648 lines
19 KiB
Python
648 lines
19 KiB
Python
import warnings
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import pytest
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WARNINGS_SUMMARY_HEADER = "warnings summary"
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@pytest.fixture
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def pyfile_with_warnings(testdir, request):
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"""
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Create a test file which calls a function in a module which generates warnings.
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"""
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testdir.syspathinsert()
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test_name = request.function.__name__
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module_name = test_name.lstrip("test_") + "_module"
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testdir.makepyfile(
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**{
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module_name: """
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import warnings
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def foo():
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warnings.warn(UserWarning("user warning"))
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warnings.warn(RuntimeWarning("runtime warning"))
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return 1
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""",
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test_name: """
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import {module_name}
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def test_func():
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assert {module_name}.foo() == 1
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""".format(
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module_name=module_name
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),
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}
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)
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@pytest.mark.filterwarnings("default")
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def test_normal_flow(testdir, pyfile_with_warnings):
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"""
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Check that the warnings section is displayed.
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"""
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(
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[
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"*== %s ==*" % WARNINGS_SUMMARY_HEADER,
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"test_normal_flow.py::test_func",
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"*normal_flow_module.py:3: UserWarning: user warning",
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'* warnings.warn(UserWarning("user warning"))',
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"*normal_flow_module.py:4: RuntimeWarning: runtime warning",
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'* warnings.warn(RuntimeWarning("runtime warning"))',
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"* 1 passed, 2 warnings*",
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]
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)
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@pytest.mark.filterwarnings("always")
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def test_setup_teardown_warnings(testdir, pyfile_with_warnings):
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testdir.makepyfile(
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"""
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import warnings
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import pytest
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@pytest.fixture
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def fix():
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warnings.warn(UserWarning("warning during setup"))
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yield
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warnings.warn(UserWarning("warning during teardown"))
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def test_func(fix):
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pass
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"""
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)
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(
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[
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"*== %s ==*" % WARNINGS_SUMMARY_HEADER,
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"*test_setup_teardown_warnings.py:6: UserWarning: warning during setup",
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'*warnings.warn(UserWarning("warning during setup"))',
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"*test_setup_teardown_warnings.py:8: UserWarning: warning during teardown",
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'*warnings.warn(UserWarning("warning during teardown"))',
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"* 1 passed, 2 warnings*",
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]
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)
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@pytest.mark.parametrize("method", ["cmdline", "ini"])
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def test_as_errors(testdir, pyfile_with_warnings, method):
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args = ("-W", "error") if method == "cmdline" else ()
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if method == "ini":
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testdir.makeini(
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"""
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[pytest]
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filterwarnings=error
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"""
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)
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# Use a subprocess, since changing logging level affects other threads
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# (xdist).
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result = testdir.runpytest_subprocess(*args)
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result.stdout.fnmatch_lines(
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[
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"E UserWarning: user warning",
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"as_errors_module.py:3: UserWarning",
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"* 1 failed in *",
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]
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)
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@pytest.mark.parametrize("method", ["cmdline", "ini"])
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def test_ignore(testdir, pyfile_with_warnings, method):
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args = ("-W", "ignore") if method == "cmdline" else ()
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if method == "ini":
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testdir.makeini(
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"""
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[pytest]
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filterwarnings= ignore
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"""
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)
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result = testdir.runpytest(*args)
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result.stdout.fnmatch_lines(["* 1 passed in *"])
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assert WARNINGS_SUMMARY_HEADER not in result.stdout.str()
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@pytest.mark.filterwarnings("always")
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def test_unicode(testdir, pyfile_with_warnings):
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testdir.makepyfile(
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"""\
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import warnings
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import pytest
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@pytest.fixture
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def fix():
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warnings.warn("测试")
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yield
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def test_func(fix):
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pass
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"""
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)
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(
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[
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"*== %s ==*" % WARNINGS_SUMMARY_HEADER,
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"*test_unicode.py:7: UserWarning: \u6d4b\u8bd5*",
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"* 1 passed, 1 warnings*",
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]
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)
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def test_works_with_filterwarnings(testdir):
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"""Ensure our warnings capture does not mess with pre-installed filters (#2430)."""
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testdir.makepyfile(
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"""
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import warnings
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class MyWarning(Warning):
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pass
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warnings.filterwarnings("error", category=MyWarning)
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class TestWarnings(object):
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def test_my_warning(self):
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try:
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warnings.warn(MyWarning("warn!"))
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assert False
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except MyWarning:
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assert True
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"""
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)
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(["*== 1 passed in *"])
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@pytest.mark.parametrize("default_config", ["ini", "cmdline"])
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def test_filterwarnings_mark(testdir, default_config):
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"""
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Test ``filterwarnings`` mark works and takes precedence over command line and ini options.
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"""
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if default_config == "ini":
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testdir.makeini(
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"""
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[pytest]
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filterwarnings = always
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"""
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)
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testdir.makepyfile(
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"""
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import warnings
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import pytest
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@pytest.mark.filterwarnings('ignore::RuntimeWarning')
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def test_ignore_runtime_warning():
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warnings.warn(RuntimeWarning())
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@pytest.mark.filterwarnings('error')
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def test_warning_error():
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warnings.warn(RuntimeWarning())
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def test_show_warning():
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warnings.warn(RuntimeWarning())
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"""
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)
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result = testdir.runpytest("-W always" if default_config == "cmdline" else "")
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result.stdout.fnmatch_lines(["*= 1 failed, 2 passed, 1 warnings in *"])
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def test_non_string_warning_argument(testdir):
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"""Non-str argument passed to warning breaks pytest (#2956)"""
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testdir.makepyfile(
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"""\
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import warnings
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import pytest
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def test():
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warnings.warn(UserWarning(1, 'foo'))
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"""
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)
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result = testdir.runpytest("-W", "always")
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result.stdout.fnmatch_lines(["*= 1 passed, 1 warnings in *"])
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def test_filterwarnings_mark_registration(testdir):
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"""Ensure filterwarnings mark is registered"""
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testdir.makepyfile(
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"""
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import pytest
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@pytest.mark.filterwarnings('error')
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def test_func():
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pass
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"""
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)
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result = testdir.runpytest("--strict-markers")
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assert result.ret == 0
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@pytest.mark.filterwarnings("always")
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def test_warning_captured_hook(testdir):
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testdir.makeconftest(
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"""
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from _pytest.warnings import _issue_warning_captured
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def pytest_configure(config):
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_issue_warning_captured(UserWarning("config warning"), config.hook, stacklevel=2)
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"""
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)
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testdir.makepyfile(
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"""
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import pytest, warnings
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warnings.warn(UserWarning("collect warning"))
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@pytest.fixture
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def fix():
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warnings.warn(UserWarning("setup warning"))
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yield 1
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warnings.warn(UserWarning("teardown warning"))
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def test_func(fix):
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warnings.warn(UserWarning("call warning"))
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assert fix == 1
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"""
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)
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collected = []
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class WarningCollector:
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def pytest_warning_captured(self, warning_message, when, item):
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imge_name = item.name if item is not None else ""
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collected.append((str(warning_message.message), when, imge_name))
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result = testdir.runpytest(plugins=[WarningCollector()])
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result.stdout.fnmatch_lines(["*1 passed*"])
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expected = [
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("config warning", "config", ""),
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("collect warning", "collect", ""),
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("setup warning", "runtest", "test_func"),
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("call warning", "runtest", "test_func"),
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("teardown warning", "runtest", "test_func"),
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]
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assert collected == expected
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@pytest.mark.filterwarnings("always")
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def test_collection_warnings(testdir):
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"""
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Check that we also capture warnings issued during test collection (#3251).
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"""
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testdir.makepyfile(
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"""
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import warnings
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warnings.warn(UserWarning("collection warning"))
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def test_foo():
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pass
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"""
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)
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result = testdir.runpytest()
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result.stdout.fnmatch_lines(
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[
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"*== %s ==*" % WARNINGS_SUMMARY_HEADER,
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" *collection_warnings.py:3: UserWarning: collection warning",
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' warnings.warn(UserWarning("collection warning"))',
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"* 1 passed, 1 warnings*",
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]
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)
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@pytest.mark.filterwarnings("always")
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def test_mark_regex_escape(testdir):
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"""@pytest.mark.filterwarnings should not try to escape regex characters (#3936)"""
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testdir.makepyfile(
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r"""
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import pytest, warnings
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@pytest.mark.filterwarnings(r"ignore:some \(warning\)")
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def test_foo():
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warnings.warn(UserWarning("some (warning)"))
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"""
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)
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result = testdir.runpytest()
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assert WARNINGS_SUMMARY_HEADER not in result.stdout.str()
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@pytest.mark.filterwarnings("default")
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@pytest.mark.parametrize("ignore_pytest_warnings", ["no", "ini", "cmdline"])
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def test_hide_pytest_internal_warnings(testdir, ignore_pytest_warnings):
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"""Make sure we can ignore internal pytest warnings using a warnings filter."""
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testdir.makepyfile(
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"""
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import pytest
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import warnings
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warnings.warn(pytest.PytestWarning("some internal warning"))
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def test_bar():
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pass
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"""
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)
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if ignore_pytest_warnings == "ini":
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testdir.makeini(
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"""
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[pytest]
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filterwarnings = ignore::pytest.PytestWarning
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"""
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)
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args = (
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["-W", "ignore::pytest.PytestWarning"]
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if ignore_pytest_warnings == "cmdline"
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else []
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)
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result = testdir.runpytest(*args)
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if ignore_pytest_warnings != "no":
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assert WARNINGS_SUMMARY_HEADER not in result.stdout.str()
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else:
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result.stdout.fnmatch_lines(
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[
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"*== %s ==*" % WARNINGS_SUMMARY_HEADER,
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"*test_hide_pytest_internal_warnings.py:4: PytestWarning: some internal warning",
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"* 1 passed, 1 warnings *",
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]
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)
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@pytest.mark.parametrize("ignore_on_cmdline", [True, False])
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def test_option_precedence_cmdline_over_ini(testdir, ignore_on_cmdline):
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"""filters defined in the command-line should take precedence over filters in ini files (#3946)."""
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testdir.makeini(
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"""
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[pytest]
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filterwarnings = error
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"""
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)
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testdir.makepyfile(
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"""
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import warnings
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def test():
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warnings.warn(UserWarning('hello'))
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"""
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)
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args = ["-W", "ignore"] if ignore_on_cmdline else []
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result = testdir.runpytest(*args)
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if ignore_on_cmdline:
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result.stdout.fnmatch_lines(["* 1 passed in*"])
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else:
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result.stdout.fnmatch_lines(["* 1 failed in*"])
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def test_option_precedence_mark(testdir):
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"""Filters defined by marks should always take precedence (#3946)."""
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testdir.makeini(
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"""
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[pytest]
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filterwarnings = ignore
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"""
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)
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testdir.makepyfile(
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"""
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import pytest, warnings
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@pytest.mark.filterwarnings('error')
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def test():
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warnings.warn(UserWarning('hello'))
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"""
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)
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result = testdir.runpytest("-W", "ignore")
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result.stdout.fnmatch_lines(["* 1 failed in*"])
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class TestDeprecationWarningsByDefault:
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"""
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Note: all pytest runs are executed in a subprocess so we don't inherit warning filters
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from pytest's own test suite
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"""
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def create_file(self, testdir, mark=""):
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testdir.makepyfile(
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"""
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import pytest, warnings
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warnings.warn(DeprecationWarning("collection"))
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{mark}
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def test_foo():
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warnings.warn(PendingDeprecationWarning("test run"))
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""".format(
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mark=mark
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)
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)
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@pytest.mark.parametrize("customize_filters", [True, False])
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def test_shown_by_default(self, testdir, customize_filters):
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"""Show deprecation warnings by default, even if user has customized the warnings filters (#4013)."""
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self.create_file(testdir)
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if customize_filters:
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testdir.makeini(
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"""
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[pytest]
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filterwarnings =
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once::UserWarning
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"""
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)
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result = testdir.runpytest_subprocess()
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result.stdout.fnmatch_lines(
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[
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"*== %s ==*" % WARNINGS_SUMMARY_HEADER,
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"*test_shown_by_default.py:3: DeprecationWarning: collection",
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"*test_shown_by_default.py:7: PendingDeprecationWarning: test run",
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"* 1 passed, 2 warnings*",
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]
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)
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def test_hidden_by_ini(self, testdir):
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self.create_file(testdir)
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testdir.makeini(
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"""
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[pytest]
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filterwarnings =
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ignore::DeprecationWarning
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ignore::PendingDeprecationWarning
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"""
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)
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result = testdir.runpytest_subprocess()
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assert WARNINGS_SUMMARY_HEADER not in result.stdout.str()
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def test_hidden_by_mark(self, testdir):
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"""Should hide the deprecation warning from the function, but the warning during collection should
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be displayed normally.
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"""
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self.create_file(
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testdir,
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mark='@pytest.mark.filterwarnings("ignore::PendingDeprecationWarning")',
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)
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result = testdir.runpytest_subprocess()
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result.stdout.fnmatch_lines(
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[
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"*== %s ==*" % WARNINGS_SUMMARY_HEADER,
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"*test_hidden_by_mark.py:3: DeprecationWarning: collection",
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"* 1 passed, 1 warnings*",
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]
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)
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def test_hidden_by_cmdline(self, testdir):
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self.create_file(testdir)
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result = testdir.runpytest_subprocess(
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"-W",
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"ignore::DeprecationWarning",
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"-W",
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"ignore::PendingDeprecationWarning",
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)
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assert WARNINGS_SUMMARY_HEADER not in result.stdout.str()
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def test_hidden_by_system(self, testdir, monkeypatch):
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self.create_file(testdir)
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monkeypatch.setenv("PYTHONWARNINGS", "once::UserWarning")
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result = testdir.runpytest_subprocess()
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assert WARNINGS_SUMMARY_HEADER not in result.stdout.str()
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|
|
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@pytest.mark.parametrize("change_default", [None, "ini", "cmdline"])
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def test_removed_in_pytest4_warning_as_error(testdir, change_default):
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testdir.makepyfile(
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"""
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import warnings, pytest
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def test():
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warnings.warn(pytest.RemovedInPytest4Warning("some warning"))
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"""
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)
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if change_default == "ini":
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testdir.makeini(
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"""
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[pytest]
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filterwarnings =
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ignore::pytest.RemovedInPytest4Warning
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"""
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)
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args = (
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("-Wignore::pytest.RemovedInPytest4Warning",)
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if change_default == "cmdline"
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else ()
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)
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result = testdir.runpytest(*args)
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if change_default is None:
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result.stdout.fnmatch_lines(["* 1 failed in *"])
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else:
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assert change_default in ("ini", "cmdline")
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result.stdout.fnmatch_lines(["* 1 passed in *"])
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@pytest.mark.parametrize("change_default", [None, "ini", "cmdline"])
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def test_deprecation_warning_as_error(testdir, change_default):
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testdir.makepyfile(
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"""
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import warnings, pytest
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def test():
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warnings.warn(pytest.PytestDeprecationWarning("some warning"))
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"""
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)
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if change_default == "ini":
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testdir.makeini(
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"""
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[pytest]
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filterwarnings =
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ignore::pytest.PytestDeprecationWarning
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"""
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)
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args = (
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("-Wignore::pytest.PytestDeprecationWarning",)
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if change_default == "cmdline"
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else ()
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)
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result = testdir.runpytest(*args)
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if change_default is None:
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result.stdout.fnmatch_lines(["* 1 failed in *"])
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else:
|
|
assert change_default in ("ini", "cmdline")
|
|
result.stdout.fnmatch_lines(["* 1 passed in *"])
|
|
|
|
|
|
class TestAssertionWarnings:
|
|
@staticmethod
|
|
def assert_result_warns(result, msg):
|
|
result.stdout.fnmatch_lines(["*PytestAssertRewriteWarning: %s*" % msg])
|
|
|
|
def test_tuple_warning(self, testdir):
|
|
testdir.makepyfile(
|
|
"""
|
|
def test_foo():
|
|
assert (1,2)
|
|
"""
|
|
)
|
|
result = testdir.runpytest()
|
|
self.assert_result_warns(
|
|
result, "assertion is always true, perhaps remove parentheses?"
|
|
)
|
|
|
|
@staticmethod
|
|
def create_file(testdir, return_none):
|
|
testdir.makepyfile(
|
|
"""
|
|
def foo(return_none):
|
|
if return_none:
|
|
return None
|
|
else:
|
|
return False
|
|
|
|
def test_foo():
|
|
assert foo({return_none})
|
|
""".format(
|
|
return_none=return_none
|
|
)
|
|
)
|
|
|
|
def test_none_function_warns(self, testdir):
|
|
self.create_file(testdir, True)
|
|
result = testdir.runpytest()
|
|
self.assert_result_warns(
|
|
result, 'asserting the value None, please use "assert is None"'
|
|
)
|
|
|
|
def test_assert_is_none_no_warn(self, testdir):
|
|
testdir.makepyfile(
|
|
"""
|
|
def foo():
|
|
return None
|
|
|
|
def test_foo():
|
|
assert foo() is None
|
|
"""
|
|
)
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines(["*1 passed in*"])
|
|
|
|
def test_false_function_no_warn(self, testdir):
|
|
self.create_file(testdir, False)
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines(["*1 failed in*"])
|
|
|
|
|
|
def test_warnings_checker_twice():
|
|
"""Issue #4617"""
|
|
expectation = pytest.warns(UserWarning)
|
|
with expectation:
|
|
warnings.warn("Message A", UserWarning)
|
|
with expectation:
|
|
warnings.warn("Message B", UserWarning)
|
|
|
|
|
|
@pytest.mark.filterwarnings("always")
|
|
def test_group_warnings_by_message(testdir):
|
|
testdir.copy_example("warnings/test_group_warnings_by_message.py")
|
|
result = testdir.runpytest()
|
|
result.stdout.fnmatch_lines(
|
|
[
|
|
"test_group_warnings_by_message.py::test_foo[0]",
|
|
"test_group_warnings_by_message.py::test_foo[1]",
|
|
"test_group_warnings_by_message.py::test_foo[2]",
|
|
"test_group_warnings_by_message.py::test_foo[3]",
|
|
"test_group_warnings_by_message.py::test_foo[4]",
|
|
"test_group_warnings_by_message.py::test_bar",
|
|
]
|
|
)
|
|
warning_code = 'warnings.warn(UserWarning("foo"))'
|
|
assert warning_code in result.stdout.str()
|
|
assert result.stdout.str().count(warning_code) == 1
|