Import Mbed OS hard-float snapshot

TESTS/host_tests/sync_on_reset.py

@@ -0,0 +1,74 @@
+"""
+Copyright (c) 2018-2019 Arm Limited and affiliates.
+
+SPDX-License-Identifier: Apache-2.0
+
+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.
+"""
+import time
+from mbed_host_tests import BaseHostTest
+
+DEFAULT_SYNC_DELAY = 4.0
+
+MSG_VALUE_DUMMY = '0'
+MSG_KEY_DEVICE_READY = 'ready'
+MSG_KEY_START_CASE = 'start_case'
+MSG_KEY_DEVICE_RESET = 'reset_on_case_teardown'
+MSG_KEY_SYNC = '__sync'
+
+
+class SyncOnReset(BaseHostTest):
+    """Host side test that handles device reset during case teardown.
+
+    Given a device that performs a reset during a test case teardown.
+    When the device notifies the host about the reset.
+    Then the host:
+    * keeps track of the test case index of the current test suite,
+    * performs a dev-host handshake,
+    * advances the test suite to next test case.
+
+    Note:
+    Developed for a watchdog test, so that it can be run on devices that
+    do not support watchdog timeout updates after the initial setup.
+    As a solution, after testing watchdog with one set of settings, the
+    device performs a reset and notifies the host with the test case number,
+    so that the test suite may be advanced once the device boots again.
+    """
+
+    def __init__(self):
+        super(SyncOnReset, self).__init__()
+        self.test_case_num = 0
+        self.sync_delay = DEFAULT_SYNC_DELAY
+
+    def setup(self):
+        sync_delay = self.get_config_item('forced_reset_timeout')
+        self.sync_delay = sync_delay if sync_delay is not None else DEFAULT_SYNC_DELAY
+        self.register_callback(MSG_KEY_DEVICE_READY, self.cb_device_ready)
+        self.register_callback(MSG_KEY_DEVICE_RESET, self.cb_device_reset)
+
+    def cb_device_ready(self, key, value, timestamp):
+        """Advance the device test suite to the next test case."""
+        self.send_kv(MSG_KEY_START_CASE, self.test_case_num)
+
+    def cb_device_reset(self, key, value, timestamp):
+        """Wait for the device to boot and perform a handshake.
+
+        Additionally, keep track of the last test case number.
+        """
+        try:
+            self.test_case_num = int(value)
+        except ValueError:
+            pass
+        self.test_case_num += 1
+        time.sleep(self.sync_delay)
+        self.send_kv(MSG_KEY_SYNC, MSG_VALUE_DUMMY)