Code for step 9

uniform_test.exs

@@ -0,0 +1,44 @@
+:rand.seed(:exrop, {1, 2, 3})
+:inets.start()
+:ssl.start()
+
+total_requests = 2_000
+concurrency = 20
+
+book_ids =
+  BookStore.Books.Book
+  |> BookStore.Repo.all()
+  |> Enum.map(fn %BookStore.Books.Book{id: id} -> id end)
+
+request_book_ids =
+  1..ceil(total_requests / length(book_ids))
+  |> Enum.reduce([], fn _, acc ->
+    acc ++ book_ids
+  end)
+  |> Enum.shuffle()
+  |> Enum.take(total_requests)
+  |> Enum.zip(1..total_requests)
+
+request_book_ids
+|> Task.async_stream(
+  fn {book_id, count} ->
+    case rem(count, 3) do
+      0 ->
+        url = 'http://localhost:4000/api/books'
+        method = :get
+        :httpc.request(method, {url, []}, [], [])
+
+      1 ->
+        url = String.to_charlist("http://localhost:4000/api/books/#{book_id}")
+        method = :get
+        :httpc.request(method, {url, []}, [], [])
+
+      2 ->
+        url = String.to_charlist("http://localhost:4000/api/books/#{book_id}/order")
+        method = :post
+        :httpc.request(method, {url, [], 'application/json', '{}'}, [], [])
+    end
+  end,
+  max_concurrency: concurrency
+)
+|> Stream.run()