1 files changed, 52 insertions, 0 deletions
diff --git a/catapult/common/py_vulcanize/py_vulcanize/fake_fs_unittest.py b/catapult/common/py_vulcanize/py_vulcanize/fake_fs_unittest.py
new file mode 100644
index 00000000..08250138
--- /dev/null
+++ b/catapult/common/py_vulcanize/py_vulcanize/fake_fs_unittest.py
@@ -0,0 +1,52 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import unittest
+
+from py_vulcanize import fake_fs
+
+
+class FakeFSUnittest(unittest.TestCase):
+
+  def testBasic(self):
+    fs = fake_fs.FakeFS()
+    fs.AddFile('/blah/x', 'foobar')
+    with fs:
+      assert os.path.exists(os.path.normpath('/blah/x'))
+      self.assertEquals(
+          'foobar',
+          open(os.path.normpath('/blah/x'), 'r').read())
+
+  def testWithableOpen(self):
+    fs = fake_fs.FakeFS()
+    fs.AddFile('/blah/x', 'foobar')
+    with fs:
+      with open(os.path.normpath('/blah/x'), 'r') as f:
+        self.assertEquals('foobar', f.read())
+
+  def testWalk(self):
+    fs = fake_fs.FakeFS()
+    fs.AddFile('/x/w2/w3/z3.txt', '')
+    fs.AddFile('/x/w/z.txt', '')
+    fs.AddFile('/x/y.txt', '')
+    fs.AddFile('/a.txt', 'foobar')
+    with fs:
+      gen = os.walk(os.path.normpath('/'))
+      r = gen.next()
+      self.assertEquals((os.path.normpath('/'), ['x'], ['a.txt']), r)
+
+      r = gen.next()
+      self.assertEquals((os.path.normpath('/x'), ['w', 'w2'], ['y.txt']), r)
+
+      r = gen.next()
+      self.assertEquals((os.path.normpath('/x/w'), [], ['z.txt']), r)
+
+      r = gen.next()
+      self.assertEquals((os.path.normpath('/x/w2'), ['w3'], []), r)
+
+      r = gen.next()
+      self.assertEquals((os.path.normpath('/x/w2/w3'), [], ['z3.txt']), r)
+
+      self.assertRaises(StopIteration, gen.next)