pip/tests/functional/test_install_reqs.py

import json
import os
import textwrap
from pathlib import Path
from typing import TYPE_CHECKING, Any

import pytest

from tests.lib import (
    PipTestEnvironment,
    ResolverVariant,
    TestData,
    _create_test_package_with_subdirectory,
    create_basic_sdist_for_package,
    create_basic_wheel_for_package,
    need_svn,
    requirements_file,
)
from tests.lib.local_repos import local_checkout

if TYPE_CHECKING:
    from typing import Protocol
else:
    Protocol = object


class ArgRecordingSdist:
    def __init__(self, sdist_path: Path, args_path: Path) -> None:
        self.sdist_path = sdist_path
        self._args_path = args_path

    def args(self) -> Any:
        return json.loads(self._args_path.read_text())


class ArgRecordingSdistMaker(Protocol):
    def __call__(self, name: str, **kwargs: Any) -> ArgRecordingSdist:
        ...


@pytest.fixture()
def arg_recording_sdist_maker(
    script: PipTestEnvironment,
) -> ArgRecordingSdistMaker:
    arg_writing_setup_py_prelude = textwrap.dedent(
        """
        import io
        import json
        import os
        import sys

        args_path = os.path.join(os.environ["OUTPUT_DIR"], "{name}.json")
        with open(args_path, 'w') as f:
            json.dump(sys.argv, f)
        """
    )
    output_dir = script.scratch_path.joinpath("args_recording_sdist_maker_output")
    output_dir.mkdir(parents=True)
    script.environ["OUTPUT_DIR"] = str(output_dir)

    def _arg_recording_sdist_maker(
        name: str,
        **kwargs: Any,
    ) -> ArgRecordingSdist:
        sdist_path = create_basic_sdist_for_package(
            script,
            name,
            "0.1.0",
            setup_py_prelude=arg_writing_setup_py_prelude.format(name=name),
            **kwargs,
        )
        args_path = output_dir / f"{name}.json"
        return ArgRecordingSdist(sdist_path, args_path)

    return _arg_recording_sdist_maker


@pytest.mark.network
def test_requirements_file(script: PipTestEnvironment) -> None:
    """
    Test installing from a requirements file.

    """
    other_lib_name, other_lib_version = "peppercorn", "0.6"
    script.scratch_path.joinpath("initools-req.txt").write_text(
        textwrap.dedent(
            f"""\
        INITools==0.2
        # and something else to test out:
        {other_lib_name}<={other_lib_version}
        """
        )
    )
    result = script.pip("install", "-r", script.scratch_path / "initools-req.txt")
    result.did_create(script.site_packages / "INITools-0.2.dist-info")
    result.did_create(script.site_packages / "initools")
    assert result.files_created[script.site_packages / other_lib_name].dir
    fn = f"{other_lib_name}-{other_lib_version}.dist-info"
    assert result.files_created[script.site_packages / fn].dir


def test_schema_check_in_requirements_file(script: PipTestEnvironment) -> None:
    """
    Test installing from a requirements file with an invalid vcs schema..

    """
    script.scratch_path.joinpath("file-egg-req.txt").write_text(
        "\n{}\n".format(
            "git://github.com/alex/django-fixture-generator.git"
            "#egg=fixture_generator"
        )
    )

    with pytest.raises(AssertionError):
        script.pip("install", "-vvv", "-r", script.scratch_path / "file-egg-req.txt")


@pytest.mark.parametrize(
    "test_type,editable",
    [
        ("rel_path", False),
        ("rel_path", True),
        ("rel_url", False),
        ("rel_url", True),
        ("embedded_rel_path", False),
        ("embedded_rel_path", True),
    ],
)
def test_relative_requirements_file(
    script: PipTestEnvironment, data: TestData, test_type: str, editable: bool
) -> None:
    """
    Test installing from a requirements file with a relative path. For path
    URLs, use an egg= definition.

    """
    dist_info_folder = script.site_packages / "FSPkg-0.1.dev0.dist-info"
    egg_link_file = script.site_packages / "FSPkg.egg-link"
    package_folder = script.site_packages / "fspkg"

    # Compute relative install path to FSPkg from scratch path.
    full_rel_path = os.path.relpath(
        data.packages.joinpath("FSPkg"), script.scratch_path
    )
    full_rel_url = "file:" + full_rel_path + "#egg=FSPkg"
    embedded_rel_path = script.scratch_path.joinpath(full_rel_path)

    req_path = {
        "rel_path": full_rel_path,
        "rel_url": full_rel_url,
        "embedded_rel_path": os.fspath(embedded_rel_path),
    }[test_type]

    req_path = req_path.replace(os.path.sep, "/")
    # Install as either editable or not.
    if not editable:
        with requirements_file(req_path + "\n", script.scratch_path) as reqs_file:
            result = script.pip(
                "install", "-vvv", "-r", reqs_file.name, cwd=script.scratch_path
            )
            result.did_create(dist_info_folder)
            result.did_create(package_folder)
    else:
        with requirements_file(
            "-e " + req_path + "\n", script.scratch_path
        ) as reqs_file:
            result = script.pip(
                "install", "-vvv", "-r", reqs_file.name, cwd=script.scratch_path
            )
            result.did_create(egg_link_file)


@pytest.mark.xfail
@pytest.mark.network
@need_svn
def test_multiple_requirements_files(script: PipTestEnvironment, tmpdir: Path) -> None:
    """
    Test installing from multiple nested requirements files.

    """
    other_lib_name, other_lib_version = "six", "1.16.0"
    script.scratch_path.joinpath("initools-req.txt").write_text(
        textwrap.dedent(
            """
            -e {}@10#egg=INITools
            -r {}-req.txt
        """
        ).format(
            local_checkout("svn+http://svn.colorstudy.com/INITools", tmpdir),
            other_lib_name,
        ),
    )
    script.scratch_path.joinpath(f"{other_lib_name}-req.txt").write_text(
        f"{other_lib_name}<={other_lib_version}"
    )
    result = script.pip("install", "-r", script.scratch_path / "initools-req.txt")
    assert result.files_created[script.site_packages / other_lib_name].dir
    fn = f"{other_lib_name}-{other_lib_version}.dist-info"
    assert result.files_created[script.site_packages / fn].dir
    result.did_create(script.venv / "src" / "initools")


def test_package_in_constraints_and_dependencies(
    script: PipTestEnvironment, data: TestData
) -> None:
    script.scratch_path.joinpath("constraints.txt").write_text(
        "TopoRequires2==0.0.1\nTopoRequires==0.0.1"
    )
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "constraints.txt",
        "TopoRequires2",
    )
    assert "installed TopoRequires-0.0.1" in result.stdout


def test_multiple_constraints_files(script: PipTestEnvironment, data: TestData) -> None:
    script.scratch_path.joinpath("outer.txt").write_text("-c inner.txt")
    script.scratch_path.joinpath("inner.txt").write_text("Upper==1.0")
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "outer.txt",
        "Upper",
    )
    assert "installed Upper-1.0" in result.stdout


# FIXME: Unclear what this guarantee is for.
def test_respect_order_in_requirements_file(
    script: PipTestEnvironment, data: TestData
) -> None:
    script.scratch_path.joinpath("frameworks-req.txt").write_text(
        textwrap.dedent(
            """\
        parent
        child
        simple
        """
        )
    )

    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-r",
        script.scratch_path / "frameworks-req.txt",
    )

    downloaded = [line for line in result.stdout.split("\n") if "Processing" in line]

    assert (
        "parent" in downloaded[0]
    ), f'First download should be "parent" but was "{downloaded[0]}"'
    assert (
        "child" in downloaded[1]
    ), f'Second download should be "child" but was "{downloaded[1]}"'
    assert (
        "simple" in downloaded[2]
    ), f'Third download should be "simple" but was "{downloaded[2]}"'


def test_install_local_editable_with_extras(
    script: PipTestEnvironment, data: TestData
) -> None:
    to_install = data.packages.joinpath("LocalExtras")
    res = script.pip_install_local(
        "-e", f"{to_install}[bar]", allow_stderr_warning=True
    )
    res.did_update(script.site_packages / "easy-install.pth")
    res.did_create(script.site_packages / "LocalExtras.egg-link")
    res.did_create(script.site_packages / "simple")


def test_install_collected_dependencies_first(script: PipTestEnvironment) -> None:
    result = script.pip_install_local(
        "toporequires2",
    )
    text = [line for line in result.stdout.split("\n") if "Installing" in line][0]
    assert text.endswith("toporequires2")


@pytest.mark.network
def test_install_local_editable_with_subdirectory(script: PipTestEnvironment) -> None:
    version_pkg_path = _create_test_package_with_subdirectory(script, "version_subdir")
    result = script.pip(
        "install",
        "-e",
        "{uri}#egg=version_subpkg&subdirectory=version_subdir".format(
            uri=f"git+{version_pkg_path.as_uri()}",
        ),
    )

    result.assert_installed("version-subpkg", sub_dir="version_subdir")


@pytest.mark.network
def test_install_local_with_subdirectory(script: PipTestEnvironment) -> None:
    version_pkg_path = _create_test_package_with_subdirectory(script, "version_subdir")
    result = script.pip(
        "install",
        "{uri}#egg=version_subpkg&subdirectory=version_subdir".format(
            uri=f"git+{version_pkg_path.as_uri()}",
        ),
    )

    result.assert_installed("version_subpkg.py", editable=False)


@pytest.mark.usefixtures("enable_user_site")
def test_wheel_user_with_prefix_in_pydistutils_cfg(
    script: PipTestEnvironment, data: TestData
) -> None:
    if os.name == "posix":
        user_filename = ".pydistutils.cfg"
    else:
        user_filename = "pydistutils.cfg"
    user_cfg = os.path.join(os.path.expanduser("~"), user_filename)
    script.scratch_path.joinpath("bin").mkdir()
    with open(user_cfg, "w") as cfg:
        cfg.write(
            textwrap.dedent(
                f"""
            [install]
            prefix={script.scratch_path}"""
            )
        )

    result = script.pip(
        "install", "--user", "--no-index", "-f", data.find_links, "requiresupper"
    )
    # Check that we are really installing a wheel
    assert "installed requiresupper" in result.stdout


def test_constraints_not_installed_by_default(
    script: PipTestEnvironment, data: TestData
) -> None:
    script.scratch_path.joinpath("c.txt").write_text("requiresupper")
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "c.txt",
        "Upper",
    )
    assert "requiresupper" not in result.stdout


def test_constraints_only_causes_error(
    script: PipTestEnvironment, data: TestData
) -> None:
    script.scratch_path.joinpath("c.txt").write_text("requiresupper")
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "c.txt",
        expect_error=True,
    )
    assert "installed requiresupper" not in result.stdout


def test_constraints_local_editable_install_causes_error(
    script: PipTestEnvironment,
    data: TestData,
    resolver_variant: ResolverVariant,
) -> None:
    script.scratch_path.joinpath("constraints.txt").write_text("singlemodule==0.0.0")
    to_install = data.src.joinpath("singlemodule")
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "constraints.txt",
        "-e",
        to_install,
        expect_error=True,
    )
    # Because singlemodule only has 0.0.1 available.
    assert "Cannot install singlemodule 0.0.1" in result.stderr, str(result)


@pytest.mark.network
def test_constraints_local_editable_install_pep518(
    script: PipTestEnvironment, data: TestData
) -> None:
    to_install = data.src.joinpath("pep518-3.0")

    script.pip("download", "setuptools", "wheel", "-d", data.packages)
    script.pip("install", "--no-index", "-f", data.find_links, "-e", to_install)


def test_constraints_local_install_causes_error(
    script: PipTestEnvironment,
    data: TestData,
    resolver_variant: ResolverVariant,
) -> None:
    script.scratch_path.joinpath("constraints.txt").write_text("singlemodule==0.0.0")
    to_install = data.src.joinpath("singlemodule")
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "constraints.txt",
        to_install,
        expect_error=True,
    )
    # Because singlemodule only has 0.0.1 available.
    assert "Cannot install singlemodule 0.0.1" in result.stderr, str(result)


def test_constraints_constrain_to_local_editable(
    script: PipTestEnvironment,
    data: TestData,
    resolver_variant: ResolverVariant,
) -> None:
    to_install = data.src.joinpath("singlemodule")
    script.scratch_path.joinpath("constraints.txt").write_text(
        f"-e {to_install.as_uri()}#egg=singlemodule"
    )
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "constraints.txt",
        "singlemodule",
        allow_stderr_warning=True,
        expect_error=(resolver_variant == "resolvelib"),
    )
    if resolver_variant == "resolvelib":
        assert "Editable requirements are not allowed as constraints" in result.stderr
    else:
        assert "Running setup.py develop for singlemodule" in result.stdout


def test_constraints_constrain_to_local(
    script: PipTestEnvironment, data: TestData, resolver_variant: ResolverVariant
) -> None:
    to_install = data.src.joinpath("singlemodule")
    script.scratch_path.joinpath("constraints.txt").write_text(
        f"{to_install.as_uri()}#egg=singlemodule"
    )
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "constraints.txt",
        "singlemodule",
        allow_stderr_warning=True,
    )
    assert "Building wheel for singlemodule" in result.stdout


def test_constrained_to_url_install_same_url(
    script: PipTestEnvironment, data: TestData
) -> None:
    to_install = data.src.joinpath("singlemodule")
    constraints = f"{to_install.as_uri()}#egg=singlemodule"
    script.scratch_path.joinpath("constraints.txt").write_text(constraints)
    result = script.pip(
        "install",
        "--no-index",
        "-f",
        data.find_links,
        "-c",
        script.scratch_path / "constraints.txt",
        to_install,
        allow_stderr_warning=True,
    )
    assert "Building wheel for singlemodule" in result.stdout, str(result)


def test_double_install_spurious_hash_mismatch(
    script: PipTestEnvironment, tmpdir: Path, data: TestData
) -> None:
    """Make sure installing the same hashed sdist twice doesn't throw hash
    mismatch errors.

    Really, this is a test that we disable reads from the wheel cache in
    hash-checking mode. Locally, implicitly built wheels of sdists obviously
    have different hashes from the original archives. Comparing against those
    causes spurious mismatch errors.

    """
    # Install wheel package, otherwise, it won't try to build wheels.
    with requirements_file(
        "simple==1.0 --hash=sha256:393043e672415891885c9a2a"
        "0929b1af95fb866d6ca016b42d2e6ce53619b653",
        tmpdir,
    ) as reqs_file:
        # Install a package (and build its wheel):
        result = script.pip_install_local(
            "--find-links",
            data.find_links,
            "-r",
            reqs_file.resolve(),
        )
        assert "Successfully installed simple-1.0" in str(result)

        # Uninstall it:
        script.pip("uninstall", "-y", "simple")

        # Then install it again. We should not hit a hash mismatch, and the
        # package should install happily.
        result = script.pip_install_local(
            "--find-links",
            data.find_links,
            "-r",
            reqs_file.resolve(),
        )
        assert "Successfully installed simple-1.0" in str(result)


def test_install_with_extras_from_constraints(
    script: PipTestEnvironment, data: TestData, resolver_variant: ResolverVariant
) -> None:
    to_install = data.packages.joinpath("LocalExtras")
    script.scratch_path.joinpath("constraints.txt").write_text(
        f"{to_install.as_uri()}#egg=LocalExtras[bar]"
    )
    result = script.pip_install_local(
        "-c",
        script.scratch_path / "constraints.txt",
        "LocalExtras",
        allow_stderr_warning=True,
        expect_error=(resolver_variant == "resolvelib"),
    )
    if resolver_variant == "resolvelib":
        assert "Constraints cannot have extras" in result.stderr
    else:
        result.did_create(script.site_packages / "simple")


def test_install_with_extras_from_install(script: PipTestEnvironment) -> None:
    create_basic_wheel_for_package(
        script,
        name="LocalExtras",
        version="0.0.1",
        extras={"bar": ["simple"], "baz": ["singlemodule"]},
    )
    script.scratch_path.joinpath("constraints.txt").write_text("LocalExtras")
    result = script.pip_install_local(
        "--find-links",
        script.scratch_path,
        "-c",
        script.scratch_path / "constraints.txt",
        "LocalExtras[baz]",
    )
    result.did_create(script.site_packages / "singlemodule.py")


def test_install_with_extras_joined(
    script: PipTestEnvironment, data: TestData, resolver_variant: ResolverVariant
) -> None:
    to_install = data.packages.joinpath("LocalExtras")
    script.scratch_path.joinpath("constraints.txt").write_text(
        f"{to_install.as_uri()}#egg=LocalExtras[bar]"
    )
    result = script.pip_install_local(
        "-c",
        script.scratch_path / "constraints.txt",
        "LocalExtras[baz]",
        allow_stderr_warning=True,
        expect_error=(resolver_variant == "resolvelib"),
    )
    if resolver_variant == "resolvelib":
        assert "Constraints cannot have extras" in result.stderr
    else:
        result.did_create(script.site_packages / "simple")
        result.did_create(script.site_packages / "singlemodule.py")


def test_install_with_extras_editable_joined(
    script: PipTestEnvironment, data: TestData, resolver_variant: ResolverVariant
) -> None:
    to_install = data.packages.joinpath("LocalExtras")
    script.scratch_path.joinpath("constraints.txt").write_text(
        f"-e {to_install.as_uri()}#egg=LocalExtras[bar]"
    )
    result = script.pip_install_local(
        "-c",
        script.scratch_path / "constraints.txt",
        "LocalExtras[baz]",
        allow_stderr_warning=True,
        expect_error=(resolver_variant == "resolvelib"),
    )
    if resolver_variant == "resolvelib":
        assert "Editable requirements are not allowed as constraints" in result.stderr
    else:
        result.did_create(script.site_packages / "simple")
        result.did_create(script.site_packages / "singlemodule.py")


def test_install_distribution_full_union(
    script: PipTestEnvironment, data: TestData
) -> None:
    to_install = data.packages.joinpath("LocalExtras")
    result = script.pip_install_local(
        to_install, f"{to_install}[bar]", f"{to_install}[baz]"
    )
    assert "Building wheel for LocalExtras" in result.stdout
    result.did_create(script.site_packages / "simple")
    result.did_create(script.site_packages / "singlemodule.py")


def test_install_distribution_duplicate_extras(
    script: PipTestEnvironment, data: TestData
) -> None:
    to_install = data.packages.joinpath("LocalExtras")
    package_name = f"{to_install}[bar]"
    with pytest.raises(AssertionError):
        result = script.pip_install_local(package_name, package_name)
        expected = f"Double requirement given: {package_name}"
        assert expected in result.stderr


def test_install_distribution_union_with_constraints(
    script: PipTestEnvironment,
    data: TestData,
    resolver_variant: ResolverVariant,
) -> None:
    to_install = data.packages.joinpath("LocalExtras")
    script.scratch_path.joinpath("constraints.txt").write_text(f"{to_install}[bar]")
    result = script.pip_install_local(
        "-c",
        script.scratch_path / "constraints.txt",
        f"{to_install}[baz]",
        allow_stderr_warning=True,
        expect_error=(resolver_variant == "resolvelib"),
    )
    if resolver_variant == "resolvelib":
        msg = "Unnamed requirements are not allowed as constraints"
        assert msg in result.stderr
    else:
        assert "Building wheel for LocalExtras" in result.stdout
        result.did_create(script.site_packages / "singlemodule.py")


def test_install_distribution_union_with_versions(
    script: PipTestEnvironment,
    data: TestData,
    resolver_variant: ResolverVariant,
) -> None:
    to_install_001 = data.packages.joinpath("LocalExtras")
    to_install_002 = data.packages.joinpath("LocalExtras-0.0.2")
    result = script.pip_install_local(
        f"{to_install_001}[bar]",
        f"{to_install_002}[baz]",
        expect_error=(resolver_variant == "resolvelib"),
    )
    if resolver_variant == "resolvelib":
        assert "Cannot install localextras[bar]" in result.stderr
        assert ("localextras[bar] 0.0.1 depends on localextras 0.0.1") in result.stdout
        assert ("localextras[baz] 0.0.2 depends on localextras 0.0.2") in result.stdout
    else:
        assert (
            "Successfully installed LocalExtras-0.0.1 simple-3.0 singlemodule-0.0.1"
        ) in result.stdout


@pytest.mark.xfail
def test_install_distribution_union_conflicting_extras(
    script: PipTestEnvironment, data: TestData
) -> None:
    # LocalExtras requires simple==1.0, LocalExtras[bar] requires simple==2.0;
    # without a resolver, pip does not detect the conflict between simple==1.0
    # and simple==2.0. Once a resolver is added, this conflict should be
    # detected.
    to_install = data.packages.joinpath("LocalExtras-0.0.2")
    result = script.pip_install_local(
        to_install, f"{to_install}[bar]", expect_error=True
    )
    assert "installed" not in result.stdout
    assert "Conflict" in result.stderr


def test_install_unsupported_wheel_link_with_marker(script: PipTestEnvironment) -> None:
    script.scratch_path.joinpath("with-marker.txt").write_text(
        textwrap.dedent(
            """\
            {url}; {req}
        """
        ).format(
            url="https://github.com/a/b/c/asdf-1.5.2-cp27-none-xyz.whl",
            req='sys_platform == "xyz"',
        )
    )
    result = script.pip("install", "-r", script.scratch_path / "with-marker.txt")

    assert (
        "Ignoring asdf: markers 'sys_platform == \"xyz\"' don't match "
        "your environment"
    ) in result.stdout
    assert len(result.files_created) == 0


def test_install_unsupported_wheel_file(
    script: PipTestEnvironment, data: TestData
) -> None:
    # Trying to install a local wheel with an incompatible version/type
    # should fail.
    path = data.packages.joinpath("simple.dist-0.1-py1-none-invalid.whl")
    script.scratch_path.joinpath("wheel-file.txt").write_text(f"{path}\n")
    result = script.pip(
        "install",
        "-r",
        script.scratch_path / "wheel-file.txt",
        expect_error=True,
        expect_stderr=True,
    )
    assert (
        "simple.dist-0.1-py1-none-invalid.whl is not a supported wheel on this platform"
        in result.stderr
    )
    assert len(result.files_created) == 0


def test_config_settings_local_to_package(
    script: PipTestEnvironment,
    common_wheels: Path,
    arg_recording_sdist_maker: ArgRecordingSdistMaker,
) -> None:
    pyproject_toml = textwrap.dedent(
        """
        [build-system]
        requires = ["setuptools"]
        build-backend = "setuptools.build_meta"
        """
    )
    simple0_sdist = arg_recording_sdist_maker(
        "simple0",
        extra_files={"pyproject.toml": pyproject_toml},
        depends=["foo"],
    )
    foo_sdist = arg_recording_sdist_maker(
        "foo",
        extra_files={"pyproject.toml": pyproject_toml},
    )
    simple1_sdist = arg_recording_sdist_maker(
        "simple1",
        extra_files={"pyproject.toml": pyproject_toml},
        depends=["bar"],
    )
    bar_sdist = arg_recording_sdist_maker(
        "bar",
        extra_files={"pyproject.toml": pyproject_toml},
        depends=["simple3"],
    )
    simple3_sdist = arg_recording_sdist_maker(
        "simple3", extra_files={"pyproject.toml": pyproject_toml}
    )
    simple2_sdist = arg_recording_sdist_maker(
        "simple2",
        extra_files={"pyproject.toml": pyproject_toml},
    )

    reqs_file = script.scratch_path.joinpath("reqs.txt")
    reqs_file.write_text(
        textwrap.dedent(
            """
            simple0 --config-settings "--build-option=--verbose"
            foo --config-settings "--build-option=--quiet"
            simple1 --config-settings "--build-option=--verbose"
            simple2
            """
        )
    )

    script.pip(
        "install",
        "--no-index",
        "-f",
        script.scratch_path,
        "-f",
        common_wheels,
        "-r",
        reqs_file,
    )

    simple0_args = simple0_sdist.args()
    assert "--verbose" in simple0_args
    foo_args = foo_sdist.args()
    assert "--quiet" in foo_args
    simple1_args = simple1_sdist.args()
    assert "--verbose" in simple1_args
    bar_args = bar_sdist.args()
    assert "--verbose" not in bar_args
    simple3_args = simple3_sdist.args()
    assert "--verbose" not in simple3_args
    simple2_args = simple2_sdist.args()
    assert "--verbose" not in simple2_args