Add some specs for example

Gemfile

@@ -1,6 +1,8 @@
 source 'https://rubygems.org'
 
+gem 'rake'
 gem 'opal',           :github => 'opal/opal'
 gem 'opal-jquery',    :github => 'opal/opal-jquery'
 gem 'vienna',         :github => 'opal/vienna'
-gem 'opal-haml'
+gem 'opal-haml',      :github => 'opal/opal-haml'
+gem 'opal-rspec',     '0.3.0.beta2'

Rakefile

@@ -0,0 +1,8 @@
+require 'bundler'
+Bundler.require
+
+require 'opal/rspec/rake_task'
+Opal::RSpec::RakeTask.new(:default) do |s|
+  s.append_path 'app'
+  s.append_path 'vendor'
+end

spec/todo_spec.rb

@@ -0,0 +1,28 @@
+require 'opal'
+require 'vienna'
+require 'models/todo'
+
+RSpec.configure do |config|
+  config.before { Todo.reset! }
+end
+
+describe Todo do
+  before do
+    @task_a = Todo.create(title: 'Foo', completed: true)
+    @task_b = Todo.create(title: 'Bar', completed: false)
+    @task_c = Todo.create(title: 'Baz', completed: true)
+    @task_d = Todo.create(title: 'Buz', completed: false)
+  end
+
+  describe '.active' do
+    it "returns all non-completed todos" do
+      expect(Todo.active).to eq([@task_b, @task_d])
+    end
+  end
+
+  describe '.completed' do
+    it "returns all completed todos" do
+      expect(Todo.completed).to eq([@task_a, @task_c])
+    end
+  end
+end