esp-idf/examples/peripherals/can/can_network/example_test.py

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# Need Python 3 string formatting functions
from __future__ import print_function
from threading import Thread
import ttfw_idf
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# Define tuple of strings to expect for each DUT.
master_expect = ("CAN Master: Driver installed", "CAN Master: Driver uninstalled")
slave_expect = ("CAN Slave: Driver installed", "CAN Slave: Driver uninstalled")
listen_only_expect = ("CAN Listen Only: Driver installed", "CAN Listen Only: Driver uninstalled")
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def dut_thread_callback(**kwargs):
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# Parse keyword arguments
dut = kwargs['dut'] # Get DUT from kwargs
expected = kwargs['expected']
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result = kwargs['result'] # Get result[out] from kwargs. MUST be of mutable type e.g. list
# Must reset again as flashing during start_app will reset multiple times, causing unexpected results
dut.reset()
for string in expected:
dut.expect(string, 20)
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# Mark thread has run to completion without any exceptions
result[0] = True
@ttfw_idf.idf_example_test(env_tag='Example_CAN2')
def test_can_network_example(env, extra_data):
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# Get device under test. "dut1", "dut2", and "dut3" must be properly defined in EnvConfig
dut_master = env.get_dut("dut1", "examples/peripherals/can/can_network/can_network_master")
dut_slave = env.get_dut("dut2", "examples/peripherals/can/can_network/can_network_slave")
dut_listen_only = env.get_dut("dut3", "examples/peripherals/can/can_network/can_network_listen_only")
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# Flash app onto each DUT, each DUT is reset again at the start of each thread
dut_master.start_app()
dut_slave.start_app()
dut_listen_only.start_app()
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# Create dict of keyword arguments for each dut
results = [[False], [False], [False]]
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master_kwargs = {"dut": dut_master, "result": results[0], "expected": master_expect}
slave_kwargs = {"dut": dut_slave, "result": results[1], "expected": slave_expect}
listen_only_kwargs = {"dut": dut_listen_only, "result": results[2], "expected": listen_only_expect}
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# Create thread for each dut
dut_master_thread = Thread(target=dut_thread_callback, name="Master Thread", kwargs=master_kwargs)
dut_slave_thread = Thread(target=dut_thread_callback, name="Slave Thread", kwargs=slave_kwargs)
dut_listen_only_thread = Thread(target=dut_thread_callback, name="Listen Only Thread", kwargs=listen_only_kwargs)
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# Start each thread
dut_listen_only_thread.start()
dut_master_thread.start()
dut_slave_thread.start()
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# Wait for threads to complete
dut_listen_only_thread.join()
dut_master_thread.join()
dut_slave_thread.join()
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# check each thread ran to completion
for result in results:
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if result[0] is not True:
raise Exception("One or more threads did not run successfully")
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if __name__ == '__main__':
test_can_network_example()