Add tests for string helpers too, update timestamp strings tests

Fix string helpers calls for some edge cases

src/corelibs/string_handling/string_helpers.py

@@ -2,16 +2,19 @@
 String helpers
 """
 
+from decimal import Decimal, getcontext
 from textwrap import shorten
 
 
-def shorten_string(string: str, length: int, hard_shorten: bool = False, placeholder: str = " [~]") -> str:
+def shorten_string(
+    string: str | int | float, length: int, hard_shorten: bool = False, placeholder: str = " [~]"
+) -> str:
     """
     check if entry is too long and cut it, but only for console output
     Note that if there are no spaces in the string, it will automatically use the hard split mode
 
     Args:
-        string (str): _description_
+        string (str | int | float): _description_
         length (int): _description_
         hard_shorten (bool): if shorte should be done on fixed string lenght. Default: False
         placeholder (str): placeholder string. Default: " [~]"
@@ -19,13 +22,19 @@ def shorten_string(string: str, length: int, hard_shorten: bool = False, placeho
     Returns:
         str: _description_
     """
-    length = int(length)
     string = str(string)
+    # if placeholder > lenght
     if len(string) > length:
         if hard_shorten is True or " " not in string:
+            # hard shorten error
+            if len(placeholder) > length:
+                raise ValueError(f"Cannot shorten string: placeholder {placeholder} is too large for max width")
             short_string = f"{string[:(length - len(placeholder))]}{placeholder}"
         else:
-            short_string = shorten(string, width=length, placeholder=placeholder)
+            try:
+                short_string = shorten(string, width=length, placeholder=placeholder)
+            except ValueError as e:
+                raise ValueError(f"Cannot shorten string: {e}") from e
     else:
         short_string = string
 
@@ -66,6 +75,9 @@ def format_number(number: float, precision: int = 0) -> str:
     format numbers, current trailing zeros does not work
     use {:,} or {:,.f} or {:,.<N>f} <N> = number instead of this
 
+    The upper limit of the precision depends on the value of the number itself
+    very large numbers will have no precision at all any more
+
     Arguments:
         number {float} -- _description_
 
@@ -75,12 +87,18 @@ def format_number(number: float, precision: int = 0) -> str:
     Returns:
         str -- _description_
     """
-    if precision < 0 and precision > 100:
+    if precision < 0 or precision > 100:
         precision = 0
+    if precision > 0:
+        getcontext().prec = precision
+        # make it a string to avoid mangling
+        _number = Decimal(str(number))
+    else:
+        _number = number
     return (
         "{:,."
         f"{str(precision)}"
         "f}"
-    ).format(number)
+    ).format(_number)
 
 # __END__