Make test suite compatible with PHP 7.2

[remicollet]

With PHP 7.2:

There was 1 error:
1) Doctrine\Tests\ORM\Functional\QueryCacheTest::testQueryCache_HitDoesNotSaveParserResult
count(): Parameter must be an array or an object that implements Countable
/builddir/build/BUILDROOT/php-doctrine-orm-2.5.11-1.fc28.noarch/usr/share/php/Doctrine/ORM/Query.php:306
/builddir/build/BUILDROOT/php-doctrine-orm-2.5.11-1.fc28.noarch/usr/share/php/Doctrine/ORM/AbstractQuery.php:969
/builddir/build/BUILDROOT/php-doctrine-orm-2.5.11-1.fc28.noarch/usr/share/php/Doctrine/ORM/AbstractQuery.php:924
/builddir/build/BUILDROOT/php-doctrine-orm-2.5.11-1.fc28.noarch/usr/share/php/Doctrine/ORM/AbstractQuery.php:727
/builddir/build/BUILD/doctrine2-249b737094f1e7cba4f0a8d19acf5be6cf3ed504/tests/Doctrine/Tests/ORM/Functional/QueryCacheTest.php:148

And, since 7.1

There were 4 errors:

1) Doctrine\Tests\ORM\Cache\Persister\Entity\NonStrictReadWriteCachedEntityPersisterTest::testTransactionRollBackShouldClearQueue
ReflectionException: Given object is not an instance of the class this property was declared in

/work/GIT/doctrine2/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/NonStrictReadWriteCachedEntityPersisterTest.php:40

2) Doctrine\Tests\ORM\Cache\Persister\Entity\NonStrictReadWriteCachedEntityPersisterTest::testInsertTransactionCommitShouldPutCache
ReflectionException: Given object is not an instance of the class this property was declared in

/work/GIT/doctrine2/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/NonStrictReadWriteCachedEntityPersisterTest.php:77

3) Doctrine\Tests\ORM\Cache\Persister\Entity\NonStrictReadWriteCachedEntityPersisterTest::testUpdateTransactionCommitShouldPutCache
ReflectionException: Given object is not an instance of the class this property was declared in

/work/GIT/doctrine2/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/NonStrictReadWriteCachedEntityPersisterTest.php:106

4) Doctrine\Tests\ORM\Cache\Persister\Entity\NonStrictReadWriteCachedEntityPersisterTest::testDeleteTransactionCommitShouldEvictCache
ReflectionException: Given object is not an instance of the class this property was declared in

/work/GIT/doctrine2/tests/Doctrine/Tests/ORM/Cache/Persister/Entity/NonStrictReadWriteCachedEntityPersisterTest.php:134

[remicollet]

3rd commit: apc_cache_info without paramter returns NULL with recent version.

[remicollet]

Using PHP 7.2.0RC6

$ php -d apc.enable_cli=1 -d memory_limit=1G vendor/bin/phpunit 
PHPUnit 4.8.36-1-g18e5f52 by Sebastian Bergmann and contributors.

.............................................................   61 / 3025 (  2%)
.............................................................  122 / 3025 (  4%)
.............................................................  183 / 3025 (  6%)
.............................................................  244 / 3025 (  8%)
.............................................................  305 / 3025 ( 10%)
.............................................................  366 / 3025 ( 12%)
......................................S.......SSSS.S.........  427 / 3025 ( 14%)
.............................................................  488 / 3025 ( 16%)
.............................................................  549 / 3025 ( 18%)
................................SS...........................  610 / 3025 ( 20%)
.............................................................  671 / 3025 ( 22%)
.............................................................  732 / 3025 ( 24%)
.............................................................  793 / 3025 ( 26%)
.............................................................  854 / 3025 ( 28%)
.............................................................  915 / 3025 ( 30%)
.............................................................  976 / 3025 ( 32%)
..........................S.SSSSSSSSSSSS..................... 1037 / 3025 ( 34%)
............................................................. 1098 / 3025 ( 36%)
.........................................SS.................. 1159 / 3025 ( 38%)
............S...S...........S..............................S. 1220 / 3025 ( 40%)
............................................................. 1281 / 3025 ( 42%)
..................S.......................................... 1342 / 3025 ( 44%)
............................................................. 1403 / 3025 ( 46%)
............................................................S 1464 / 3025 ( 48%)
S.....................................S...................... 1525 / 3025 ( 50%)
............................................................. 1586 / 3025 ( 52%)
............................................................. 1647 / 3025 ( 54%)
............................................................. 1708 / 3025 ( 56%)
............................................................. 1769 / 3025 ( 58%)
............................................................. 1830 / 3025 ( 60%)
............................................................. 1891 / 3025 ( 62%)
............................................................. 1952 / 3025 ( 64%)
....................S........................................ 2013 / 3025 ( 66%)
......II........................S............................ 2074 / 3025 ( 68%)
............................................................. 2135 / 3025 ( 70%)
............................................................. 2196 / 3025 ( 72%)
............................................................. 2257 / 3025 ( 74%)
............................................................. 2318 / 3025 ( 76%)
............................................................. 2379 / 3025 ( 78%)
............................................................. 2440 / 3025 ( 80%)
............................................................. 2501 / 3025 ( 82%)
............................................................. 2562 / 3025 ( 84%)
............................................................. 2623 / 3025 ( 86%)
............................................................. 2684 / 3025 ( 88%)
............................................................. 2745 / 3025 ( 90%)
............................................................. 2806 / 3025 ( 92%)
...................................................S.......S. 2867 / 3025 ( 94%)
.....S.......S.......................S............S.......... 2928 / 3025 ( 96%)
............................................................. 2989 / 3025 ( 98%)
....................................

Time: 4.59 seconds, Memory: 144.00MB

OK, but incomplete, skipped, or risky tests!
Tests: 3025, Assertions: 11321, Skipped: 39, Incomplete: 2.

[lcobucci]

Thanks @remicollet