test: system tests for creating rooms and messages

config/routes.rb

@@ -1,5 +1,5 @@
 Rails.application.routes.draw do
-  resources :rooms, only: [:index, :show, :new, :create] do
+  resources :rooms, only: [ :index, :show, :new, :create ] do
     resources :messages, only: :create
   end
   root "rooms#index"

test/system/user_creates_a_message_test.rb

@@ -0,0 +1,19 @@
+require "application_system_test_case"
+
+class UserCreatesAMessageTest < ApplicationSystemTestCase
+  test "User creates a message" do
+    visit rooms_url
+    click_button("+")
+    assert current_path = new_room_path
+    fill_in("Name", with: "test room")
+    click_button("Create Room")
+    assert_selector "div", text: "test room"
+    click_link("test room")
+    room = Room.last
+    assert current_path = room_path(room.id)
+    fill_in("message[content]", with: "my test message")
+    click_button("Send")
+    assert_selector "div", text: "my test message"
+    assert_selector "div", text: "Sent at:"
+  end
+end

test/system/user_creates_new_rooms_test.rb

@@ -0,0 +1,12 @@
+require "application_system_test_case"
+
+class UserCreatesNewRoomsTest < ApplicationSystemTestCase
+  test "creating a new room" do
+    visit rooms_url
+    click_button("+")
+    assert current_path = new_room_path
+    fill_in("Name", with: "test room")
+    click_button("Create Room")
+    assert_selector "div", text: "test room"
+  end
+end