import unittest

from jobqueue import Job, ScheduleError, plan_jobs


class PlanJobsTests(unittest.TestCase):
    def test_dependencies_override_priority(self):
        jobs = [
            Job("build", priority=100, depends_on=("fetch",)),
            Job("fetch", priority=1),
        ]
        self.assertEqual(plan_jobs(jobs), ["fetch", "build"])

    def test_ready_jobs_use_priority_then_input_order(self):
        jobs = [Job("a", 2), Job("b", 5), Job("c", 2)]
        self.assertEqual(plan_jobs(jobs), ["b", "a", "c"])

    def test_unknown_dependency_is_rejected(self):
        with self.assertRaises(ScheduleError):
            plan_jobs([Job("build", depends_on=("missing",))])


if __name__ == "__main__":
    unittest.main()