vsizeMaxContiguous not supported in this build > configuration. > GECKO(2583) | MEMORY STAT | vsize 1931MB | residentFast 316MB | > heapAllocated 155MB these two likely point to your problem, did you try to ask #developers?