Property Checking

To use Property Checking, we simply include the extension and compile; before the first move, the game will produce a list of those things that are not yet described, and those rooms that do not yet have an initial appearance.

The section that writes out content occurs only in a "not for release" segment of Property Checking, so it is safe to include Property Checking in a game for release, as the messages will not appear in the final build.

To add additional checks to Property Checking, we may add our own rules to the property-check rulebook. If, for instance, we wanted to guarantee that all people in the game had an initial appearance:

A property-check rule for a person (called the target) (this is the people must have initial appearances rule):
if the initial appearance of the target is empty:
say "[target] has no initial appearance.".

Example: * Underdescribed - A minimal sort of game which will produce output with Property Checking

Version 4 of Property Checking by Emily Short begins here.

"A light testing extension to identify rooms and game items that may still be lacking descriptions or other properties."

Section 1 - Testing Properties - Not for release

When play begins (this is the run property checks at the start of play rule):
if the description of the player is "As good-looking as ever.":
say "The player has the default description.";
repeat with item running through rooms:
follow the property-check rules for item;
repeat with item running through things:
follow the property-check rules for item.

Section 2 - The Property-check Rules

The property-check rules are an object-based rulebook.

A property-check rule for a thing (called the target) (this is the things must have description rule):
unless target provides the property description:
do nothing;
if the description of target is non-empty:
do nothing;
otherwise:
say "[target] has no description.".

A property-check rule for a room (called the target) (this is the rooms must have descriptions rule):
if description of target is empty, say "[target] has no description."

Property Checking ends here.