Merge pull request #64 from akestner/ak-rspec-matcher

Adds RSpec Matcher

lib/rspec_matcher.rb

@@ -0,0 +1,12 @@
+RSpec::Matchers.define :validate_url_of do |attribute|
+  match do
+    actual = subject.is_a?(Class) ? subject.new : subject
+    actual.send(:"#{attribute}=", "htp://invalidurl")
+    expect(actual).to be_invalid
+    @expected_message ||= I18n.t("errors.messages.url")
+    expect(actual.errors.messages[attribute.to_sym]).to include(@expected_message)
+  end
+  chain :with_message do |message|
+    @expected_message = message
+  end
+end

spec/resources/user_with_custom_scheme.rb

@@ -3,5 +3,5 @@ class UserWithCustomScheme
 
   attr_accessor :homepage
 
-  validates :homepage, url { schemes: ['ftp'] }
+  validates :homepage, url: { schemes: ['ftp'] }
 end

spec/rspec_matcher_spec.rb

@@ -0,0 +1,13 @@
+require "spec_helper"
+
+if defined?(ActiveModel)
+  require_relative "../lib/rspec_matcher"
+
+  describe "RSpec matcher" do
+    subject { User }
+
+    it "should ensure that attributes are validated" do
+      should validate_url_of(:homepage)
+    end
+  end
+end