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import operator
from pip._vendor.packaging.requirements import Requirement
from pip._vendor.resolvelib.resolvers import Criterion, RequirementInformation
from pip._vendor.resolvelib.structs import IteratorMapping
from pip._internal.models.candidate import InstallationCandidate
from pip._internal.models.link import Link
from pip._internal.req.req_install import InstallRequirement
from pip._internal.resolution.resolvelib.provider import PipProvider
from pip._internal.resolution.resolvelib.requirements import SpecifierRequirement
def build_package_criterion(provider, name, parent):
install_requirement = InstallRequirement(
Requirement(name), "-r requirements.txt (line 1)"
)
matches = provider.find_matches(
identifier=name,
requirements={name: iter([SpecifierRequirement(install_requirement)])},
incompatibilities={name: iter([])},
)
requirement_information = RequirementInformation(
requirement=SpecifierRequirement(install_requirement), parent=parent
)
return Criterion(iter(matches), [requirement_information], [])
def test_provider_known_depths(factory):
# Root requirement is specified by the user
# therefore has an infered depth of 1
root_requirement_name = "my-package"
provider = PipProvider(
factory=factory,
constraints={},
ignore_dependencies=False,
upgrade_strategy="to-satisfy-only",
user_requested={root_requirement_name: 0},
)
root_requirement_criteron = build_package_criterion(
provider=provider, name=root_requirement_name, parent=None
)
provider.get_preference(
identifier=root_requirement_name,
resolutions={},
candidates={},
information=IteratorMapping(
{root_requirement_name: root_requirement_criteron},
operator.attrgetter("information"),
),
)
assert provider._known_depths == {root_requirement_name: 1.0}
# Transative requirement is a dependency of root requirement
# theforefore has an infered depth of 2
root_package_candidate = InstallationCandidate(
root_requirement_name,
"1.0",
Link("https://{root_requirement_name}.com"),
)
transative_requirement_name = "my-transitive-package"
transative_package_criterion = build_package_criterion(
provider=provider,
name=transative_requirement_name,
parent=root_package_candidate,
)
provider.get_preference(
identifier=transative_requirement_name,
resolutions={},
candidates={},
information=IteratorMapping(
{
root_requirement_name: root_requirement_criteron,
transative_requirement_name: transative_package_criterion,
},
operator.attrgetter("information"),
),
)
assert provider._known_depths == {
transative_requirement_name: 2.0,
root_requirement_name: 1.0,
}
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