email validator tests, live coding later error message

test/validators/answer_format_validator_test.rb

@@ -144,7 +144,7 @@ class AnswerFormatValidatorTest < ActiveSupport::TestCase
     obj.answer = { "later" => "" }
 
     refute obj.valid?
-    assert_match(/write.*code/, obj.errors.messages[:answer][0])
+    assert_match(/come back/, obj.errors.messages[:answer][0])
   end
 
   test "live_code should FAIL without values" do

test/validators/email_format_validator_test.rb

@@ -0,0 +1,41 @@
+require 'test_helper'
+
+class EmailValidatable
+  include ActiveModel::Validations
+  attr_accessor :email
+  validates :email, email_format: true
+end
+
+class EmailFormatValidatorTest < ActiveSupport::TestCase
+  test "tld length" do
+    obj = EmailValidatable.new
+
+    obj.email = "me@no.yes.x"
+    refute obj.valid?, 'allowed single length tld'
+
+    obj.email = "me@no.yes.co"
+    assert obj.valid?, 'did not allow tld length 2'
+
+    obj.email = "me@no.yes.com"
+    assert obj.valid?, 'did not allow tld length 3'
+
+    obj.email = "me@no.yes.commets"
+    assert obj.valid?, 'did not allow tld length > 3'
+  end
+
+  test "can handle comma seperated addresses" do
+    obj = EmailValidatable.new
+    obj.email = "me@no.yes, me@yes.no"
+
+    assert obj.valid?, 'did not allow multiple address [comma seperated]'
+  end
+
+  test "provides proper error message" do
+    obj = EmailValidatable.new
+    obj.email = "this is a bad email address"
+    obj.valid?
+
+    refute obj.errors.messages.empty?, 'needs an error message'
+    assert_match(/not formatted properly/, obj.errors.messages[:email].join)
+  end
+end