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"""
rally-openstack package should not be aligned to one constant version of Rally
framework. It means that some workarounds for compatibility stuff are
provided.
This module should contain historical notes and checks to do not forget remove
these workaround.
"""

import pkg_resources

from tests.unit import test


class WorkaroundTestCase(test.TestCase):

    WORKAROUNDS = []

    def get_min_required_version(self):
        package = pkg_resources.get_distribution("rally-openstack")
        requirement = [p for p in package.requires() if p.name == "rally"][0]

        for statement, version in requirement.specs:
            version = [int(i) for i in version.split(".")]
            if statement == ">=":
                return version
            elif statement == ">":
                version[-1] += 1
                return version
        self.skipTest("Failed to get a minimum required version of Rally "
                      "framework.")

    def test_rally_version(self):
        rally_version = self.get_min_required_version()

        for version, workarounds in self.WORKAROUNDS:
            if rally_version >= version:
                self.fail(
                    "After bumping minimum required version of Rally, some "
                    "workarounds become redundant. See the following list and "
                    "update the code: \n\t%s" % "\n\t".join(workarounds))