rm dependency from arrow and fixed tests

Author: pcrespov

packages/common-library/src/common_library/error_codes.py

@@ -41,14 +41,14 @@ def _create_fingerprint(exc: BaseException) -> str:
     return hashlib.sha256(fingerprint.encode()).hexdigest()[:_LEN]
 
 
-_MILISECONDS: Final[int] = 1000
+_SECS_TO_MILISECS: Final[int] = 1000  # ms
 
 
 def _create_timestamp() -> int:
     """Timestamp as milliseconds since epoch
     NOTE: this reduces the precission to milliseconds but it is good enough for our purpose
     """
-    ts = datetime.now(UTC).timestamp() * _MILISECONDS
+    ts = datetime.now(UTC).timestamp() * _SECS_TO_MILISECS
     return int(ts)
 
 
@@ -79,5 +79,7 @@ def parse_error_code_parts(oec: ErrorCodeStr) -> tuple[str, datetime]:
         msg = f"Invalid error code format: {oec}"
         raise ValueError(msg)
     fingerprint = match.group("fingerprint")
-    timestamp = arrow.get(int(match.group("timestamp")) / _MILISECONDS).datetime
+    timestamp = datetime.fromtimestamp(
+        float(match.group("timestamp")) / _SECS_TO_MILISECS, tz=UTC
+    )
     return fingerprint, timestamp

packages/common-library/tests/test_error_codes.py

@@ -36,8 +36,8 @@ def test_exception_fingerprint_consistency():
         # emulates different runs of the same function (e.g. different sessions)
         try:
             _level_one(v)  # same even if different value!
-            time.sleep(0.1)
         except Exception as err:
+            time.sleep(1)
             error_code = create_error_code(err)
             error_codes.append(error_code)
 
@@ -51,11 +51,11 @@ def test_exception_fingerprint_consistency():
     assert fingerprints[0] == fingerprints[1]
     assert timestamps[0] < timestamps[1]
 
-    time.sleep(0.1)
     try:
         # Same function but different location
         _level_one(0)
     except Exception as e2:
+        time.sleep(1)
         error_code_2 = create_error_code(e2)
         fingerprint_2, timestamp_2 = parse_error_code_parts(error_code_2)