Added some basic test coverage for the helpers

.travis.yml

@@ -3,7 +3,11 @@ rvm:
 - 2.2.2
 gemfile:
 - spec/dummy/Gemfile
-install: bundle install
+install:
+- bundle install
+- cd spec/dummy && bundle install
+- npm install
+- cd -
 script:
 - rake run_rspec:gem
 - rake run_rspec:dummy

spec/dummy/.rspec

@@ -1,2 +1,3 @@
+--format documentation
 --color
 --require spec_helper

spec/dummy/spec/helpers/react_on_rails_helper_spec.rb

@@ -0,0 +1,40 @@
+require "rails_helper"
+
+describe ReactOnRailsHelper do
+  describe "#react_component" do
+    subject { react_component("App") }
+
+    let(:react_component_div) do
+      "<div id=\"App-react-component-0\"></div>"
+    end
+
+    it { expect(self).to respond_to :react_component }
+
+    it { is_expected.to be_an_instance_of ActiveSupport::SafeBuffer }
+    it { is_expected.to start_with "<script>" }
+    it { is_expected.to end_with "</div>\n\n" }
+    it { is_expected.to include react_component_div }
+
+    context "with 'id' option" do
+      subject { react_component("App", {}, id: id) }
+
+      let(:id) { "shaka_div" }
+
+      it { is_expected.to include id }
+      it { is_expected.not_to include react_component_div }
+    end
+  end
+
+  describe "#render_js" do
+    subject { render_js("this.HelloString.world()") }
+
+    let(:hello_world) do
+      "Hello WORLD! Will this work?? YES! Time to visit Maui\n"
+    end
+
+    it { expect(self).to respond_to :react_component }
+
+    it { is_expected.to be_an_instance_of ActiveSupport::SafeBuffer }
+    it { is_expected.to eq hello_world }
+  end
+end