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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright © 2014,2015 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import unittest
import random
import imp
python_find_deps = imp.load_source('python_find_deps', 'python.find_deps')
from pkg_resources import parse_requirements, parse_version
def reverse(xs):
return xs[::-1]
class ConflictDetectionTests(unittest.TestCase):
def setUp(self):
reqs = ['a == 0.1', 'a == 0.2']
self.test_requirements = parse_requirements(reqs)
def run_conflict_test(self, requirements, expected_conflicts):
names = set([r.project_name for r in requirements])
with self.assertRaises(python_find_deps.ConflictError) as cm:
python_find_deps.resolve_specs(requirements)
for name in names:
_exps = [(op, parse_version(v)) for (op, v)
in expected_conflicts[name]]
self.assertEqual(cm.exception.specs, _exps)
def run_conflict_test_reversed(self, requirements, expected_conflicts):
# First reverse conflicts to get them in the right order
reversed_expected_conflicts = {k: reverse(v) for (k, v)
in expected_conflicts.iteritems()}
self.run_conflict_test(reverse(requirements),
reversed_expected_conflicts)
def run_no_conflict_test(self, requirements, expected_specs):
print python_find_deps.resolve_specs(requirements)
names = set([r.project_name for r in requirements])
for name in names:
_exps = set([(op, parse_version(v)) for (op, v)
in expected_specs[name]])
_specs = python_find_deps.resolve_specs(requirements)[name]
self.assertEqual(_specs, _exps)
def test_eqs_eqs(self):
requirements = list(parse_requirements(['a == 0.1', 'a == 0.2']))
expected_conflicts = {'a': [('==', '0.1'), ('==', '0.2')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
def test_eqs_nt_eq(self):
# == x conflicts with != x
requirements = list(parse_requirements(['a == 0.1', 'a != 0.1']))
expected_conflicts = {'a': [('==', '0.1'), ('!=', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
def test_eqs_lt(self):
# == x conflicts with < y if x >= y
requirements = list(parse_requirements(['a == 0.2', 'a < 0.1']))
expected_conflicts = {'a': [('==', '0.2'), ('<', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
requirements = list(parse_requirements(['a == 0.1', 'a < 0.1']))
expected_conflicts = {'a': [('==', '0.1'), ('<', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
def test_eqs_gt(self):
# == x conflicts with > y if x <= y
requirements = list(parse_requirements(['a == 0.1', 'a > 0.1']))
expected_conflicts = {'a': [('==', '0.1'), ('>', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
requirements = list(parse_requirements(['a == 0.1', 'a > 0.2']))
expected_conflicts = {'a': [('==', '0.1'), ('>', '0.2')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
def test_eqs_lte(self):
# == x conflicts with <= y if x > y
requirements = list(parse_requirements(['a == 0.2', 'a <= 0.1']))
expected_conflicts = {'a': [('==', '0.2'), ('<=', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
requirements = list(parse_requirements(['a == 0.1', 'a <= 0.1'])) # no conflict
expected_specs = {'a': set([('==', '0.1'), ('<=', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_eq_gte(self):
# == x conflicts with >= y if x < y
requirements = list(parse_requirements(['a == 0.1', 'a >= 0.2']))
expected_conflicts = {'a': [('==', '0.1'), ('>=', '0.2')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
requirements = list(parse_requirements(['a == 0.1', 'a >= 0.1']))
expected_specs = {'a': set([('==', '0.1'), ('>=', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_lt_lt(self):
# < x < y never conflicts
requirements = list(parse_requirements(['a < 0.1', 'a < 0.1']))
expected_specs = {'a': set([('<', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
requirements = list(parse_requirements(['a < 0.1', 'a < 0.2']))
expected_specs = {'a': set([('<', '0.1'), ('<', '0.2')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_lt_gt(self):
# < x conflicts with > y if x <= y
requirements = list(parse_requirements(['a < 0.1', 'a > 0.1']))
expected_conflicts = {'a': [('<', '0.1'), ('>', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
requirements = list(parse_requirements(['a < 0.1', 'a > 0.2']))
expected_conflicts = {'a': [('<', '0.1'), ('>', '0.2')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
def test_lt_lte(self):
# < x <= y never conflicts
requirements = list(parse_requirements(['a < 0.1', 'a <= 0.1']))
expected_specs = {'a': set([('<', '0.1'), ('<=', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
requirements = list(parse_requirements(['a < 0.1', 'a <= 0.2']))
expected_specs = {'a': set([('<', '0.1'), ('<=', '0.2')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_lt_gte(self):
# < x conflicts with >= y if x <= y
requirements = list(parse_requirements(['a < 0.1', 'a >= 0.1']))
expected_conflicts = {'a': [('<', '0.1'), ('>=', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
requirements = list(parse_requirements(['a < 0.1', 'a >= 0.2']))
expected_conflicts = {'a': [('<', '0.1'), ('>=', '0.2')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
def test_gt_gt(self):
# > x > y never conflicts
requirements = list(parse_requirements(['a > 0.1', 'a > 0.1']))
expected_specs = {'a': set([('>', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
requirements = list(parse_requirements(['a > 0.1', 'a > 0.2']))
expected_specs = {'a': set([('>', '0.1'), ('>', '0.2')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_gt_lte(self):
# > x conflicts with <= y if x >= y
requirements = list(parse_requirements(['a > 0.1', 'a <= 0.1']))
expected_conflicts = {'a': [('>', '0.1'), ('<=', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
requirements = list(parse_requirements(['a > 0.2', 'a <= 0.1']))
expected_conflicts = {'a': [('>', '0.2'), ('<=', '0.1')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
def test_gt_gte(self):
# > x >= y never conflicts
requirements = list(parse_requirements(['a > 0.1', 'a >= 0.1']))
expected_specs = {'a': set([('>', '0.1'), ('>=', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
requirements = list(parse_requirements(['a > 0.1', 'a >= 0.2']))
expected_specs = {'a': set([('>', '0.1'), ('>=', '0.2')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_lte_lte(self):
# <= x <= y never conflicts
requirements = list(parse_requirements(['a <= 0.1', 'a <= 0.1']))
expected_specs = {'a': set([('<=', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
requirements = list(parse_requirements(['a <= 0.1', 'a <= 0.2']))
expected_specs = {'a': set([('<=', '0.1'), ('<=', '0.2')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_lte_gte(self):
# <= x conflicts with >= y if x < y
# note that if x == y, then the two specs don't add any constraint
requirements = list(parse_requirements(['a <= 0.1', 'a >= 0.1']))
expected_specs= {'a': set([('<=', '0.1'), ('>=', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
requirements = list(parse_requirements(['a <= 0.1', 'a >= 0.2']))
expected_conflicts = {'a': [('<=', '0.1'), ('>=', '0.2')]}
self.run_conflict_test(requirements, expected_conflicts)
self.run_conflict_test_reversed(requirements, expected_conflicts)
def test_gte_gte(self):
# >= x >= y never conflicts
requirements = list(parse_requirements(['a >= 0.1', 'a >= 0.1']))
expected_specs = {'a': set([('>=', '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
requirements = list(parse_requirements(['a >= 0.1', 'a >= 0.2']))
expected_specs = {'a': set([('>=', '0.1'), ('>=', '0.2')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_ne(self):
# != can only conflict with == (which is tested above)
for s in ['<', '>', '<=', '>=']:
requirements = list(parse_requirements(['a != 0.1', 'a %s 0.1' % s]))
expected_specs = {'a': set([('!=', '0.1'), ('%s' % s, '0.1')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
requirements = list(parse_requirements(['a != 0.1', 'a %s 0.2' % s]))
expected_specs = {'a': set([('!=', '0.1'), ('%s' % s, '0.2')])}
self.run_no_conflict_test(requirements, expected_specs)
self.run_no_conflict_test(reverse(requirements), expected_specs)
def test_unmatched(self):
# Run all permutations, fail if we get an UnmatchedException
# or something else we weren't expecting
comparitors = ['==', '!=', '<', '>', '<=', '>=']
vs = [('0.1', '0.1'), ('0.1', '0.2'),
('%s' % random.randint(0, 100), '%s' % random.randint(0, 100))]
for (vx, vy) in vs:
for cmpx in comparitors:
for cmpy in comparitors:
requirements = parse_requirements(['a %s %s' % (cmpx, vx),
'a %s %s' % (cmpy, vy)])
try:
python_find_deps.resolve_specs(requirements)
except python_find_deps.ConflictError:
pass
except python_find_deps.UnmatchedException as e:
self.fail('Got UnmatchedException: %s' % e)
except Exception as e:
self.fail('Got some other unexpected Exception: %s' % e)
def test_cause_unmatched(self):
requirements_specs = list(parse_requirements(['a == 0.1', 'a == 0.1']))
# replace our parsed specs with invalid specs
# specifically, specs with invalid operators
#
# note, one spec won't do, we're validating the specs logically
# not syntactically; we assume the specs themselves have been parsed
# by pkg_resources which will do the validation for us.
#
# so we need two specs to force a check for a conflict,
# an UnmatchedError should occur if neither of the specs
# contain an operator recognised by the conflict detector
# e.g. '===', which is undefined in a spec
requirements_specs[0].specs = [('===', '0.1')]
requirements_specs[1].specs = [('===', '0.1')]
with self.assertRaises(python_find_deps.UnmatchedError):
specs = python_find_deps.resolve_specs(requirements_specs)
def test_distinct_requirements_no_conflict(self):
requirements = list(parse_requirements(['a == 0.1', 'b == 0.1']))
specs = python_find_deps.resolve_specs(requirements)
expected_specs = {'a': set([('==', parse_version('0.1'))]),
'b': set([('==', parse_version('0.1'))])}
self.assertEqual(specs, expected_specs)
if __name__ == '__main__':
unittest.main(verbosity=2)
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