pip/tests/functional/test_new_resolver.py

import json

import pytest

from tests.lib import create_basic_wheel_for_package


def assert_installed(script, **kwargs):
    ret = script.pip('list', '--format=json')
    installed = set(
        (val['name'], val['version'])
        for val in json.loads(ret.stdout)
    )
    assert set(kwargs.items()) <= installed, \
        "{!r} not all in {!r}".format(kwargs, installed)


def assert_not_installed(script, *args):
    ret = script.pip("list", "--format=json")
    installed = set(val["name"] for val in json.loads(ret.stdout))
    # None of the given names should be listed as installed, i.e. their
    # intersection should be empty.
    assert not (set(args) & installed), \
        "{!r} contained in {!r}".format(args, installed)


def test_new_resolver_can_install(script):
    create_basic_wheel_for_package(
        script,
        "simple",
        "0.1.0",
    )
    script.pip(
        "install", "--unstable-feature=resolver",
        "--no-cache-dir", "--no-index",
        "--find-links", script.scratch_path,
        "simple"
    )
    assert_installed(script, simple="0.1.0")


def test_new_resolver_can_install_with_version(script):
    create_basic_wheel_for_package(
        script,
        "simple",
        "0.1.0",
    )
    script.pip(
        "install", "--unstable-feature=resolver",
        "--no-cache-dir", "--no-index",
        "--find-links", script.scratch_path,
        "simple==0.1.0"
    )
    assert_installed(script, simple="0.1.0")


def test_new_resolver_picks_latest_version(script):
    create_basic_wheel_for_package(
        script,
        "simple",
        "0.1.0",
    )
    create_basic_wheel_for_package(
        script,
        "simple",
        "0.2.0",
    )
    script.pip(
        "install", "--unstable-feature=resolver",
        "--no-cache-dir", "--no-index",
        "--find-links", script.scratch_path,
        "simple"
    )
    assert_installed(script, simple="0.2.0")


def test_new_resolver_installs_dependencies(script):
    create_basic_wheel_for_package(
        script,
        "base",
        "0.1.0",
        depends=["dep"],
    )
    create_basic_wheel_for_package(
        script,
        "dep",
        "0.1.0",
    )
    script.pip(
        "install", "--unstable-feature=resolver",
        "--no-cache-dir", "--no-index",
        "--find-links", script.scratch_path,
        "base"
    )
    assert_installed(script, base="0.1.0", dep="0.1.0")


def test_new_resolver_ignore_dependencies(script):
    create_basic_wheel_for_package(
        script,
        "base",
        "0.1.0",
        depends=["dep"],
    )
    create_basic_wheel_for_package(
        script,
        "dep",
        "0.1.0",
    )
    script.pip(
        "install", "--unstable-feature=resolver",
        "--no-cache-dir", "--no-index", "--no-deps",
        "--find-links", script.scratch_path,
        "base"
    )
    assert_installed(script, base="0.1.0")
    assert_not_installed(script, "dep")


def test_new_resolver_installs_extras(script):
    create_basic_wheel_for_package(
        script,
        "base",
        "0.1.0",
        extras={"add": ["dep"]},
    )
    create_basic_wheel_for_package(
        script,
        "dep",
        "0.1.0",
    )
    result = script.pip(
        "install", "--unstable-feature=resolver",
        "--no-cache-dir", "--no-index",
        "--find-links", script.scratch_path,
        "base[add,missing]",
        expect_stderr=True,
    )
    assert "WARNING: Invalid extras specified" in result.stderr, str(result)
    assert ": missing" in result.stderr, str(result)
    assert_installed(script, base="0.1.0", dep="0.1.0")


@pytest.mark.parametrize(
    "requires_python, ignore_requires_python, dep_version",
    [
        # Something impossible to satisfy.
        ("<2", False, "0.1.0"),
        ("<2", True, "0.2.0"),

        # Something guaranteed to satisfy.
        (">=2", False, "0.2.0"),
        (">=2", True, "0.2.0"),
    ],
)
def test_new_resolver_requires_python(
    script,
    requires_python,
    ignore_requires_python,
    dep_version,
):
    create_basic_wheel_for_package(
        script,
        "base",
        "0.1.0",
        depends=["dep"],
    )
    create_basic_wheel_for_package(
        script,
        "dep",
        "0.1.0",
    )
    create_basic_wheel_for_package(
        script,
        "dep",
        "0.2.0",
        requires_python=requires_python,
    )

    args = [
        "install",
        "--unstable-feature=resolver",
        "--no-cache-dir",
        "--no-index",
        "--find-links", script.scratch_path,
    ]
    if ignore_requires_python:
        args.append("--ignore-requires-python")
    args.append("base")

    script.pip(*args)

    assert_installed(script, base="0.1.0", dep=dep_version)