Change the Log event to use symbolic levels, not numbers

[schwernbot]

From: @schwern Date: Tuesday Jan 18, 2011 at 01:24 GMT Orig: https://github.com/Test-More/test-more/issues/111

Change the Log event to use symbolic levels, not numbers. This lets us insert new levels later.

It will still return an ordered list of symbolic levels which can be used to determine ordering at run time.

[schwernbot]

From: @schwern Date: Thursday Feb 03, 2011 at 07:00 GMT Orig: https://github.com/Test-More/test-more/issues/111#issuecomment-734949

Implement log level comparison via between_levels()

This is deliberately minimalist to avoid YAGNI and encourage range based level comparison.

Also: Incompatible

• The emergency and critical log levels have been removed. They didn't have a use case.

• TB2::Event::Log->levels now returns in order from lowest to highest.

  New Features

• Added TB2::Event::Log->between_levels() to compare log levels.

  Documentation

• The suggested meanings of event log levels are now documented.

Closed by 4ee7cbe9a86a1dbeb8c954fcb1e824aa3327ef5c