add unit tests for modbus

app/tests/test_modbus.py

@@ -1,7 +1,12 @@
 # test_with_pytest.py
 # import pytest, logging
 from app.src.modbus import Modbus
+from app.src.infos import Infos
 
+class TestHelper(Modbus):
+    def __init__(self):
+        super().__init__()
+        self.db = Infos()
 
 def test_modbus_crc():
     mb = Modbus()
@@ -19,3 +24,18 @@ def test_build_modbus_pdu():
     assert pdu == b'\x01\x06\x20\x00\x00\x12\x02\x07'
     assert mb.check_crc(pdu)
 
+def test_build_recv():
+    mb = TestHelper()
+    pdu = mb.build_msg(1,3,0x300e,0x2)
+    assert pdu == b'\x01\x03\x30\x0e\x00\x02\xaa\xc8'
+    assert mb.check_crc(pdu)
+    call = 0
+    for key, update in mb.recv_resp(mb.db, b'\x01\x03\x04\x01\x2c\x00\x46\xbb\xf4'):
+        if key == 'grid':
+            assert update == True
+        elif key == 'inverter':
+            assert update == True
+        else:
+            assert False
+        call += 1
+    assert 2 == call