convert_to_seconds allow negative time strings and add pytests

src/corelibs/debug_handling/debug_helpers.py

@@ -11,6 +11,7 @@ from types import TracebackType
 # _typeshed.OptExcInfo
 OptExcInfo = Tuple[None, None, None] | Tuple[Type[BaseException], BaseException, TracebackType]
 
+
 def call_stack(
     start: int = 0,
     skip_last: int = -1,

src/corelibs/iterator_handling/data_search.py

@@ -22,6 +22,7 @@ def array_search(
     """depreacted, old call order"""
     return find_in_array_from_list(data, search_params, return_index)
 
+
 def find_in_array_from_list(
     data: list[dict[str, Any]],
     search_params: list[ArraySearchList],

src/corelibs/json_handling/json_helper.py

@@ -28,6 +28,7 @@ def default(obj: Any) -> str | None:
         return obj.isoformat()
     return None
 
+
 def json_dumps(data: Any):
     """
     wrapper for json.dumps with sure dump without throwing Exceptions

src/corelibs/string_handling/timestamp_strings.py

@@ -60,6 +60,11 @@ def convert_to_seconds(time_string: str | int | float) -> int:
         return int(round(float(time_string)))
     time_string = str(time_string)
 
+    # Check if the time string is negative
+    negative = time_string.startswith('-')
+    if negative:
+        time_string = time_string[1:]  # Remove the negative sign for processing
+
     # Define time unit conversion factors
     unit_factors: dict[str, int] = {
         'Y': 31536000,       # 365 days * 86400 seconds/day
@@ -109,7 +114,7 @@ def convert_to_seconds(time_string: str | int | float) -> int:
 
         seen_units.append(unit)
 
-    return total_seconds
+    return -total_seconds if negative else total_seconds
 
 
 def seconds_to_string(seconds: str | int | float, show_microseconds: bool = False) -> str: