1# Copyright 2014 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5
6class TestInstance(object):
7  """A type of test.
8
9  This is expected to handle all logic that is test-type specific but
10  independent of the environment or device.
11
12  Examples include:
13    - gtests
14    - instrumentation tests
15  """
16
17  def __init__(self):
18    pass
19
20  def TestType(self):
21    raise NotImplementedError
22
23  def SetUp(self):
24    raise NotImplementedError
25
26  def TearDown(self):
27    raise NotImplementedError
28
29  def __enter__(self):
30    self.SetUp()
31    return self
32
33  def __exit__(self, _exc_type, _exc_val, _exc_tb):
34    self.TearDown()
35
36