Update README.md

README.md

@@ -19,7 +19,65 @@ Or install it yourself as:
 
 ## Usage
 
-TODO: Write usage instructions here
+### Rails, ActiveRecord and minitest
+
+
+1. Update Gemfile
+
+        group :development, :test do
+          gem 'letterpress', :require => 'letterpress/rails'
+        end
+
+2. Install the gem
+
+        $ bundle install
+
+3. Generate (test|spec)/blueprint.rb file
+
+        $ rails generate letterpress:install
+
+4. Update config/application.rb
+
+        config.generators do |g|
+          g.test_framework :mini_test, :spec => true, :fixture_replacement => :letterpress
+        end
+
+5. Generate a model object with its factory
+
+        $ rails generate model Comment post_id:integer body:text
+
+6. It adds to the end of file (test|spec)/blueprint.rb
+
+        class Comment < Blueprint(ProxyMethods)
+          default do
+            post_id { 1 }
+            body { "MyText" }
+          end
+        end
+
+7. Modify the generated blueprint according to your preferences
+
+        class Comment < Blueprint(ProxyMethods)
+          default do
+            post { Post.make.new }
+            body { "MyText" }
+          end
+        end
+
+8. Write tests in test/comment_test.rb
+
+        require "minitest_helper"
+
+        class CommentTest < MiniTest::Rails::Model
+          before do
+            @comment = Comment.make.new
+          end
+
+          it "must be valid" do
+            @comment.valid?.must_equal true
+          end
+        end
+
 
 
 Compatibility