Produce integration tests (kafkaex#31)

* Add base produce integration test cases

* Add more complex integration test cases

* Migrate compression tests

test/integration/compression_test.exs

@@ -0,0 +1,139 @@
+defmodule Kayrock.Client.CompressionTest do
+  use Kayrock.IntegrationCase
+  use ExUnit.Case, async: true
+
+  import Kayrock.TestSupport
+  import Kayrock.RequestFactory
+
+  container(:kafka, KafkaContainer.new(), shared: true)
+
+  describe "with compression" do
+    setup do
+      on_exit(fn ->
+        Application.put_env(:kayrock, :snappy_module, :snappy)
+      end)
+
+      :ok
+    end
+
+    test "gzip produce works", %{kafka: kafka} do
+      {:ok, client_pid} = build_client(kafka)
+      topic_name = create_topic(client_pid)
+
+      timestamp = DateTime.utc_now() |> DateTime.to_unix(:millisecond)
+
+      record_batch = %Kayrock.RecordBatch{
+        attributes: 1,
+        records: [
+          %Kayrock.RecordBatch.Record{
+            key: "1",
+            value: "foo",
+            headers: [],
+            timestamp: timestamp,
+            attributes: 1
+          }
+        ]
+      }
+
+      {:ok, resp} = Kayrock.produce(client_pid, record_batch, topic_name, 0)
+
+      partition_resp =
+        resp.responses |> List.first() |> Map.get(:partition_responses) |> List.first()
+
+      partition = partition_resp |> Map.get(:partition)
+      offset = partition_resp |> Map.get(:base_offset)
+
+      {:ok, resp} = Kayrock.fetch(client_pid, topic_name, partition, offset)
+
+      assert_record_batch(resp, %Kayrock.RecordBatch.Record{key: "1", value: "foo"})
+    end
+
+    test "using snappyer produce works", %{kafka: kafka} do
+      Application.put_env(:kayrock, :snappy_module, :snappyer)
+      {:ok, client_pid} = build_client(kafka)
+      topic_name = create_topic(client_pid)
+
+      timestamp = DateTime.utc_now() |> DateTime.to_unix(:millisecond)
+
+      record_batch = %Kayrock.RecordBatch{
+        attributes: 2,
+        records: [
+          %Kayrock.RecordBatch.Record{
+            key: "1",
+            value: "foo",
+            headers: [],
+            timestamp: timestamp,
+            attributes: 1
+          }
+        ]
+      }
+
+      {:ok, resp} = Kayrock.produce(client_pid, record_batch, topic_name, 0)
+
+      partition_resp =
+        resp.responses |> List.first() |> Map.get(:partition_responses) |> List.first()
+
+      partition = partition_resp |> Map.get(:partition)
+      offset = partition_resp |> Map.get(:base_offset)
+
+      {:ok, resp} = Kayrock.fetch(client_pid, topic_name, partition, offset)
+
+      assert_record_batch(resp, %Kayrock.RecordBatch.Record{key: "1", value: "foo"})
+    end
+
+    test "using snappy-erlang-nif produce works", %{kafka: kafka} do
+      {:ok, client_pid} = build_client(kafka)
+      topic_name = create_topic(client_pid)
+
+      timestamp = DateTime.utc_now() |> DateTime.to_unix(:millisecond)
+
+      record_batch = %Kayrock.RecordBatch{
+        attributes: 2,
+        records: [
+          %Kayrock.RecordBatch.Record{
+            key: "1",
+            value: "foo",
+            headers: [],
+            timestamp: timestamp,
+            attributes: 1
+          }
+        ]
+      }
+
+      {:ok, resp} = Kayrock.produce(client_pid, record_batch, topic_name, 0)
+
+      partition_resp =
+        resp.responses |> List.first() |> Map.get(:partition_responses) |> List.first()
+
+      partition = partition_resp |> Map.get(:partition)
+      offset = partition_resp |> Map.get(:base_offset)
+
+      {:ok, resp} = Kayrock.fetch(client_pid, topic_name, partition, offset)
+
+      assert_record_batch(resp, %Kayrock.RecordBatch.Record{key: "1", value: "foo"})
+    end
+  end
+
+  defp build_client(kafka) do
+    uris = [{"localhost", Container.mapped_port(kafka, 9092)}]
+    Kayrock.Client.start_link(uris)
+  end
+
+  defp create_topic(client_pid) do
+    topic_name = unique_string()
+    create_request = create_topic_request(topic_name, 5)
+    {:ok, _} = Kayrock.client_call(client_pid, create_request, :controller)
+    topic_name
+  end
+
+  defp assert_record_batch(response, record) do
+    responses =
+      response.responses |> List.first() |> Map.get(:partition_responses) |> List.first()
+
+    record_set = responses |> Map.get(:record_set) |> List.first()
+    [received_record] = record_set.records
+
+    assert received_record.key == record.key
+    assert received_record.value == record.value
+  end
+end