Add file permissions to filesystem_mock

third_party/WebKit/Tools/Scripts/webkitpy/common/system/filesystem_mock.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/common/system/filesystem_mock.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/common/system/filesystem_mock.py b/third_party/WebKit/Tools/Scripts/webkitpy/common/system/filesystem_mock.py
index 44c7d8043d507f9dad2c683232b2e28ea01e5dd7..70d80af18ab339f6a8cdad1134b5da4fd63bfd88 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/common/system/filesystem_mock.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/common/system/filesystem_mock.py
@@ -39,7 +39,7 @@ class MockFileSystem(object):
     sep = '/'
     pardir = '..'
 
-    def __init__(self, files=None, dirs=None, cwd='/'):
+    def __init__(self, files=None, dirs=None, cwd='/', permissions=None):
         """Initializes a "mock" filesystem that can be used to completely
         stub out a filesystem.
 
@@ -49,6 +49,7 @@ class MockFileSystem(object):
                 not exist.
         """
         self.files = files or {}
+        self.permissions = permissions or {}
         self.written_files = {}
         self.last_tmpdir = None
         self.current_tmpno = 0
@@ -56,11 +57,13 @@ class MockFileSystem(object):
         self.dirs = set(dirs or [])
         self.dirs.add(cwd)
         for f in self.files:
+            while f not in self.permissions:

[qyearsley, 2016/06/15 18:35:38]

while -> if

+                self.permissions[f] = False
+        for f in self.files:
             d = self.dirname(f)
             while not d in self.dirs:
                 self.dirs.add(d)
                 d = self.dirname(d)
-
     def clear_written_files(self):
         # This function can be used to track what is written between steps in a test.
         self.written_files = {}
@@ -75,6 +78,13 @@ class MockFileSystem(object):
             return path.rsplit(self.sep, 1)
         return ('', path)
 
+    def chmod(self, file_path, mode):

[qyearsley, 2016/06/15 18:35:38]

If we're changing the public API of the FileSystem class (the public methods) to
include make_executable and is_executable, then we don't need chmod.

+        self.make_executable(file_path)
+        mode = mode
+
+    def make_executable(self, file_path):
+        self.permissions[file_path] = True
+
     def abspath(self, path):
         if os.path.isabs(path):
             return self.normpath(path)