Add feature spec for whole signup process

spec/features/signup_spec.rb

@@ -3,6 +3,7 @@ require "rails_helper"
 RSpec.describe "Signup", type: :feature do
   let(:user) { create :user }
 
+  describe "Invitation handling" do
     before do
       @unused_invitation = Invitation.create(user: user)
       @used_invitation   = Invitation.create(user: user)
@@ -31,9 +32,72 @@ RSpec.describe "Signup", type: :feature do
       expect(current_url).to eq(signup_url)
       expect(page).to have_content("Welcome")
     end
+  end
 
-  scenario "Successful signup" do
+  describe "Signup steps" do
-    visit invitation_url(id: @unused_invitation.token)
+    before do
+      @invitation = Invitation.create(user: user)
+      visit invitation_url(id: @invitation.token)
       click_link "Get started"
     end
+
+    scenario "Successful signup (happy path galore)" do
+      expect(page).to have_content("Choose a username")
+
+      fill_in "user_cn", with: "tony"
+      click_button "Continue"
+      expect(page).to have_content("What's your email?")
+
+      fill_in "user_email", with: "tony@example.com"
+      click_button "Continue"
+      expect(page).to have_content("Choose a password")
+
+      expect(CreateAccount).to receive(:call)
+        .with(username: "tony", email: "tony@example.com", password: "a-valid-password")
+        .and_return(true)
+
+      fill_in "user_password", with: "a-valid-password"
+      click_button "Create account"
+      within ".flash-msg.notice" do
+        expect(page).to have_content("confirm your address")
+      end
+      expect(page).to have_content("close this window or tab now")
+      expect(User.last.confirmed_at).to be_nil
+    end
+
+    scenario "Validation errors" do
+      fill_in "user_cn", with: "t"
+      click_button "Continue"
+      expect(page).to have_content("Username is too short")
+      fill_in "user_cn", with: "jimmy"
+      click_button "Continue"
+      expect(page).to have_content("Username has already been taken")
+      fill_in "user_cn", with: "tony"
+      click_button "Continue"
+
+      fill_in "user_email", with: "tony@"
+      click_button "Continue"
+      expect(page).to have_content("Email is not a valid address")
+      fill_in "user_email", with: ""
+      click_button "Continue"
+      expect(page).to have_content("Email can't be blank")
+      fill_in "user_email", with: "tony@example.com"
+      click_button "Continue"
+
+      fill_in "user_password", with: "123456"
+      click_button "Create account"
+      expect(page).to have_content("Password is too short")
+
+      expect(CreateAccount).to receive(:call)
+        .with(username: "tony", email: "tony@example.com", password: "a-valid-password")
+        .and_return(true)
+
+      fill_in "user_password", with: "a-valid-password"
+      click_button "Create account"
+      within ".flash-msg.notice" do
+        expect(page).to have_content("confirm your address")
+      end
+      expect(User.last.cn).to eq("tony")
+    end
+  end
 end