The testpagespec directive is supplied by the testpagespec plugin.

This directive allows testing a PageSpec to see if it matches a page, and to see the part that matches, or causes the match to fail.

Example uses:

[[!testpagespec  pagespec="foopage and barpage" match="foopage"]]

This will print out something like "no match: barpage does not match foopage", highlighting which part of the PageSpec is causing the match to fail.

[[!testpagespec  pagespec="foopage or !bar*" match="barpage"]]

This will print out something like "no match: bar* matches barpage", since the part of the PageSpec that fails is this negated match.

[[!testpagespec  pagespec="foopage or barpage" match="barpage"]]

This will print out something like "match: barpage matches barpage", indicating the part of the PageSpec that caused it to match.