fixup! Add a utility to compare TickInfo objects approximately

Author: llucax

tests/timeseries/_resampling/wall_clock_timer/util.py

@@ -131,19 +131,23 @@ def __eq__(self, actual: object) -> bool:
         return abs(diff) <= self.abs
 
 
+# We need to rewrite most of the attributes in these classes to use approximate
+# comparisons. This means if a new field is added, we need to update the
+# approx_tick_info function below to handle the new fields. To catch this, we do
+# a sanity check here, so if new fields are added we get an early warning instead of
+# getting tests errors because of some rounding error in a newly added field.
 assert set(ClocksInfo.__dataclass_fields__.keys()) == {
     "monotonic_requested_sleep",
     "monotonic_time",
     "wall_clock_time",
     "monotonic_elapsed",
     "wall_clock_elapsed",
     "wall_clock_factor",
-}, "ClocksInfo fields have changed, please update the approx_tick_info function."
-
+}, "ClocksInfo fields were added or removed, please update the approx_tick_info function."
 assert set(TickInfo.__dataclass_fields__.keys()) == {
     "expected_tick_time",
     "sleep_infos",
-}
+}, "TickInfo fields were added or removed, please update the approx_tick_info function."
 
 
 def approx_tick_info(