cibuildwheel/test/test_pep518.py

import textwrap

from . import test_projects, utils

basic_project = test_projects.new_c_project(
    setup_py_add=textwrap.dedent(
        """
        # Will fail if PEP 518 does work
        import requests
        assert requests.__version__ == "2.23.0", "Requests found but wrong version ({0})".format(requests.__version__)

        # Just making sure environment is still set
        import os
        if os.environ.get("CIBUILDWHEEL", "0") != "1":
            raise Exception("CIBUILDWHEEL environment variable is not set to 1")
        """
    )
)

basic_project.files[
    "pyproject.toml"
] = """
[build-system]
requires = [
    "setuptools >= 42",
    "setuptools_scm[toml]>=4.1.2",
    "wheel",
    "requests==2.23.0"
]

build-backend = "setuptools.build_meta"
"""


def test_pep518(tmp_path, build_frontend_env):

    project_dir = tmp_path / "project"
    basic_project.generate(project_dir)

    # build the wheels
    actual_wheels = utils.cibuildwheel_run(project_dir, add_env=build_frontend_env)

    # check that the expected wheels are produced
    expected_wheels = utils.expected_wheels("spam", "0.1.0")
    assert set(actual_wheels) == set(expected_wheels)

    # These checks ensure an extra file is not created when using custom
    # workaround; see https://github.com/pypa/cibuildwheel/issues/421
    assert not (project_dir / "42").exists()
    assert not (project_dir / "4.1.2").exists()

    # pypa/build creates a "build" folder & a "*.egg-info" folder for the wheel being built,
    # this should be harmless so remove them
    contents = [
        item
        for item in project_dir.iterdir()
        if item.name != "build" and not item.name.endswith(".egg-info")
    ]

    assert len(contents) == len(basic_project.files)