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<?php
/**
* Bug #21177 "XML_Util::collapseEmptyTags() can return NULL"
*
* PREG returns NULL when it encounters an error.
* In this case, it was encountering PREG_BACKTRACK_LIMIT_ERROR.
*
* @link https://pear.php.net/bugs/bug.php?id=21177
*/
class Bug21177Tests extends AbstractUnitTests
{
public function getTestCandidate()
{
$expected = '<id_mytest_yesorno />';
return array(
array('<idmytestyesorno></idmytestyesorno>', '<idmytestyesorno />'),
array('<idmytestyesorno />', '<idmytestyesorno />'),
array('<id_mytest_yesorno></id_mytest_yesorno>', '<id_mytest_yesorno />'),
array('<id_mytest_yesorno />', '<id_mytest_yesorno />'),
);
}
/**
* @dataProvider getTestCandidate()
*/
public function testCollapseEmptyTagsForBug21177($original, $expected)
{
$this->assertEquals($expected, XML_Util::collapseEmptyTags($original, XML_UTIL_COLLAPSE_ALL), "Failed bugcheck.");
}
}