Add system tests for Claude

This creates system tests for a conversation with Claude using
structured answers.

It also adds a new system spec helper to allow a scenario where
Rails configuration is set to use Claude as an answer strategy.

spec/support/system_spec_helpers.rb

@@ -1,4 +1,10 @@
 module SystemSpecHelpers
+  def given_i_am_using_the_claude_structured_answer_strategy
+    allow(Rails.configuration)
+      .to receive(:answer_strategy)
+      .and_return("claude_structured_answer")
+  end
+
   def given_i_have_confirmed_i_understand_chat_risks
     visit onboarding_limitations_path
 

spec/system/conversation_with_claude_structured_answer_spec.rb

@@ -0,0 +1,80 @@
+RSpec.describe "Conversation with Claude with a structured answer" do
+  scenario do
+    given_i_am_using_the_claude_structured_answer_strategy
+    and_i_am_a_signed_in_early_access_user
+    and_i_have_confirmed_i_understand_chat_risks
+
+    when_i_visit_the_conversation_page
+    and_i_enter_a_question
+    then_i_see_the_answer_is_pending
+
+    when_the_first_answer_is_generated
+    and_i_click_on_the_check_answer_button
+    then_i_see_my_question_on_the_page
+    and_i_can_see_the_first_answer
+
+    when_i_enter_a_second_question
+    then_i_see_the_answer_is_pending
+
+    when_the_second_answer_is_generated
+    and_i_click_on_the_check_answer_button
+    then_i_see_my_second_question_on_the_page
+    and_i_can_see_the_second_answer
+  end
+
+  def when_i_visit_the_conversation_page
+    visit show_conversation_path
+  end
+
+  def and_i_enter_a_question
+    @first_question = "How much tax should I be paying?"
+    fill_in "Message", with: @first_question
+    click_on "Send"
+  end
+
+  def then_i_see_the_answer_is_pending
+    expect(page).to have_content("GOV.UK Chat is generating an answer")
+  end
+
+  def when_the_first_answer_is_generated
+    @first_answer = "Lots of tax."
+    stub_bedrock_converse(
+      bedrock_claude_structured_answer_response(@first_question, @first_answer),
+    )
+    execute_queued_sidekiq_jobs
+  end
+
+  def and_i_click_on_the_check_answer_button
+    click_on "Check if an answer has been generated"
+  end
+
+  def then_i_see_my_question_on_the_page
+    expect(page).to have_content(@first_question)
+  end
+
+  def and_i_can_see_the_first_answer
+    expect(page).to have_content(@first_answer)
+  end
+
+  def when_i_enter_a_second_question
+    @second_question = "Are you sure?"
+    fill_in "Message", with: @second_question
+    click_on "Send"
+  end
+
+  def when_the_second_answer_is_generated
+    @second_answer = "Even more tax."
+    stub_bedrock_converse(
+      bedrock_claude_structured_answer_response(@second_question, @second_answer),
+    )
+    execute_queued_sidekiq_jobs
+  end
+
+  def then_i_see_my_second_question_on_the_page
+    expect(page).to have_content(@second_question)
+  end
+
+  def and_i_can_see_the_second_answer
+    expect(page).to have_content(@second_answer)
+  end
+end