Adjust to the in-house style

- Use jbuilder instead of hashes
- Use resource instead of direct HTTP verbs
    Verbs only make sense if you have one or two routes, if there are
    multiple that emulate what resource does then it's better to use resource.
- Paginate using link headers
- Cache responses

test/controllers/messages/boosts/by_bots_controller_test.rb

@@ -3,27 +3,29 @@ require "test_helper"
 class Messages::Boosts::ByBotsControllerTest < ActionDispatch::IntegrationTest
   setup do
     @room = rooms(:watercooler)
-    @message = messages(:fourth)  # Message in watercooler room where bender bot is a member
+    @message = messages(:fourth)
     @bot = users(:bender)
   end
 
-  test "create adds a boost to the message" do
+  test "create adds a boost to the message and returns it" do
     assert_difference -> { @message.boosts.count }, +1 do
       post room_bot_message_boosts_url(@room, @bot.bot_key, @message), params: +"👀"
       assert_response :created
     end
 
-    assert_equal "👀", @message.boosts.last.content
+    boost = @message.boosts.last
+    assert_equal "👀", boost.content
+    assert_equal @bot, boost.booster
+
+    json = JSON.parse(response.body)
+    assert_equal boost.id, json["id"]
+    assert_equal "👀", json["content"]
+    assert_equal @bot.id, json["booster"]["id"]
+    assert_equal @message.id, json["message"]["id"]
+    assert_equal room_message_url(@room, @message), json["message"]["url"]
   end
 
-  test "create with emoji reaction" do
-    assert_difference -> { Boost.count }, +1 do
-      post room_bot_message_boosts_url(@room, @bot.bot_key, @message), params: +"🎉"
-      assert_response :created
-    end
-  end
-
-  test "create with text reaction" do
+  test "create with text content" do
     assert_difference -> { Boost.count }, +1 do
       post room_bot_message_boosts_url(@room, @bot.bot_key, @message), params: +"Nice!"
       assert_response :created
@@ -38,35 +40,39 @@ class Messages::Boosts::ByBotsControllerTest < ActionDispatch::IntegrationTest
     end
   end
 
-  test "create requires valid bot key" do
+  test "create without content" do
+    assert_no_difference -> { Boost.count } do
+      post room_bot_message_boosts_url(@room, @bot.bot_key, @message)
+      assert_response :unprocessable_content
+
+      post room_bot_message_boosts_url(@room, @bot.bot_key, @message), params: +"   "
+      assert_response :unprocessable_content
+    end
+  end
+
+  test "create requires a valid bot key" do
     assert_no_difference -> { Boost.count } do
       post room_bot_message_boosts_url(@room, "invalid-bot-key", @message), params: +"👀"
     end
-    assert_response :redirect  # Redirects to login
+    assert_response :redirect
   end
 
-  test "create returns not_found for room bot is not a member of" do
-    room_without_bot = rooms(:designers)
-    message_in_other_room = messages(:first)  # Message in designers room
-
+  test "create is not found for a room the bot is not a member of" do
     assert_no_difference -> { Boost.count } do
-      post room_bot_message_boosts_url(room_without_bot, @bot.bot_key, message_in_other_room), params: +"👀"
+      post room_bot_message_boosts_url(rooms(:designers), @bot.bot_key, messages(:first)), params: +"👀"
     end
     assert_response :not_found
   end
 
-  test "create returns not_found for message not in the room" do
-    message_in_other_room = messages(:first)  # Message in designers room, not watercooler
-
+  test "create is not found for a message outside the room" do
     assert_no_difference -> { Boost.count } do
-      post room_bot_message_boosts_url(@room, @bot.bot_key, message_in_other_room), params: +"👀"
+      post room_bot_message_boosts_url(@room, @bot.bot_key, messages(:first)), params: +"👀"
     end
     assert_response :not_found
   end
 
-  test "create can't be abused to post boosts as regular user" do
-    user = users(:kevin)
-    bot_key = "#{user.id}-"
+  test "create can't be abused to post boosts as a regular user" do
+    bot_key = "#{users(:kevin).id}-"
 
     assert_no_difference -> { Boost.count } do
       post room_bot_message_boosts_url(@room, bot_key, @message), params: +"👀"