Generic class for watch file change

tests/utils/test_file_watcher.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2016 GNS3 Technologies Inc.
+#
+# 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, either version 3 of the License, or
+# (at your option) any later version.
+#
+# 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, see <http://www.gnu.org/licenses/>.
+
+import asyncio
+from unittest.mock import MagicMock
+
+
+from gns3server.utils.file_watcher import FileWatcher
+
+
+def test_file_watcher(async_run, tmpdir):
+    file = tmpdir / "test"
+    file.write("a")
+    callback = MagicMock()
+    fw = FileWatcher(file, callback, delay=0.5)
+    async_run(asyncio.sleep(1))
+    assert not callback.called
+    file.write("b")
+    async_run(asyncio.sleep(1.5))
+    callback.assert_called_with(str(file))
+
+
+def test_file_watcher_not_existing(async_run, tmpdir):
+    file = tmpdir / "test"
+    callback = MagicMock()
+    fw = FileWatcher(file, callback, delay=0.5)
+    async_run(asyncio.sleep(1))
+    assert not callback.called
+    file.write("b")
+    async_run(asyncio.sleep(1.5))
+    callback.assert_called_with(str(file))
+