:update: add unittests for FileMiddleware and fix post method

link/middleware/file.py

@@ -37,7 +37,9 @@ def post(self, data):
         :type data: str
         """
 
-        with open(self.path, 'a') as f:
+        path = '{0}{1}'.format(os.sep, os.path.join(*self.path))
+
+        with open(path, 'a') as f:
             f.write(data)
 
     def put(self, data):

link/middleware/test/file.py

@@ -0,0 +1,64 @@
+# -*- coding: utf-8 -*-
+
+from b3j0f.utils.ut import UTCase
+from mock import MagicMock, patch
+from unittest import main
+
+from link.middleware.core import Middleware
+from link.middleware.file import FileMiddleware
+
+
+class TestFile(UTCase):
+    def setUp(self):
+        patcher1 = patch('link.middleware.file.os.remove')
+        patcher2 = patch('link.middleware.file.os.path.exists')
+        patcher3 = patch('link.middleware.file.open')
+
+        self.remove = patcher1.start()
+        self.exists = patcher2.start()
+        self.open = patcher3.start()
+
+        self.addCleanup(patcher1.stop)
+        self.addCleanup(patcher2.stop)
+        self.addCleanup(patcher3.stop)
+
+        self.exists.return_value = True
+
+        self.file = MagicMock()
+        self.file.__enter__ = MagicMock(return_value=self.file)
+        self.file.__exit__ = MagicMock()
+        self.file.read = MagicMock(return_value='content')
+        self.file.write = MagicMock()
+
+        self.open.return_value = self.file
+
+        self.mid = Middleware.get_middleware_by_uri('file:///path')
+
+    def test_get(self):
+        result = self.mid.get()
+
+        self.assertEqual(result, 'content')
+        self.open.assert_called_with('/path')
+        self.file.read.assert_called_with()
+
+    def test_post(self):
+        self.mid.post('data')
+
+        self.open.assert_called_with('/path', 'a')
+        self.file.write.assert_called_with('data')
+
+    def test_put(self):
+        self.mid.put('data')
+
+        self.open.assert_called_with('/path', 'w')
+        self.file.write.assert_called_with('data')
+
+    def test_delete(self):
+        self.mid.delete(None)
+
+        self.exists.assert_called_with('/path')
+        self.remove.assert_called_with('/path')
+
+
+if __name__ == '__main__':
+    main()