Add acceptance specs for provisioning and port forwarding

spec/Vagrantfile

@@ -23,4 +23,11 @@ Vagrant.configure("2") do |config|
 
   cache_dir = local_apt_cache(config.vm.box)
   config.vm.synced_folder cache_dir, "/var/cache/apt/archives", id: "vagrant-apt-cache"
+
+  config.vm.provision :shell,
+    inline: 'mkdir -p /vagrant/tmp && echo -n "Provisioned" > /vagrant/tmp/provisioning'
+
+  config.vm.network :forwarded_port, guest: 80, host: 8080
+  config.vm.provision :shell,
+    inline: 'sudo apt-get install apache2 -y'
 end

spec/acceptance/sanity_check_spec.rb

@@ -61,14 +61,20 @@ describe 'Sanity check' do
     end
 
     it 'mounts shared folders with the right permissions' do
-      vagrant_ssh 'mkdir -p /vagrant/tmp && echo "Shared" > /vagrant/tmp/shared'
-      shared_file_contents = File.read('/vagrant/spec/tmp/shared').chomp
+      vagrant_ssh 'mkdir -p /vagrant/tmp && echo -n "Shared" > /vagrant/tmp/shared'
+      shared_file_contents = File.read('/vagrant/spec/tmp/shared')
       expect(shared_file_contents).to eq 'Shared'
     end
 
-    it 'provisions the container based on Vagrantfile configs'
+    it 'provisions the container based on Vagrantfile configs' do
+      provisioned_file_contents = File.read('/vagrant/spec/tmp/provisioning')
+      expect(provisioned_file_contents).to eq 'Provisioned'
+    end
 
-    it 'forwards configured ports'
+    it 'forwards configured ports' do
+      output = `curl -s localhost:8080`.strip.chomp
+      expect(output).to include 'It works!'
+    end
   end
 
   context '`vagrant halt` on a running container' do