Fix directory layout for tools/memory_inspector tests.

tools/memory_inspector/memory_inspector/core/backends_unittest.py

Index: tools/memory_inspector/memory_inspector/core/backends_unittest.py
diff --git a/tools/memory_inspector/memory_inspector/core/backends_unittest.py b/tools/memory_inspector/memory_inspector/core/backends_unittest.py
new file mode 100644
index 0000000000000000000000000000000000000000..f204028ff05276213a6a4198b1a5f77b96fd2ef1
--- /dev/null
+++ b/tools/memory_inspector/memory_inspector/core/backends_unittest.py
@@ -0,0 +1,53 @@
+# 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 unittest
+
+from memory_inspector.core import backends
+
+
+class MockDevice(backends.Device):  # pylint: disable=W0223
+  def __init__(self, backend, device_id):
+    super(MockDevice, self).__init__(backend)
+    self.device_id = device_id
+
+  @property
+  def name(self):
+    return "Mock Device %s" % self.device_id
+
+  @property
+  def id(self):
+    return self.device_id
+
+
+class MockBackend(backends.Backend):
+  _SETTINGS = {'key_1': 'key descritpion 1'}
+
+  def __init__(self, backend_name):
+    super(MockBackend, self).__init__(MockBackend._SETTINGS)
+    self.backend_name = backend_name
+
+  def EnumerateDevices(self):
+    yield MockDevice(self, 'device-1')
+    yield MockDevice(self, 'device-2')
+
+  @property
+  def name(self):
+    return self.backend_name
+
+
+class BackendRegisterTest(unittest.TestCase):
+  def runTest(self):
+    mock_backend_1 = MockBackend('mock-backend-1')
+    mock_backend_2 = MockBackend('mock-backend-2')
+    self.assertEqual(mock_backend_1.settings['key_1'], 'key descritpion 1')
+    backends.Register(mock_backend_1)
+    backends.Register(mock_backend_2)
+    devices = list(backends.ListDevices())
+    self.assertEqual(len(devices), 4)
+    self.assertIsNotNone(backends.GetDevice('mock-backend-1', 'device-1'))
+    self.assertIsNotNone(backends.GetDevice('mock-backend-1', 'device-2'))
+    self.assertIsNotNone(backends.GetDevice('mock-backend-2', 'device-1'))
+    self.assertIsNotNone(backends.GetDevice('mock-backend-2', 'device-1'))
+    self.assertTrue('key_1' in mock_backend_1.settings)