1 files changed, 86 insertions, 0 deletions
diff --git a/tests/ga/test_env.py b/tests/ga/test_env.py
new file mode 100644
index 0000000..06e9a64
--- /dev/null
+++ b/tests/ga/test_env.py
@@ -0,0 +1,86 @@
+# Copyright 2014 Microsoft Corporation
+#
+# Licensed 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.
+#
+# Requires Python 2.4+ and Openssl 1.0+
+#
+import glob
+import tempfile
+
+import os
+from mock import patch
+
+from azurelinuxagent.common.utils import fileutil
+from azurelinuxagent.ga.env import MAXIMUM_CACHED_FILES, EnvHandler
+from tests.tools import AgentTestCase
+
+
+class TestEnv(AgentTestCase):
+    @patch("azurelinuxagent.common.conf.get_lib_dir")
+    def test_purge_disk_cache(self, mock_conf, *args):
+        names = [
+            ("Prod", "agentsManifest"),
+            ("Test", "agentsManifest"),
+            ("FauxExtension1", "manifest.xml"),
+            ("FauxExtension2", "manifest.xml"),
+            ("GoalState", "xml"),
+            ("ExtensionsConfig", "xml")
+        ]
+
+        env = EnvHandler()
+
+        tmp_dir = tempfile.mkdtemp()
+        mock_conf.return_value = tmp_dir
+
+        # write incarnations 1-100
+        for t in names:
+            self._create_files(tmp_dir,
+                               t[0],
+                               t[1],
+                               2 * MAXIMUM_CACHED_FILES,
+                               with_sleep=0.001)
+
+        # update incarnation 1 with the latest timestamp
+        for t in names:
+            f = os.path.join(tmp_dir, '.'.join((t[0], '1', t[1])))
+            fileutil.write_file(f, "faux content")
+
+        # ensure the expected number of files are created
+        for t in names:
+            p = os.path.join(tmp_dir, '{0}.*.{1}'.format(*t))
+            self.assertEqual(2 * MAXIMUM_CACHED_FILES, len(glob.glob(p)))
+
+        env.purge_disk_cache()
+
+        # ensure the expected number of files remain
+        for t in names:
+            p = os.path.join(tmp_dir, '{0}.*.{1}'.format(*t))
+            incarnation1 = os.path.join(tmp_dir, '{0}.1.{1}'.format(t[0], t[1]))
+            incarnation2 = os.path.join(tmp_dir, '{0}.2.{1}'.format(t[0], t[1]))
+            self.assertEqual(MAXIMUM_CACHED_FILES, len(glob.glob(p)))
+            self.assertTrue(os.path.exists(incarnation1))
+            self.assertFalse(os.path.exists(incarnation2))
+
+        # write incarnation 101
+        for t in names:
+            f = os.path.join(tmp_dir, '.'.join((t[0], '101', t[1])))
+            fileutil.write_file(f, "faux content")
+
+        # call to purge should be ignored, since interval has not elapsed
+        env.purge_disk_cache()
+
+        for t in names:
+            p = os.path.join(tmp_dir, '{0}.*.{1}'.format(*t))
+            incarnation1 = os.path.join(tmp_dir, '{0}.1.{1}'.format(t[0], t[1]))
+            self.assertEqual(MAXIMUM_CACHED_FILES + 1, len(glob.glob(p)))
+            self.assertTrue(os.path.exists(incarnation1))