38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
from __future__ import print_function
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import pytest
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def pytest_collection_modifyitems(config, items):
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"""
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This adds a pytest marker that consistently shards all collected tests.
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Use it like the following:
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$ py.test -m shard_1_of_3
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$ py.test -m shard_2_of_3
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$ py.test -m shard_3_of_3
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This code was originally adopted from the MIT-licensed ansible/molecule@9e7b79b:
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Copyright (c) 2015-2018 Cisco Systems, Inc.
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Copyright (c) 2018 Red Hat, Inc.
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"""
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mark_opt = config.getoption('-m')
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if not mark_opt.startswith('shard_'):
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return
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desired_shard, _, total_shards = mark_opt[len('shard_'):].partition('_of_')
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if not total_shards or not desired_shard:
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return
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desired_shard = int(desired_shard)
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total_shards = int(total_shards)
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if not 0 < desired_shard <= total_shards:
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raise ValueError('desired_shard must be greater than 0 and not bigger than total_shards')
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for test_counter, item in enumerate(items):
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shard = test_counter%total_shards + 1
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marker = getattr(pytest.mark, 'shard_{}_of_{}'.format(shard, total_shards))
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item.add_marker(marker)
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print('Running sharded test group #{} out of {}'.format(desired_shard, total_shards))
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