Switch to RSpec

spec/app_spec.rb

@@ -0,0 +1,21 @@
+ENV["APP_ENV"] = "test"
+
+require "./app"
+require "rspec"
+require "rack/test"
+
+describe "Toy App" do
+  include Rack::Test::Methods
+
+  def app
+    Sinatra::Application
+  end
+
+  context "test /" do
+    it "test root route" do
+      get "/"
+      expect(last_response).to be_ok
+      expect(last_response.body).to eq("hello there!\n")
+    end
+  end
+end