fixes #2 – client method upload_file won't work

tests/res/test.txt

@@ -0,0 +1 @@
+test content for testing of webdav client

tests/test_client.py

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+from unittest import TestCase
+
+from webdav2.client import Client
+
+
+class ClientTestCase(TestCase):
+    def setUp(self):
+        options = {
+            'webdav_hostname': 'https://webdav.yandex.ru',
+            'webdav_login': 'webdavclient.test',
+            'webdav_password': 'Qwerty123!'
+        }
+        self.client = Client(options)
+
+    def test_list(self):
+        file_list = self.client.list()
+        self.assertIsNotNone(file_list, 'List of files should not be None')
+        self.assertGreater(file_list.__len__(), 0, 'Expected that amount of files more then 0')
+
+    def test_upload_file(self):
+        remote_path = 'test.txt'
+        local_path = './res/test.txt'
+        if self.client.check(remote_path=remote_path):
+            self.client.clean(remote_path=remote_path)
+        self.client.upload_file(remote_path=remote_path, local_path=local_path)
+        self.assertTrue(self.client.check(remote_path=remote_path))