[TAP5-2047] ElementWrapper#find jQuery implementation is broken if there is no match

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.4
• Fix Version/s: 5.4
• Component/s: tapestry-core
• Labels: dom javascript jquery patch
• Assignee: Howard Lewis Ship
• Reporter: Jochen Kemnade
• Created: 08/Jan/13 14:11
• Updated: 09/Jan/13 02:49
• Resolved: 09/Jan/13 01:43

Description

When `ElementWrapper#find` is called with a selector that does not match any element, an array of two `ElementWrapper`s with `undefined` elements is returned. That happens, because the loop that turns the jquery matches into `ElementWrapper`s iterates from `0` to `matches.length -1`. That means there is one pass for `i=0` and one pass for `i=-1`, because CoffeeScript ranges can also be specified from the higher end to the lower one.