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A comment on HippyVM. Parent comment

Re:HippyVM by TazeTSchnitzel on Friday June 06, 2014 @10:01PM (#7861025)
Looks like they've copied some of PHP's tests, yes. But being able to run run-tests.php and being compatible aren't quite the same thing, really. It's how many tests pass that count.

Technical side-note: /Zend there appears to be just the tests for the Zend engine (i.e. from PHP's /Zend/tests), while the containing directory contains test folders copied from other parts of PHP (like the standard library)

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Re:HippyVM by Twirrim on Saturday June 07, 2014 @09:42PM (#7863700)
It's also worth noting that not even PHP itself passes their own test suite. At the time of writing http://gcov.php.net/viewer.php?version=PHP_5_5 states:

Overview of PHP_5_5

Build Status: OK Last Build Time: 2 days

Compile Warnings: 611 Code Coverage: 0.3% Test Failures: 78 Expected Test Failures: 42 Valgrind Reports: 44

The "Expected Test Failures" is fascinating. http://gcov.php.net/viewer.php?version=PHP_5_5&func=expected...

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Re:HippyVM by TazeTSchnitzel on Saturday June 07, 2014 @09:46PM (#7863710)
That's true, but PHP still passes the vast majority of its tests.
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