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Answer: How do I test the deep equality of two hash tables?

by fergal (Chaplain)
on May 22, 2005 at 09:07 UTC ( #459340=categorized answer: print w/replies, xml ) Need Help??

Q&A > hashes > How do I test the deep equality of two hash tables? - Answer contributed by fergal

Test::Deep provides deep comparisons of any data structures, including hashes. It is also capable of very advanced testing - what regular expressions do for strings, Test::Deep does for data structures.
use Test::Deep; if (eq_deeply($hash1, $hash2)) { print "they match" }

The fancy stuff comes in when you do something like

$animals = set("cat", "dog"); $people = set("john", "mary"); $a_p = set($animals, $people); print eq_deeply($structure, $a_p);
Ths is an example of testing set equality. It tests that $structure is an array with 2 elemenents (in any order) where each of those elements is an array with 2 elements, one containiing "cat" and "dog" (in any order) the other containing "john" and "mary" (in any order)

When used as part of the Test::Builder framework it gives diagnostics on where the structures differed.

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