Refactor the unit tests.

tests/__init__.py

Index: tests/__init__.py
diff --git a/tests/__init__.py b/tests/__init__.py
index b956655dcef59e451a67466f830b13bb4527c8be..fe852d5e9308645482cae911e725fd8ac039c1bc 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -4,35 +4,3 @@
 # found in the LICENSE file.
 
 """Unit tests for depot_tools."""
-
-mox = None
-
-def OnTestsLoad():
-  import os
-  import sys
-  old_path = sys.path
-  global mox
-  try:
-    directory, _file = os.path.split(__file__)
-    sys.path.append(os.path.abspath(os.path.join(directory, 'pymox')))
-    sys.path.append(os.path.abspath(os.path.join(directory, '..')))
-    try:
-      import mox as Mox
-      mox = Mox
-    except ImportError:
-      print "Trying to automatically checkout pymox."
-      import subprocess
-      subprocess.call(['svn', 'co', 'http://pymox.googlecode.com/svn/trunk',
-                       os.path.join(directory, 'pymox')],
-                      shell=True)
-      try:
-        import mox as Mox
-        mox = Mox
-      except ImportError:
-        print >> sys.stderr, ("\nError, failed to load pymox\n")
-        raise
-  finally:
-    # Restore the path
-    sys.path = old_path
-
-OnTestsLoad()