Adding screenon instrument

wlauto/instrumentation/screenon/__init__.py

@@ -0,0 +1,36 @@
+#    Copyright 2015 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# pylint: disable=unused-argument
+from wlauto import Instrument
+from wlauto.exceptions import InstrumentError
+
+
+class ScreenOnInstrument(Instrument):
+
+    name = 'screenon'
+
+    description = """
+    Ensure screen is on before each iteration on Android devices.
+
+    A very basic instrument that checks that the screen is on on android devices.
+
+    """
+
+    def initialize(self, context):
+        if self.device.platform != 'android':
+            raise InstrumentError('screenon instrument currently only supports Android devices.')
+
+    def slow_setup(self, context):   # slow to run before most other setups
+        self.device.ensure_screen_is_on()