Added test_leverage_settings.py

Author: Trivium0911

integration_tests/rest/test_leverage_settings.py

@@ -0,0 +1,25 @@
+import pytest
+import sys
+
+
+class TestLeverageSettings:
+
+    def test_response_corresponds_swagger_schema(self, client):
+        resp_keys = ['value', 'values']
+        lev_settings = client.get_leverage_settings(symbol='EUR/USD_LEVERAGE')
+        assert len(lev_settings) > 0
+        assert type(lev_settings) is dict
+        assert all(lev_settings[key] is not None for key
+                   in lev_settings.keys())
+        assert all(key in resp_keys for key in lev_settings)
+
+    @pytest.mark.parametrize('recv_val', [60001, sys.maxsize])
+    def test_recv_window_over_limit(self, client, recv_val):
+        with pytest.raises(ValueError):
+            client.get_leverage_settings(symbol='EUR/USD_LEVERAGE',
+                                         recv_window=recv_val)
+
+    def test_wrong_symbol(self, client):
+        lev_settings = client.get_leverage_settings(symbol="TEST123")
+        assert lev_settings['code'] == -1128 and 'Invalid symbol: ' \
+               in lev_settings['msg']