Add action ProfilesController#show

app/controllers/profiles_controller.rb

@@ -0,0 +1,5 @@
+class ProfilesController < ApplicationController
+  def show
+    @profile = Profile.find params[:id]
+  end
+end

app/models/profile.rb

@@ -1,3 +1,7 @@
 class Profile < ApplicationRecord
   has_many :posts
+
+  def full_name
+    [first_name, last_name].map(&:presence).compact.join ' '
+  end
 end

app/views/profiles/show.html.erb

@@ -0,0 +1,11 @@
+<h1><%= @profile.full_name %></h1>
+
+<p><%= @profile.description %></p>
+
+<% if @profile.posts.present? %>
+  <ul>
+    <% @profile.posts.each do |post| %>
+      <li><%= post.text %></li>
+    <% end %>
+  </ul>
+<% end %>

config/routes.rb

@@ -1,4 +1,5 @@
 Rails.application.routes.draw do
-  get 'home/show'
   root to: 'home#show'
+
+  resources :profiles, only: :show
 end

test/controllers/profiles_controller_test.rb

@@ -0,0 +1,8 @@
+require "test_helper"
+
+class ProfilesControllerTest < ActionDispatch::IntegrationTest
+  test "should get show" do
+    get profiles_show_url
+    assert_response :success
+  end
+end