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diff --git a/azure/aria/aria-extension-cloudify/src/aria/tests/utils/test_versions.py b/azure/aria/aria-extension-cloudify/src/aria/tests/utils/test_versions.py
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+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from aria.utils.versions import (VersionString, parse_version_string)
+
+
+def test_version_string():
+    # No qualifiers
+    assert VersionString('20') == VersionString('20')
+    assert VersionString('20') == VersionString('20.0')
+    assert VersionString('20') == VersionString('20.0.0')
+    assert VersionString('20') < VersionString('20.0.1')
+
+    # With numeric qualifiers
+    assert VersionString('20.0.1-1') < VersionString('20.0.1-2')
+    assert VersionString('20.0.1-0') < VersionString('20.0.1')
+    assert VersionString('20.0.1-1') < VersionString('20.0.1')
+
+    # With prefixed qualifiers
+    assert VersionString('20.0.1-beta1') < VersionString('20.0.1-beta2')
+    assert VersionString('20.0.1-beta1') < VersionString('20.0.1-1')
+    assert VersionString('20.0.1-beta1') < VersionString('20.0.1')
+    assert VersionString('20.0.1-beta2') < VersionString('20.0.1-rc2')
+    assert VersionString('20.0.1-alpha2') < VersionString('20.0.1-beta1')
+    assert VersionString('20.0.1-dev2') < VersionString('20.0.1-alpha1')
+    assert VersionString('20.0.1-DEV2') < VersionString('20.0.1-ALPHA1')
+
+    # Coercive comparisons
+    assert VersionString('20.0.0') == VersionString(10 * 2)
+    assert VersionString('20.0.0') == VersionString(20.0)
+
+    # Non-VersionString comparisons
+    assert VersionString('20.0.0') == 20
+    assert VersionString('20.0.0') < '20.0.1'
+
+    # Nulls
+    assert VersionString() == VersionString()
+    assert VersionString() == VersionString.NULL
+    assert VersionString(None) == VersionString.NULL
+    assert VersionString.NULL == None # pylint: disable=singleton-comparison
+    assert VersionString.NULL == 0
+
+    # Invalid version strings
+    assert VersionString('maxim is maxim') == VersionString.NULL
+    assert VersionString('20.maxim.0') == VersionString.NULL
+    assert VersionString('20.0.0-maxim1') == VersionString.NULL
+    assert VersionString('20.0.1-1.1') == VersionString.NULL
+
+    # Sorts
+    v1 = VersionString('20.0.0')
+    v2 = VersionString('20.0.1-beta1')
+    v3 = VersionString('20.0.1')
+    v4 = VersionString('20.0.2')
+    assert [v1, v2, v3, v4] == sorted([v4, v3, v2, v1], key=lambda v: v.key)
+
+    # Sets
+    v1 = VersionString('20.0.0')
+    v2 = VersionString('20.0')
+    v3 = VersionString('20')
+    assert set([v1]) == set([v1, v2, v3])
+
+    # Dicts
+    the_dict = {v1: 'test'}
+    assert the_dict.get(v2) == 'test'
+
+def test_parse_version_string():
+    # One test of each type from the groups above should be enough
+    assert parse_version_string('20') < parse_version_string('20.0.1')
+    assert parse_version_string('20.0.1-1') < parse_version_string('20.0.1-2')
+    assert parse_version_string('20.0.1-beta1') < parse_version_string('20.0.1-beta2')
+    assert parse_version_string('20.0.0') == parse_version_string(10 * 2)
+    assert parse_version_string(None) == parse_version_string(0)
+    assert parse_version_string(None) == parse_version_string('maxim is maxim')