add query oracle test

tests/test_mx_query.py

@@ -0,0 +1,30 @@
+import unittest
+
+from fxsdk.client.mx_client import MxClient
+
+grpc_cli = MxClient('localhost:9090')
+
+pair_id = 'btc:cusd'
+
+
+class TestMxClientQuery(unittest.TestCase):
+
+    def test_query_oracle_price(self):
+        price = grpc_cli.query_oracle_price(pair_id)
+        print(price)
+
+    def test_query_oracle_prices(self):
+        prices = grpc_cli.query_oracle_prices()
+        print(prices)
+
+    def test_query_oracle_market(self):
+        market = grpc_cli.query_oracle_market(pair_id)
+        print(market)
+
+    def test_query_oracle_markets(self):
+        markets = grpc_cli.query_oracle_markets()
+        print(markets)
+
+
+if __name__ == '__main__':
+    unittest.main()