preflight checks: refactor and fix aos_version

Bring in openshift_repos to provide Origin repo before checks on Origin.

For OCP we want the check to fail if both version 3.3 and version 3.4
are available - they shouldn't have both channels enabled.
For Origin everything is in one repo so it's not surprising to find 1.4
and 1.5 versions available.

Added unit tests as well.

1 files changed, 120 insertions, 0 deletions

diff --git a/roles/openshift_health_checker/test/aos_version_test.py b/roles/openshift_health_checker/test/aos_version_test.py
new file mode 100644
index 000000000..39c86067a
--- /dev/null
+++ b/roles/openshift_health_checker/test/aos_version_test.py
@@ -0,0 +1,120 @@
+import pytest
+import aos_version
+
+from collections import namedtuple
+Package = namedtuple('Package', ['name', 'version'])
+
+expected_pkgs = set(['spam', 'eggs'])
+
+
+@pytest.mark.parametrize('pkgs, requested_release, expect_not_found', [
+    (
+        [],
+        '3.2.1',
+        expected_pkgs,  # none found
+    ),
+    (
+        [Package('spam', '3.2.1')],
+        '3.2',
+        ['eggs'],  # completely missing
+    ),
+    (
+        [Package('spam', '3.2.1'), Package('eggs', '3.3.2')],
+        '3.2',
+        ['eggs'],  # not the right version
+    ),
+    (
+        [Package('spam', '3.2.1'), Package('eggs', '3.2.1')],
+        '3.2',
+        [],  # all found
+    ),
+    (
+        [Package('spam', '3.2.1'), Package('eggs', '3.2.1.5')],
+        '3.2.1',
+        [],  # found with more specific version
+    ),
+    (
+        [Package('eggs', '1.2.3'), Package('eggs', '3.2.1.5')],
+        '3.2.1',
+        ['spam'],  # eggs found with multiple versions
+    ),
+])
+def test_check_pkgs_for_precise_version(pkgs, requested_release, expect_not_found):
+    if expect_not_found:
+        with pytest.raises(aos_version.PreciseVersionNotFound) as e:
+            aos_version._check_precise_version_found(pkgs, expected_pkgs, requested_release)
+        assert set(expect_not_found) == set(e.value.problem_pkgs)
+    else:
+        aos_version._check_precise_version_found(pkgs, expected_pkgs, requested_release)
+
+
+@pytest.mark.parametrize('pkgs, requested_release, expect_higher', [
+    (
+        [],
+        '3.2.1',
+        [],
+    ),
+    (
+        [Package('spam', '3.2.1')],
+        '3.2',
+        [],  # more precise but not strictly higher
+    ),
+    (
+        [Package('spam', '3.3')],
+        '3.2.1',
+        ['spam-3.3'],  # lower precision, but higher
+    ),
+    (
+        [Package('spam', '3.2.1'), Package('eggs', '3.3.2')],
+        '3.2',
+        ['eggs-3.3.2'],  # one too high
+    ),
+    (
+        [Package('eggs', '1.2.3'), Package('eggs', '3.2.1.5'), Package('eggs', '3.4')],
+        '3.2.1',
+        ['eggs-3.4'],  # multiple versions, one is higher
+    ),
+    (
+        [Package('eggs', '3.2.1'), Package('eggs', '3.4'), Package('eggs', '3.3')],
+        '3.2.1',
+        ['eggs-3.4'],  # multiple versions, two are higher
+    ),
+])
+def test_check_pkgs_for_greater_version(pkgs, requested_release, expect_higher):
+    if expect_higher:
+        with pytest.raises(aos_version.FoundHigherVersion) as e:
+            aos_version._check_higher_version_found(pkgs, expected_pkgs, requested_release)
+        assert set(expect_higher) == set(e.value.problem_pkgs)
+    else:
+        aos_version._check_higher_version_found(pkgs, expected_pkgs, requested_release)
+
+
+@pytest.mark.parametrize('pkgs, expect_to_flag_pkgs', [
+    (
+        [],
+        [],
+    ),
+    (
+        [Package('spam', '3.2.1')],
+        [],
+    ),
+    (
+        [Package('spam', '3.2.1'), Package('eggs', '3.2.2')],
+        [],
+    ),
+    (
+        [Package('spam', '3.2.1'), Package('spam', '3.3.2')],
+        ['spam'],
+    ),
+    (
+        [Package('eggs', '1.2.3'), Package('eggs', '3.2.1.5'), Package('eggs', '3.4')],
+        ['eggs'],
+    ),
+])
+def test_check_pkgs_for_multi_release(pkgs, expect_to_flag_pkgs):
+    if expect_to_flag_pkgs:
+        with pytest.raises(aos_version.FoundMultiRelease) as e:
+            aos_version._check_multi_minor_release(pkgs, expected_pkgs)
+        assert set(expect_to_flag_pkgs) == set(e.value.problem_pkgs)
+    else:
+        aos_version._check_multi_minor_release(pkgs, expected_pkgs)