reorganize the library into three folders lib, contrib and core

Write unittests with pytest
Make all functions and method signatures as keyword only arguments

tests/unittests/test_positions.py

@@ -0,0 +1,30 @@
+import pytest
+
+from aiomql.lib.positions import Positions
+
+
+class TestPositions:
+    @pytest.fixture(scope='class', autouse=True)
+    async def init(self, make_orders):
+        await self.positions.get_positions()
+
+    @classmethod
+    def setup_class(cls):
+        cls.positions = Positions()
+
+    @pytest.mark.order(1)
+    async def test_get_positions(self):
+        await self.positions.get_positions()
+        assert len(self.positions.positions) >= 0
+
+    async def test_get_position_by_ticket(self):
+        ticket = self.positions.positions[0].ticket
+        position = await self.positions.get_position_by_ticket(ticket=ticket)
+        assert position is not None
+        assert position.ticket == ticket
+
+    async def test_get_position_by_symbol(self):
+        symbol = self.positions.positions[0].symbol
+        positions = await self.positions.get_position_by_symbol(symbol=symbol)
+        assert len(positions) >= 0
+        assert positions[0].symbol == symbol