/**
  * Tests PFXUtils::initNestedArrays().
  */
 public function testInitNestedArrays()
 {
     $expected = array('foo' => array('bar' => null));
     $nestedArrays = array();
     PFXUtils::initNestedArrays(array('foo', 'bar'), $nestedArrays);
     $this->assertEquals($expected, $nestedArrays);
     // We can add a key to an existing array
     $expected['bar'] = array('baz' => null);
     PFXUtils::initNestedArrays(array('bar', 'baz'), $nestedArrays);
     $this->assertEquals($expected, $nestedArrays);
     /* The addition can be done deeper, and with an arbitrary deepest
        element. */
     $expected['foo']['baz'] = array('zab' => new stdClass());
     PFXUtils::initNestedArrays(array('baz', 'zab'), $expected['foo'], new stdClass());
     /* It can also be used to initialize a single element although that's
        silly. */
     $nestedArrays = array();
     $expected = array(0 => array('foo' => 'bar', 'baz' => array(1, 2, 3)));
     PFXUtils::initNestedArrays(array(0), $nestedArrays, array('foo' => 'bar', 'baz' => array(1, 2, 3)));
     $this->assertEquals($expected, $nestedArrays);
 }