Test improving Rez context resolve failure messsage

mem_test2.py

import os
from rez.resolved_context import ResolvedContext
from rez.package_repository import package_repository_manager


os.environ["REZ_PACKAGES_PATH"] = "memory@any"


class Repo(object):
    def __init__(self):
        self._repo = package_repository_manager.get_repository("memory@any")

    def add(self, name, **kwargs):
        version = kwargs.get("version", "_NO_VERSION")
        if name not in self._repo.data:
            self._repo.data[name] = dict()
        self._repo.data[name].update({
            version: dict(name=name, **kwargs)
        })


def test_conflict():
    repo = Repo()
    repo.add("bar", version="1", requires=["dep==2"])
    repo.add("foo", version="1", requires=["dep==1"])
    repo.add("dep", version="1")
    repo.add("dep", version="2")

    context = ResolvedContext(["foo", "bar"])
    context.print_info()


def test_conflict_pipeline():
    repo = Repo()
    repo.add("pipeline", version="1", requires=["maya-2018+<=2020"])
    repo.add("maya", version="2020", requires=["pymel"])
    repo.add("pymel", version="2", requires=["python-2"])
    repo.add("houdini", version="18", requires=["python-3"])
    repo.add("python", version="2")
    repo.add("python", version="3")

    context = ResolvedContext(["pipeline", "maya", "houdini-18"])
    context.print_info()


def test_big_cycle():
    repo = Repo()
    repo.add("pipeline", version="0", requires=["nuke-10"])
    repo.add("nuke", version="10", requires=["cycle", "python==3"])
    repo.add("python", version="3")
    repo.add("cycle", version="1", requires=["bigger"])
    repo.add("bigger", version="5", requires=["nuke"])

    context = ResolvedContext(["pipeline", "cycle"])
    context.print_info()


if __name__ == "__main__":
    # test_conflict()
    # test_conflict_pipeline()
    test_big_cycle()