[apparmor] [patch] parser: make caching tests not fail w/python <= 3.2

[Seth Arnold]

On Wed, Aug 26, 2015 at 04:22:46PM -0700, Steve Beattie wrote:
> v2: change logic for python2.x versions.
> 
> Signed-off-by: Steve Beattie <steve at nxnw.org>

Acked-by: Seth Arnold <seth.arnold at canonical.com>

Thanks

> ---
>  parser/tst/caching.py |   21 ++++++++++++++++++---
>  1 file changed, 18 insertions(+), 3 deletions(-)
> 
> Index: b/parser/tst/caching.py
> ===================================================================
> --- a/parser/tst/caching.py
> +++ b/parser/tst/caching.py
> @@ -17,6 +17,7 @@
>  
>  from argparse import ArgumentParser
>  import os
> +import platform
>  import shutil
>  import time
>  import tempfile
> @@ -232,10 +233,24 @@ class AAParserCachingTests(AAParserCachi
>          self.run_cmd_check(cmd)
>          self.assert_path_exists(self.cache_file)
>  
> +    def _assertTimeStampEquals(self, time1, time2):
> +        '''Compare two timestamps to ensure equality'''
> +
> +        # python 3.2 and earlier don't support writing timestamps with
> +        # nanosecond resolution, only microsecond. When comparing
> +        # timestamps in such an environment, loosen the equality bounds
> +        # to compensate
> +        # Reference: https://bugs.python.org/issue12904
> +        (major, minor, _) = platform.python_version_tuple()
> +        if (int(major) < 3) or ((int(major) == 3) and (int(minor) <= 2)):
> +            self.assertAlmostEquals(time1, time2, places=5)
> +        else:
> +            self.assertEquals(time1, time2)
> +
>      def _set_mtime(self, path, mtime):
>          atime = os.stat(path).st_atime
>          os.utime(path, (atime, mtime))
> -        self.assertEquals(os.stat(path).st_mtime, mtime)
> +        self._assertTimeStampEquals(os.stat(path).st_mtime, mtime)
>  
>      def test_cache_loaded_when_exists(self):
>          '''test cache is loaded when it exists, is newer than profile,  and features match'''
> @@ -414,7 +429,7 @@ class AAParserCachingTests(AAParserCachi
>  
>          stat = os.stat(self.cache_file)
>          self.assertNotEquals(orig_stat.st_ino, stat.st_ino)
> -        self.assertEquals(profile_mtime, stat.st_mtime)
> +        self._assertTimeStampEquals(profile_mtime, stat.st_mtime)
>  
>      def test_abstraction_newer_rewrites_cache(self):
>          '''test cache is rewritten if abstraction is newer'''
> @@ -431,7 +446,7 @@ class AAParserCachingTests(AAParserCachi
>  
>          stat = os.stat(self.cache_file)
>          self.assertNotEquals(orig_stat.st_ino, stat.st_ino)
> -        self.assertEquals(abstraction_mtime, stat.st_mtime)
> +        self._assertTimeStampEquals(abstraction_mtime, stat.st_mtime)
>  
>      def test_parser_newer_uses_cache(self):
>          '''test cache is not skipped if parser is newer'''
> 
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