handle 204 No Content response

lib/stuart_client_elixir/http_client.ex

@@ -66,6 +66,10 @@ defmodule StuartClientElixir.HttpClient do
     ]
   end
 
+  defp to_api_response({:ok, %HTTPoison.Response{status_code: 204}}) do
+    %{status_code: 204, body: ""}
+  end
+
   defp to_api_response({:ok, %HTTPoison.Response{status_code: status_code, body: body}}) do
     %{status_code: status_code, body: Jason.decode!(body)}
   end

test/stuart_client_elixir/http_client_test.exs

@@ -150,16 +150,39 @@ defmodule StuartClientElixirTest.HttpClientTest do
     end
   end
 
+  describe "handles 204 no content response" do
+    @expected_no_content_response %{status_code: 204, body: ""}
+
+    test "204 no content in GET" do
+      assert HttpClient.get("/no_content", config()) == @expected_no_content_response
+    end
+
+    test "204 no content in POST" do
+      assert HttpClient.post("/no_content", sample_request_body(), config()) ==
+               @expected_no_content_response
+    end
+
+    test "204 no content in PATCH" do
+      assert HttpClient.patch("/no_content", sample_request_body(), config()) ==
+               @expected_no_content_response
+    end
+  end
+
   #####################
   # Private functions #
   #####################
 
   @timeout_url "https://sandbox-api.stuart.com/timeout"
+  @no_content_url "https://sandbox-api.stuart.com/no_content"
 
   defp response(_, @timeout_url) do
     {:error, %HTTPoison.Error{id: nil, reason: :timeout}}
   end
 
+  defp response(_, @no_content_url) do
+    {:ok, %HTTPoison.Response{status_code: 204, body: ""}}
+  end
+
   defp response(:get, _) do
     {:ok, %HTTPoison.Response{status_code: 200, body: Jason.encode!(%{sample: "get response"})}}
   end