想要使用多個CPU核心來進行測驗,可以使用 -n 引數( 或者 --numprocesses)
(使用8個核心來跑測驗用例)
pytest -n 8
使用 -n auto 引數可以利用電腦的所有核心來跑測驗用例
測驗時使用的演算法可以根據--dist命令引數定制:
--dist load(默認選項):給每個CPU核心隨機分配用例,不保證執行順序,--dist loadscope:對于測驗函式,測驗按模塊分組,對于測驗方法,測驗按類分組,每組作為一個整體分配給可用的worker,這保證了組中的所有測驗都在同一行程中運行,如果的模塊級或類級fixtures,這將非常有用,按類分組優先于按模塊分組,--dist loadfile: 測驗用例按其所在檔案分組,每組作為一個整體分配給可用的worker,這保證了檔案中的所有測驗都在同一個輔助行程中運行,--dist loadgroup: 測驗按xdist_group標記分組,每組作為一個整體分配給可用的執行器,這保證了具有相同xdist_ group名稱的所有測驗都在同一個worker中運行,
@pytest.mark.xdist_group(name="group1")
def test1():
pass
class TestA:
@pytest.mark.xdist_group("group1")
def test2():
pass-
這將確保test1和TestA::test2將在同一個worker中運行,沒有xdist_ group標記的測驗在--dist=load模式下正常運行,
--dist no:正常的pytest執行模式,一次運行一個測驗(完全沒有分發),
例子:
專案目錄結構

xdist_test.py
import logging
import pytest
class TestXdist(object):
@pytest.mark.xdist_group("group1")
def test_one(self):
logging.info("1")
assert True
@pytest.mark.xdist_group("group1")
def test_two(self):
logging.info("2")
assert True
@pytest.mark.xdist_group("group2")
def test_three(self):
logging.info("3")
assert True
@pytest.mark.xdist_group("group2")
def test_four(self):
logging.info("4")
assert True
xdist_dummy_test.py
import logging
import pytest
class TestXdist(object):
@pytest.mark.run(order=1)
@pytest.mark.xdist_group("group1")
def test_dummy_one(self):
logging.info("d1")
assert True
@pytest.mark.xdist_group("group1")
@pytest.mark.run(order=2)
def test_dummy_two(self):
logging.info("d2")
assert True
@pytest.mark.run(order=3)
@pytest.mark.xdist_group("group2")
def test_dummy_three(self):
logging.info("d3")
assert True
@pytest.mark.xdist_group("group2")
@pytest.mark.run(order=4)
def test_dummy_four(self):
logging.info("d4")
assert True
(venv) ? pytest pytest -n auto --dist loadscope
=========================================================================== test session starts ===========================================================================
platform darwin -- Python 3.8.9, pytest-7.1.2, pluggy-1.0.0
rootdir: /Users/spock/PycharmProjects/pytest, configfile: pytest.ini
plugins: xdist-2.5.0, forked-1.4.0, ordering-0.6
[gw0] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw1] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw2] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw3] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw4] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw5] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw6] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw7] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
gw0 [8] / gw1 [8] / gw2 [8] / gw3 [8] / gw4 [8] / gw5 [8] / gw6 [8] / gw7 [8]
scheduling tests via LoadScopeScheduling
test2/xdist_dummy_test.py::TestXdist::test_dummy_one
test/xdist_test.py::TestXdist::test_one
[gw0] [ 12%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_one
[gw1] [ 25%] PASSED test/xdist_test.py::TestXdist::test_one
test2/xdist_dummy_test.py::TestXdist::test_dummy_two
test/xdist_test.py::TestXdist::test_two
[gw1] [ 37%] PASSED test/xdist_test.py::TestXdist::test_two
test/xdist_test.py::TestXdist::test_three
[gw0] [ 50%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_two
test2/xdist_dummy_test.py::TestXdist::test_dummy_three
[gw1] [ 62%] PASSED test/xdist_test.py::TestXdist::test_three
test/xdist_test.py::TestXdist::test_four
[gw0] [ 75%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_three
test2/xdist_dummy_test.py::TestXdist::test_dummy_four
[gw1] [ 87%] PASSED test/xdist_test.py::TestXdist::test_four
[gw0] [100%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_four
============================================================================ 8 passed in 0.40s ============================================================================
(venv) ? pytest pytest -n auto --dist loadfile
=========================================================================== test session starts ===========================================================================
platform darwin -- Python 3.8.9, pytest-7.1.2, pluggy-1.0.0
rootdir: /Users/spock/PycharmProjects/pytest, configfile: pytest.ini
plugins: xdist-2.5.0, forked-1.4.0, ordering-0.6
[gw0] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw1] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw2] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw3] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw4] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw5] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw6] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw7] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
gw0 [8] / gw1 [8] / gw2 [8] / gw3 [8] / gw4 [8] / gw5 [8] / gw6 [8] / gw7 [8]
scheduling tests via LoadFileScheduling
test/xdist_test.py::TestXdist::test_one
test2/xdist_dummy_test.py::TestXdist::test_dummy_one
[gw1] [ 12%] PASSED test/xdist_test.py::TestXdist::test_one
[gw0] [ 25%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_one
test/xdist_test.py::TestXdist::test_two
test2/xdist_dummy_test.py::TestXdist::test_dummy_two
[gw1] [ 37%] PASSED test/xdist_test.py::TestXdist::test_two
[gw0] [ 50%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_two
test2/xdist_dummy_test.py::TestXdist::test_dummy_three
test/xdist_test.py::TestXdist::test_three
[gw1] [ 62%] PASSED test/xdist_test.py::TestXdist::test_three
[gw0] [ 75%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_three
test2/xdist_dummy_test.py::TestXdist::test_dummy_four
test/xdist_test.py::TestXdist::test_four
[gw1] [ 87%] PASSED test/xdist_test.py::TestXdist::test_four
[gw0] [100%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_four
============================================================================ 8 passed in 0.38s ============================================================================
(venv) ? pytest pytest -n auto --dist loadgroup
=========================================================================== test session starts ===========================================================================
platform darwin -- Python 3.8.9, pytest-7.1.2, pluggy-1.0.0
rootdir: /Users/spock/PycharmProjects/pytest, configfile: pytest.ini
plugins: xdist-2.5.0, forked-1.4.0, ordering-0.6
[gw0] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw1] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw2] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw3] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw4] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw5] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw6] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
[gw7] Python 3.8.9 (default, May 17 2022, 12:55:41) -- [Clang 13.1.6 (clang-1316.0.21.2.5)]
gw0 [8] / gw1 [8] / gw2 [8] / gw3 [8] / gw4 [8] / gw5 [8] / gw6 [8] / gw7 [8]
scheduling tests via LoadGroupScheduling
test2/xdist_dummy_test.py::TestXdist::test_dummy_three@group2
test2/xdist_dummy_test.py::TestXdist::test_dummy_one@group1
[gw1] [ 12%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_three@group2
test2/xdist_dummy_test.py::TestXdist::test_dummy_four@group2
[gw0] [ 25%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_one@group1
[gw1] [ 37%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_four@group2
test2/xdist_dummy_test.py::TestXdist::test_dummy_two@group1
[gw0] [ 50%] PASSED test2/xdist_dummy_test.py::TestXdist::test_dummy_two@group1
test/xdist_test.py::TestXdist::test_three@group2
[gw1] [ 62%] PASSED test/xdist_test.py::TestXdist::test_three@group2
test/xdist_test.py::TestXdist::test_four@group2
[gw1] [ 75%] PASSED test/xdist_test.py::TestXdist::test_four@group2
test/xdist_test.py::TestXdist::test_one@group1
[gw0] [ 87%] PASSED test/xdist_test.py::TestXdist::test_one@group1
test/xdist_test.py::TestXdist::test_two@group1
[gw0] [100%] PASSED test/xdist_test.py::TestXdist::test_two@group1
============================================================================ 8 passed in 0.40s ============================================================================
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