KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use pytest_assertrepr_compare method in Pytest

Best Python code snippet using pytest

__init__.py

Source:__init__.py

...96          to protect later % formatting.97        The result can be formatted by util.format_explanation() for98        pretty printing.99        """100        hook_result = item.ihook.pytest_assertrepr_compare(101            config=item.config, op=op, left=left, right=right102        )103        for new_expl in hook_result:104            if new_expl:105                new_expl = truncate.truncate_if_required(new_expl, item)106                new_expl = [line.replace("\n", "\\n") for line in new_expl]107                res = six.text_type("\n~").join(new_expl)108                if item.config.getvalue("assertmode") == "rewrite":109                    res = res.replace("%", "%%")110                return res111    util._reprcompare = callbinrepr112def pytest_runtest_teardown(item):113    util._reprcompare = None114def pytest_sessionfinish(session):...

test_plugin.py

Source:test_plugin.py

...46        }),47        'urls': int48    })49    _ = expected == TEST_DATA50    msgs = pytest_assertrepr_compare('==', expected, TEST_DATA)51    assert S(Unordered([52        "failed due to validation error(s):",53        "- info.platform: not a valid value (actual: 'unix')",54        "- info.description: length of value must be at most 10 (actual: 'lorem ipsum lorem ipsum')",55        "- info.downloads: expected list (actual: {'last_month': 0})",56        "- info.classifiers: expected dict (actual: ['Development Status :: 6 - Mature', 'Intended Audience :: Developers'])",57        "- urls: expected int (actual: [{}, {}])",58        Any(59            "- releases: extra keys not allowed (actual: {'3.0.7': [], '3.1.3': []})",60            "- releases: extra keys not allowed (actual: {'3.1.3': [], '3.0.7': []})",61        ),62    ])) == msgs63    # TODO: How to assert the actual output?64    # assert expected == resp.json()65    # from _pytest.capture import capfd66    # out, err = capfd.readouterr()67    # assert out == \68    #     "assert failed due to validation error(s):\n"69    #     "- info.platform: not a valid value\n"70    #     "- info.description: length of value must be at most 10\n"71    #     "- info.downloads: expected list\n"72    #     "- info.classifiers: expected dict\n"73    #     "- urls: expected int\n"74    #     "- releases: extra keys not allowed"75    # ]76def test_unordered():77    actual = ["foobar", "barbaz", "baz"]78    expected = S(Unordered(["foo", "bar", "baz"]))79    _ = expected == actual80    msgs = pytest_assertrepr_compare('==', expected, actual)81    assert S(Unordered([82        "failed due to validation error(s):",83        "- Element #0 (foobar) is not valid against any validator",84        "- Element #1 (barbaz) is not valid against any validator",85    ])) == msgs86def test_list_error_reporting():87    # OK: List of objects88    sch = S({'foo': [int]})89    data = {'foo': ['a', 'b']}90    assert (sch == data) is False91    assert len(sch.error.errors) == 292    assert sch.error.errors[0].path == ['foo', 0]93    assert sch.error.errors[1].path == ['foo', 1]94    msgs = pytest_assertrepr_compare('==', sch, data)95    assert msgs == [96        "failed due to validation error(s):",97        "- foo.0: expected int (actual: 'a')",98        "- foo.1: expected int (actual: 'b')"99    ]100    sch = S({'foo': [{'id': int}]})101    data = {'foo': [{'id': 'bar'}, {'id': 'bar2'}]}102    assert (sch == data) is False103    assert len(sch.error.errors) == 1  # XXX: Until https://github.com/alecthomas/voluptuous/pull/330 gets merged104    assert sch.error.errors[0].path == ['foo', 0, 'id']105    msgs = pytest_assertrepr_compare('==', sch, data)106    assert msgs == [107        "failed due to validation error(s):",108        "- foo.0.id: expected int (actual: 'bar')"...

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.