reduceTargetClassNames() public method

This method is used to optimize the matching process.
public reduceTargetClassNames ( ClassNameIndex $classNameIndex ) : ClassNameIndex
$classNameIndex Neos\Flow\Aop\Builder\ClassNameIndex
return Neos\Flow\Aop\Builder\ClassNameIndex
 /**
  * @test
  */
 public function reduceTargetClassNamesFiltersAllClassesNotMatchedByAClassNameFilterWithRegularExpressions()
 {
     $availableClassNames = ['TestPackage\\Subpackage\\Class1', 'TestPackage\\Class2', 'TestPackage\\Subpackage\\SubSubPackage\\Class3', 'TestPackage\\Subpackage2\\Class4'];
     sort($availableClassNames);
     $availableClassNamesIndex = new Aop\Builder\ClassNameIndex();
     $availableClassNamesIndex->setClassNames($availableClassNames);
     $expectedClassNames = ['TestPackage\\Subpackage\\Class1', 'TestPackage\\Subpackage\\SubSubPackage\\Class3'];
     sort($expectedClassNames);
     $expectedClassNamesIndex = new Aop\Builder\ClassNameIndex();
     $expectedClassNamesIndex->setClassNames($expectedClassNames);
     $classNameFilter = new Aop\Pointcut\PointcutClassNameFilter('TestPackage\\Subpackage\\.*');
     $result = $classNameFilter->reduceTargetClassNames($availableClassNamesIndex);
     $this->assertEquals($expectedClassNamesIndex, $result, 'The wrong class names have been filtered');
 }