test_random_fixtures.py
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test_random_fixtures.py
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	# Copyright (C) 2021 The Software Heritage developers
	# See the AUTHORS file at the top-level directory of this distribution
	# License: GNU Affero General Public License version 3, or any later version
	# See top-level LICENSE file for more information

	import os
	import subprocess

	pytest_command = ["python3", "-m", "pytest", "-s"]


	def test_random_fixtures():
	"""Check random fixture values will be different when random seed
	is not explicitly provided.
	"""
	result_first = subprocess.run(
	[*pytest_command, "random_fixtures_test.py"],
	capture_output=True,
	cwd=os.path.dirname(__file__),
	)
	result_second = subprocess.run(
	[*pytest_command, "random_fixtures_test.py"],
	capture_output=True,
	cwd=os.path.dirname(__file__),
	)
	assert result_first.stderr != result_second.stderr
	assert b'Use "pytest --swh-web-random-seed=' in result_first.stdout


	def test_random_fixtures_with_seed():
	"""Check random fixture values will be the same when random seed
	is explicitly provided through a custom pytest option.
	"""
	result_first = subprocess.run(
	[*pytest_command, "--swh-web-random-seed=2021", "random_fixtures_test.py"],
	capture_output=True,
	cwd=os.path.dirname(__file__),
	)
	result_second = subprocess.run(
	[*pytest_command, "--swh-web-random-seed=2021", "random_fixtures_test.py"],
	capture_output=True,
	cwd=os.path.dirname(__file__),
	)
	assert result_first.stderr == result_second.stderr
	assert b'Use "pytest --swh-web-random-seed=2021' in result_first.stdout