RSpec matcher (validate_email_with_postcode_anywhere)

.gitignore

@@ -5,3 +5,4 @@ Gemfile.lock
 pkg
 .idea
 .DS_Store
+coverage

lib/postcode_anywhere/email_validation.rb

@@ -2,6 +2,7 @@
 require 'postcode_anywhere/email_validation/validation_error'
 require 'postcode_anywhere/email_validation/validator'
 require 'postcode_anywhere/email_validation/version'
+require 'postcode_anywhere/matchers/email_validator' if defined?(RSpec)
 
 require 'rest_client'
 

lib/postcode_anywhere/email_validation/version.rb

@@ -1,5 +1,5 @@
 module PostcodeAnywhere
   module EmailValidation
-    VERSION = '0.0.3'
+    VERSION = '0.0.4'
   end
 end

lib/postcode_anywhere/matchers/email_validator.rb

@@ -0,0 +1,30 @@
+module PostcodeAnywhere
+  module Matchers
+    RSpec::Matchers.define :validate_email_with_postcode_anywhere do
+      chain :on_attribute do |attribute|
+        @attribute = attribute
+      end
+
+      match do |model|
+        model_validators = model.class.validators_on(attribute)
+        model_validators.any? { |validator| validator.instance_of?(PostcodeAnywhere::EmailValidation::Validator) }
+      end
+
+      def attribute
+        @attribute || :email
+      end
+
+      failure_message_for_should do |model|
+        failure_message(model, 'should')
+      end
+
+      failure_message_for_should_not do |model|
+        failure_message(model, 'snould not')
+      end
+
+      def failure_message(model, should_or_should_not)
+        "#{model.class} #{should_or_should_not} have 'PostcodeAnywhere::EmailValidation::Validator' on attribute #{attribute}"
+      end
+    end
+  end
+end

spec/lib/postcode_anywhere/matchers/email_validator_spec.rb

@@ -0,0 +1,24 @@
+require 'spec_helper'
+
+module PostcodeAnywhere::EmailValidation
+
+  describe 'Validator Matcher' do
+
+    context 'when Validator is defined' do
+      subject { ::ValidatedClass.new }
+
+      it { should validate_email_with_postcode_anywhere }
+
+      it { should validate_email_with_postcode_anywhere.on_attribute(:email) }
+
+      it { should_not validate_email_with_postcode_anywhere.on_attribute(:email_address) }
+    end
+
+    context 'when Validator is not defined' do
+      subject { ::NotValidatedClass.new }
+
+      it { should_not validate_email_with_postcode_anywhere }
+    end
+
+  end
+end

spec/support/not_validated_class.rb

@@ -0,0 +1,4 @@
+class NotValidatedClass
+  include ActiveModel::Validations
+end
+