Merge pull request #1 from moneyadviceservice/matcher

Matcher

README.md

@@ -47,6 +47,20 @@ class ValidatedClass
 end
 ```
 
+## Usage with RSpec
+
+With default attribute: :email
+
+```ruby
+  it { should validate_email_with_postcode_anywhere }
+```
+
+With custom attribute.
+
+```ruby
+  it { should validate_email_with_postcode_anywhere.on_attribute(:email) }
+```
+
 ## Contributing
 
 1. Fork it

lib/postcode_anywhere/email_validation/version.rb

@@ -1,5 +1,5 @@
 module PostcodeAnywhere
   module EmailValidation
-    VERSION = '0.0.2'
+    VERSION = '0.0.3'
   end
 end

postcodeanywhere-emailvalidation.gemspec

@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
   spec.description           = %q{Verify the existence of an email address.}
   spec.summary               = %q{Verifies the existence of an email address using the Email Validation web services from PostcodeAnywhere.}
   spec.homepage              = 'https://github.com/moneyadviceservice/postcode_anywhere-email_validation'
-  spec.date                  = "2013-06-04"
+  spec.date                  = '2013-06-04'
   spec.files                 = `git ls-files`.split($/)
   spec.executables           = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files            = spec.files.grep(%r{^(test|spec|features)/})

spec/lib/postcode_anywhere/email_validation/validator_spec.rb

@@ -28,6 +28,14 @@ module EmailValidation
         end
       end
 
+      describe 'RSpec Matcher' do
+        context 'with default attribute' do
+          it { should validate_email_with_postcode_anywhere }
+        end
+        context 'with custom attribute' do
+          it { should validate_email_with_postcode_anywhere.on_attribute(:email) }
+        end
+      end
     end
   end
 end

spec/support/matchers.rb

@@ -0,0 +1,28 @@
+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)
+  end
+
+  failure_message_for_should_not do |model|
+    failure_message(model, 'not')
+  end
+
+  def failure_message(model, option = '')
+    "#{model.class} should #{option} have 'PostcodeAnywhere::EmailValidation::Validator' on attribute #{attribute}"
+  end
+
+end