Test your AI Agents with the all-new Agent to Agent Testing Platform.Learn More

How to use register_assert_rewrite method in Pytest

Best Python code snippet using pytest

conftest.py

Source:conftest.py

...44@pytest.fixture45def iters_factor(request):46    return int(request.config.getoption("--iters-factor"))47# enable pytest assert introspection in the helper modules48pytest.register_assert_rewrite('protosupport.v4.srv_msg')49pytest.register_assert_rewrite('protosupport.multi_protocol_functions')50pytest.register_assert_rewrite('cb_model')51pytest.register_assert_rewrite('dhcp4_scen')...

brain_pytest.py

Source:brain_pytest.py

1"""Astroid hooks for pytest."""2from __future__ import absolute_import3from astroid import MANAGER, register_module_extender4from astroid.builder import AstroidBuilder5def pytest_transform():6    return AstroidBuilder(MANAGER).string_build('''7try:8    import _pytest.mark9    import _pytest.recwarn10    import _pytest.runner11    import _pytest.python12    import _pytest.skipping13    import _pytest.assertion14except ImportError:15    pass16else:17    deprecated_call = _pytest.recwarn.deprecated_call18    warns = _pytest.recwarn.warns19    exit = _pytest.runner.exit20    fail = _pytest.runner.fail21    skip = _pytest.runner.skip22    importorskip = _pytest.runner.importorskip23    xfail = _pytest.skipping.xfail24    mark = _pytest.mark.MarkGenerator()25    raises = _pytest.python.raises26    # New in pytest 3.027    try:28        approx = _pytest.python.approx29        register_assert_rewrite = _pytest.assertion.register_assert_rewrite30    except AttributeError:31        pass32# Moved in pytest 3.033try:34    import _pytest.freeze_support35    freeze_includes = _pytest.freeze_support.freeze_includes36except ImportError:37    try:38        import _pytest.genscript39        freeze_includes = _pytest.genscript.freeze_includes40    except ImportError:41        pass42try:43    import _pytest.debugging44    set_trace = _pytest.debugging.pytestPDB().set_trace45except ImportError:46    try:47        import _pytest.pdb48        set_trace = _pytest.pdb.pytestPDB().set_trace49    except ImportError:50        pass51try:52    import _pytest.fixtures53    fixture = _pytest.fixtures.fixture54    yield_fixture = _pytest.fixtures.yield_fixture55except ImportError:56    try:57        import _pytest.python58        fixture = _pytest.python.fixture59        yield_fixture = _pytest.python.yield_fixture60    except ImportError:61        pass62''')63register_module_extender(MANAGER, 'pytest', pytest_transform)...

pytest.py

Source:pytest.py

1# PYTHON_ARGCOMPLETE_OK2"""3pytest: unit and functional testing with Python.4"""5# else we are imported6from _pytest.config import main, UsageError, cmdline, hookspec, hookimpl7from _pytest.fixtures import fixture, yield_fixture8from _pytest.assertion import register_assert_rewrite9from _pytest.freeze_support import freeze_includes10from _pytest import __version__11from _pytest.debugging import pytestPDB as __pytestPDB12from _pytest.recwarn import warns, deprecated_call13from _pytest.outcomes import fail, skip, importorskip, exit, xfail14from _pytest.mark import MARK_GEN as mark, param15from _pytest.main import Session16from _pytest.nodes import Item, Collector, File17from _pytest.fixtures import fillfixtures as _fillfuncargs18from _pytest.python import Module, Class, Instance, Function, Generator19from _pytest.python_api import approx, raises20set_trace = __pytestPDB.set_trace21__all__ = [22    "main",23    "UsageError",24    "cmdline",25    "hookspec",26    "hookimpl",27    "__version__",28    "register_assert_rewrite",29    "freeze_includes",30    "set_trace",31    "warns",32    "deprecated_call",33    "fixture",34    "yield_fixture",35    "fail",36    "skip",37    "xfail",38    "importorskip",39    "exit",40    "mark",41    "param",42    "approx",43    "_fillfuncargs",44    "Item",45    "File",46    "Collector",47    "Session",48    "Module",49    "Class",50    "Instance",51    "Function",52    "Generator",53    "raises",54]55if __name__ == "__main__":56    # if run as a script or by 'python -m pytest'57    # we trigger the below "else" condition by the following import58    import pytest59    raise SystemExit(pytest.main())60else:61    from _pytest.compat import _setup_collect_fakemodule...

__init__.py

Source:__init__.py

1import pytest2pytest.register_assert_rewrite("test.testdoubles.sshclient")3pytest.register_assert_rewrite("test.testdoubles.executor")...

Pytest Tutorial

Looking for an in-depth tutorial around pytest? LambdaTest covers the detailed pytest tutorial that has everything related to the pytest, from setting up the pytest framework to automation testing. Delve deeper into pytest testing by exploring advanced use cases like parallel testing, pytest fixtures, parameterization, executing multiple test cases from a single file, and more.

Chapters

What is pytest
Pytest installation: Want to start pytest from scratch? See how to install and configure pytest for Python automation testing.
Run first test with pytest framework: Follow this step-by-step tutorial to write and run your first pytest script.
Parallel testing with pytest: A hands-on guide to parallel testing with pytest to improve the scalability of your test automation.
Generate pytest reports: Reports make it easier to understand the results of pytest-based test runs. Learn how to generate pytest reports.
Pytest Parameterized tests: Create and run your pytest scripts while avoiding code duplication and increasing test coverage with parameterization.
Pytest Fixtures: Check out how to implement pytest fixtures for your end-to-end testing needs.
Execute Multiple Test Cases: Explore different scenarios for running multiple test cases in pytest from a single file.
Stop Test Suite after N Test Failures: See how to stop your test suite after n test failures in pytest using the @pytest.mark.incremental decorator and maxfail command-line option.