Improve Com class, continue writing test

biogascontrollerapp/lib/com.py

@@ -1,10 +1,11 @@
+from abc import ABC, abstractmethod
 from typing import Optional
 import serial
 import struct
 import serial.tools.list_ports
 
 
-class Com:
+class ComSuperClass(ABC):
     def __init__(self, baudrate: int = 19200, filters: Optional[list[str]] = None) -> None:
         self._serial: Optional[serial.Serial] = None
         self._filters = filters if filters != None else [ 'USB-Serial Controller', 'Prolific USB-Serial Controller' ]
@@ -19,6 +20,32 @@ class Com:
     def get_error(self) -> serial.SerialException | None:
         return self._err
 
+    @abstractmethod
+    def get_comport(self) -> str:
+        pass
+
+    @abstractmethod
+    def connect(self) -> bool:
+        pass
+
+    @abstractmethod
+    def close(self) -> None:
+        pass
+
+    @abstractmethod
+    def receive(self, byte_count: int) -> bytes:
+        pass
+
+    @abstractmethod
+    def send(self, msg: str) -> None:
+        pass
+
+    @abstractmethod
+    def send_float(self, msg: float) -> None:
+        pass
+
+
+class Com(ComSuperClass):
     def _connection_check(self) -> bool:
         if self._serial == None:
             return self._open()