added tests

spec/controllers/application_controller_spec.rb

@@ -36,6 +36,33 @@ describe ApplicationController do
     end
   end
 
+  describe '#set_locale' do
+    let(:locale) { :de }
+
+    context 'when specifying a locale' do
+      it 'overwrites the session' do
+        expect(session).to receive(:[]=).with(:locale, locale.to_s)
+        get :welcome, locale: locale
+      end
+    end
+
+    context "with a 'locale' value in the session" do
+      it 'sets this locale' do
+        session[:locale] = locale
+        expect(I18n).to receive(:locale=).with(locale)
+        get :welcome
+      end
+    end
+
+    context "without a 'locale' value in the session" do
+      it 'sets the default locale' do
+        expect(session[:locale]).to be_blank
+        expect(I18n).to receive(:locale=).with(I18n.default_locale)
+        get :welcome
+      end
+    end
+  end
+
   describe 'GET #welcome' do
     before(:each) { get :welcome }
 

spec/lib/docker_container_mixin_spec.rb

@@ -3,9 +3,16 @@ require 'rails_helper'
 describe DockerContainerMixin do
   [:binds, :port_bindings].each do |method|
     describe "##{method}" do
+      let(:data) { [] }
+
       it 'is defined for Docker::Container' do
         expect(Docker::Container.instance_methods).to include(method)
       end
+
+      it 'returns the correct information' do
+        expect(CONTAINER).to receive(:json).and_return('HostConfig' => {method.to_s.camelize => data})
+        expect(CONTAINER.send(method)).to eq(data)
+      end
     end
   end
 end