fake_filesystem.py incorrectly resolves the path "a/b/../non_existent_folder/../file"

[GoogleCodeExporter]

Given the filesystem
  a
  a/file
  a/b
fake_filesystem resolves "a/b/../non_existent_folder/../file" to file, but is 
should raise OSError

STEPS TO REPRODUCE:
fake_filesystem_vs_real_test.py contains a test case for this 
(testBadRelativePath) which is currently disabled.   Enable it


EXPECTED RESULTS:
 isfile(path) -> False
 exists(path) -> False
 stat(path).st_size -> raise OSError

OBSERVED RESULTS:
 isfile(path) -> True
 exists(path) -> True
 stat(path).st_size -> 8 (size of final file)

Original issue reported on code.google.com by jsill...@gmail.com on 24 Feb 2010 at 11:49

[GoogleCodeExporter]

Original comment by dba...@google.com on 21 May 2013 at 8:18

• Changed state: Accepted

[GoogleCodeExporter]

Original comment by dba...@google.com on 30 May 2013 at 9:30

• Changed state: Started

[GoogleCodeExporter]

This issue was closed by revision f5c5a3bd3079.

Original comment by dba...@google.com on 31 May 2013 at 5:14

• Changed state: Fixed