public function testValidAlphaRandom()
{
// Default is size 10
$s = new Stringizer("");
$randomString1 = $s->randomAlpha()->getString();
// Default is size 10
$this->assertEquals(10, $s->length());
// Confirm is Alpha
$this->assertEquals(true, $s->isAlpha());
$randomString2 = $s->randomAlpha()->getString();
$this->assertNotEquals($randomString1, $randomString2);
// Test non default size
$randomString2 = $s->randomAlpha(20)->getString();
$this->assertEquals(20, $s->length());
}