Add custom coverage test

discord/colour.py

@@ -26,6 +26,7 @@
 import colorsys
 import random
 import re
+from cov import test, mark
 
 from typing import TYPE_CHECKING, Optional, Tuple, Union
 
@@ -51,17 +52,22 @@ def parse_hex_number(argument: str) -> Colour:
     else:
         return Color(value=value)
 
-
+@test(5)
 def parse_rgb_number(number: str) -> int:
     if number[-1] == '%':
+        mark(0)
         value = float(number[:-1])
         if not (0 <= value <= 100):
+            mark(1)
             raise ValueError('rgb percentage can only be between 0 to 100')
+        mark(2)
         return round(255 * (value / 100))
 
     value = int(number)
     if not (0 <= value <= 255):
+        mark(3)
         raise ValueError('rgb number can only be between 0 to 255')
+    mark(4)
     return value