Add request tests for core Rails endpoints

test/requests/core_flows_test.rb

@@ -0,0 +1,61 @@
+require "test_helper"
+require "active_job/test_helper"
+require "time"
+
+class CoreFlowsTest < ActionDispatch::IntegrationTest
+  include ActiveJob::TestHelper
+
+  setup do
+    @original_queue_adapter = ActiveJob::Base.queue_adapter
+    ActiveJob::Base.queue_adapter = :test
+    clear_enqueued_jobs
+    clear_performed_jobs
+  end
+
+  teardown do
+    clear_enqueued_jobs
+    clear_performed_jobs
+    ActiveJob::Base.queue_adapter = @original_queue_adapter
+  end
+
+  test "GET / responds successfully" do
+    counter = Counter.clicks
+
+    get root_path
+
+    assert_response :success
+    assert_select "h1", text: "Hello, World!"
+    assert_select "#counter_display", text: /\b#{counter.value}\b/
+  end
+
+  test "GET /ping returns the current pong payload" do
+    get ping_path
+
+    assert_response :success
+    assert_equal "application/json", response.media_type
+
+    payload = response.parsed_body
+
+    assert_equal "Pong", payload["message"]
+    assert Time.iso8601(payload["timestamp"])
+  end
+
+  test "POST /increment redirects home and enqueues the increment job" do
+    counter = Counter.clicks
+    counter.update!(value: 7)
+
+    assert_no_changes -> { counter.reload.value } do
+      assert_enqueued_with(job: IncrementCounterJob) do
+        post increment_path
+      end
+    end
+
+    assert_redirected_to root_path
+
+    follow_redirect!
+
+    assert_response :success
+    assert_match "Job enqueued! Counter will increment in ~2 seconds.", response.body
+    assert_select "#counter_display", text: /\b7\b/
+  end
+end