def test_email
    # Check we cant create a user with an invalid e-mail address
    u = User.new
    u.password = u.password_confirmation = "Dummy001"

    # Invalid e-mail addresses
    [ "",                                           # Blank
      "example",                                    # No @ or domain
      "example@",                                   # No domain
      "example@example",                            # No dot or TLD
      "example@example.",                           # No TLD
      "@example.com",                               # No user name
      "example@example.123",                        # No TLD contains numbers
      ("a"*30) + "@" + ("b"*66) + ".com",           # Too long - 101 Characters
      "ab@cd.com",                                  # Too short - 9 Characters
      "example@@example.com",                       # Two @'s
      "example@!!!.com",                            # Invalid characters
      "example@example.!!!"                         # Invalid characters
    ].each do |s|
      u.email = s
      assert !u.save, "Save succeeded for invalid address: " + s
      assert u.errors.invalid?("email"), "Field (email) was not invalid: " + s
    end

    # Valid e-mail addresses
    [ "example@example.com",                        # Basic e-mail address
      "example@example.co.uk",                      # Test of .co.uk
      "123@123.com",                                # Numbers are ok in user and domain names
      ("a"*30) + "@" + ("b"*65) + ".com",           # Max Length - 100 Characters
      "abc@de.com"                                  # Min Length - 10 Characters
    ].each do |s|
      u.email = s
      assert u.save, "Save failed for valid address: " + s
    end
  end