[telemetry] Script for finding all Telemetry dependencies.

tools/telemetry_tools/path_set_unittest.py

+#!/usr/bin/env python
+# Copyright (c) 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
+
+import path_set
+
+
+class PathSetTest(unittest.TestCase):
+  def testCreate(self):
+    ps = path_set.PathSet()
+    self.assertEqual(len(ps), 0)
+    self.assertFalse(__file__ in ps)
+    for path in ps:
+      self.fail('New set is not empty.')
+
+    ps = path_set.PathSet([__file__])
+    self.assertEqual(len(ps), 1)
+    self.assertTrue(__file__ in ps)
+    self.assertEqual(ps.pop(), os.path.realpath(__file__))
+
+  def testAdd(self):
+    ps = path_set.PathSet()
+    ps.add(__file__)
+    self.assertEqual(len(ps), 1)
+    self.assertTrue(__file__ in ps)
+    self.assertEqual(ps.pop(), os.path.realpath(__file__))
+
+  def testDiscard(self):
+    ps = path_set.PathSet([__file__])
+    ps.discard(__file__)
+    self.assertEqual(len(ps), 0)
+    self.assertFalse(__file__ in ps)
+
+
+if __name__ == '__main__':
+  unittest.main()