public function testMixedReferrersMapping($class)
{
$all = $class->mappings['allReferrers'];
$this->assertEquals('mixedreferrers', $all['type']);
$this->assertEquals('allReferrers', $all['fieldName']);
$this->assertNull($all['referenceType']);
$hard = $class->mappings['hardReferrers'];
$this->assertEquals('mixedreferrers', $hard['type']);
$this->assertEquals('hardReferrers', $hard['fieldName']);
$this->assertEquals('hard', $hard['referenceType']);
$weak = $class->mappings['weakReferrers'];
$this->assertEquals('mixedreferrers', $weak['type']);
$this->assertEquals('weakReferrers', $weak['fieldName']);
$this->assertEquals('weak', $weak['referenceType']);
}