Make sure symlinks are considered in some functions

- resolve path for os.path.size and os.path.getmtime/getatime/getctime
- see #210

CHANGES.md

@@ -12,6 +12,7 @@ The release versions are PyPi releases.
 #### Infrastructure
 
 #### Fixes
+  * Incorrect handling of symlinks in `os.path.size` and other functions ([#210](../../issues/210)).
   * Failed to create directory with symlink as parent ([#215](../../issues/215)).
   * Incorrect error handling during directory creation ([#209](../../issues/209)). 
   * Creating files in read-only directory was possible ([#203](../../issues/203)).

fake_filesystem_test.py

@@ -632,6 +632,15 @@ def testGetsize(self):
         self.filesystem.CreateFile(file_path, contents='1234567')
         self.assertEqual(7, self.path.getsize('FOO/BAR/BAZ'))
 
+    def testGetsizeWithLoopingSymlink(self):
+        self.filesystem.is_windows_fs = False
+        dir_path = '/foo/bar'
+        self.filesystem.CreateDirectory(dir_path)
+        link_path = dir_path + "/link"
+        link_target = link_path + "/link"
+        self.os.symlink(link_target, link_path)
+        self.assertRaisesOSError(errno.ELOOP, self.os.path.getsize, link_path)
+
     def testGetMtime(self):
         test_file = self.filesystem.CreateFile('foo/bar1.txt')
         test_file.SetMTime(24)
@@ -1458,6 +1467,7 @@ def testMkdirRaisesIfParentIsReadOnly(self):
         self.assertRaises(Exception, self.os.mkdir, directory)
 
     def testMkdirWithWithSymlinkParent(self):
+        self.filesystem.is_windows_fs = False
         dir_path = '/foo/bar'
         self.filesystem.CreateDirectory(dir_path)
         link_path = '/foo/link'
@@ -1494,9 +1504,9 @@ def testMakedirsRaisesIfParentIsBrokenLink(self):
     def testMakedirsRaisesIfParentIsLoopingLink(self):
         dir_path = '/foo/bar'
         self.filesystem.CreateDirectory(dir_path)
-        link_target = dir_path + "/link"
-        link_path = link_target + "/link"
-        self.os.symlink(link_path, link_target)
+        link_path = dir_path + "/link"
+        link_target = link_path + "/link"
+        self.os.symlink(link_target, link_path)
         self.assertRaisesOSError(errno.ELOOP, self.os.makedirs, link_path)
 
     def testMakedirsRaisesIfAccessDenied(self):

pyfakefs/fake_filesystem.py

@@ -2644,7 +2644,7 @@ def getsize(self, path):
           file size in bytes.
         """
         try:
-            file_obj = self.filesystem.GetObject(path)
+            file_obj = self.filesystem.ResolveObject(path)
             return file_obj.st_size
         except IOError as exc:
             raise os.error(exc.errno, exc.strerror)
@@ -2698,7 +2698,7 @@ def getmtime(self, path):
             OSError: if the file does not exist.
         """
         try:
-            file_obj = self.filesystem.GetObject(path)
+            file_obj = self.filesystem.ResolveObject(path)
         except IOError as exc:
             raise OSError(errno.ENOENT, str(exc))
         return file_obj.st_mtime
@@ -2718,7 +2718,7 @@ def getatime(self, path):
             OSError: if the file does not exist.
         """
         try:
-            file_obj = self.filesystem.GetObject(path)
+            file_obj = self.filesystem.ResolveObject(path)
         except IOError as exc:
             raise OSError(errno.ENOENT, str(exc))
         return file_obj.st_atime
@@ -2736,7 +2736,7 @@ def getctime(self, path):
             OSError: if the file does not exist.
         """
         try:
-            file_obj = self.filesystem.GetObject(path)
+            file_obj = self.filesystem.ResolveObject(path)
         except IOError as exc:
             raise OSError(errno.ENOENT, str(exc))
         return file_obj.st_ctime

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist=py26,py27,py33,py34,py35,py36
+envlist=py26,py27,py33,py34,py35,py36,py37,pypy
 
 [testenv]
 deps = -rrequirements.txt