Unify method name casing in devtools.

mojo/devtools/common/devtoolslib/shell_arguments_unittest.py

 # Copyright 2015 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 imp
 import os.path
 import sys
 import unittest
 
 try:
   imp.find_module("devtoolslib")
 except ImportError:
   sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 from devtoolslib import shell_arguments
 
 
 class AppendToArgumentTest(unittest.TestCase):
   """Tests AppendToArgument()."""
 
-  def testAppendToEmpty(self):
+  def test_append_to_empty(self):
     arguments = []
     key = '--something='
     value = 'val'
     expected_result = ['--something=val']
     self.assertEquals(expected_result, shell_arguments.append_to_argument(
         arguments, key, value))
 
-  def testAppendToNonEmpty(self):
+  def test_append_to_non_empty(self):
     arguments = ['--other']
     key = '--something='
     value = 'val'
     expected_result = ['--other', '--something=val']
     self.assertEquals(expected_result, shell_arguments.append_to_argument(
         arguments, key, value))
 
-  def testAppendToExisting(self):
+  def test_append_to_existing(self):
     arguments = ['--something=old_val']
     key = '--something='
     value = 'val'
     expected_result = ['--something=old_val,val']
     self.assertEquals(expected_result, shell_arguments.append_to_argument(
         arguments, key, value))
 
 
 if __name__ == "__main__":
   unittest.main()