increase test coverage for client part

Author: lepture

flask_oauthlib/client.py

@@ -84,7 +84,7 @@ def __getattr__(self, key):
 _etree = None
 
 
-def get_etree():
+def get_etree():  # progm: no cover
     global _etree
     if _etree is not None:
         return _etree

tests/test_client.py

@@ -0,0 +1,20 @@
+from flask_oauthlib.client import encode_request_data, add_query
+
+
+def test_encode_request_data():
+    data, _ = encode_request_data('foo', None)
+    assert data == 'foo'
+
+    data, f = encode_request_data(None, 'json')
+    assert data == '{}'
+    assert f == 'application/json'
+
+    data, f = encode_request_data(None, 'urlencoded')
+    assert data == ''
+    assert f == 'application/x-www-form-urlencoded'
+
+
+def test_add_query():
+    assert 'path' == add_query('path', None)
+    assert 'path?foo=foo' == add_query('path', {'foo': 'foo'})
+    assert '?path&foo=foo' == add_query('?path', {'foo': 'foo'})