public function testIsNumericArrayCheck()
{
$data = array('one');
$this->assertTrue(Set::isNumeric(array_keys($data)));
$data = array(1 => 'one');
$this->assertFalse(Set::isNumeric($data));
$data = array('one');
$this->assertFalse(Set::isNumeric($data));
$data = array('one' => 'two');
$this->assertFalse(Set::isNumeric($data));
$data = array('one' => 1);
$this->assertTrue(Set::isNumeric($data));
$data = array(0);
$this->assertTrue(Set::isNumeric($data));
$data = array('one', 'two', 'three', 'four', 'five');
$this->assertTrue(Set::isNumeric(array_keys($data)));
$data = array(1 => 'one', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five');
$this->assertTrue(Set::isNumeric(array_keys($data)));
$data = array('1' => 'one', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five');
$this->assertTrue(Set::isNumeric(array_keys($data)));
$data = array('one', 2 => 'two', 3 => 'three', 4 => 'four', 'a' => 'five');
$this->assertFalse(Set::isNumeric(array_keys($data)));
$data = array();
$this->assertNull(Set::isNumeric($data));
}