public function test_it_returns_false_on_invalid_email_address()
 {
     $emailHelper = new Email();
     $invalidEmails = ['plainaddress', '#@%^%#$@#$@#.com', '@example.com', 'Joe Smith <*****@*****.**>', 'email.example.com', 'email@example@example.com', '*****@*****.**', '*****@*****.**', '*****@*****.**', 'あいうえお@example.com', 'email@example.com (Joe Smith)', 'email@example', '*****@*****.**', 'email@111.222.333.44444', '*****@*****.**', '*****@*****.**', '"(),:;<>[\\]@example.com', 'just"not"*****@*****.**', 'this\\ is\\"really\\"not\\\\allowed@example.com', 123456789, true, false];
     foreach ($invalidEmails as $email) {
         $this->assertFalse($emailHelper->isEmailAddressValid($email), $email . ' was considered valid.');
     }
 }
 /**
  * @param string $to
  * @return $this
  * @throws \InvalidArgumentException
  */
 public function setTo($to)
 {
     if (is_string($to) && Email::isEmailAddressValid($to)) {
         $this->to = $to;
         return $this;
     }
     throw new \InvalidArgumentException('Incorrect email address given.');
 }