Inconsistency between has [attribute] selector and attr() method

[jitter]

While checking on #7480 I noted a related bug.

There are inconsistencies when using the has [attr] selector and the attr() method.
The selector doesn't return all elements which have the attribute although upon checking with the attr() method it returns a value.

​test case with text attribute not explicitly defined
​test case with text attribute explicitly defined on some elements

[snover]

This is something on the roadmap for 1.5. .attr will be rewritten along with Sizzle to stop matching on the DOM properties, so this will all be happily consistent again.

You will probably also notice here that the first test case will behave differently in IE6/7 because they run through Sizzle.

[john]

This is getting moved to 1.6 for when the $.attr happens.

[Timmy Willison]

I think #7128, #5930, and #5637 are duplicates of this issue, but I'm not 100% on that.

[Timmy Willison]

The nodes in question do not have content attributes called "text" and therefore should not be found by either one. ​http://jsfiddle.net/timmywil/znVBU/2/