test(core): use a seeded PRNG for mocking os.urandom

[romanz]

Following #6284 (comment).

[github-actions]

en main(all)

model	device_test	click_test	persistence_test
T2T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)	test(all) main(all)

Translations

cs main(all)

model	device_test	click_test
T2T1	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)

de main(all)

model	device_test	click_test
T2T1	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)

es main(all)

model	device_test	click_test
T2T1	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)

fr main(all)

model	device_test	click_test
T2T1	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)

pt main(all)

model	device_test	click_test
T2T1	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)

Latest CI run: 20661938617

[romanz]

The above fixtures don't reproduce when running locally:

$ pytest -v tests/device_tests/thp/test_pairing.py --control-emulators -n 12 --model core --ui test
...
-------- UI tests summary: --------
UI_FAILED: T3W1_en-device_tests-thp-test_pairing.py::test_pairing_code_entry (d8b74025298a968b9429134c15fbc04ed5beb9dfa7beec9e679bbf10e3187e39)
UI_FAILED: T3W1_en-device_tests-thp-test_pairing.py::test_pairing_code_entry_cancel (d8b74025298a968b9429134c15fbc04ed5beb9dfa7beec9e679bbf10e3187e39)
UI_FAILED: T3W1_en-device_tests-thp-test_pairing.py::test_pairing_code_entry_invalid_cpace_key (d8b74025298a968b9429134c15fbc04ed5beb9dfa7beec9e679bbf10e3187e39)
UI_FAILED: T3W1_en-device_tests-thp-test_pairing.py::test_pairing_code_entry_invalid_cpace_key_length (d8b74025298a968b9429134c15fbc04ed5beb9dfa7beec9e679bbf10e3187e39)
Run ./tests/show_results.py to open test summary

-------- Accepting all recent UI changes: --------
Run ./tests/update_fixtures.py to apply all changes

===================================================================================== 12 passed, 1 xfailed, 13 warnings, 4 ui_failed in 12.75s =====================================================================================

[romanz]

Will be implemented as part of #6273.