Remove ecto repo, add writing to file

test/birdy_chat_web/api/messages_test.exs

@@ -4,6 +4,9 @@ defmodule BirdyChatWeb.Api.MessagesTest do
   setup %{conn: conn} do
     url = ~p"/api/messages"
 
+    path = Application.app_dir(:birdy_chat, ["priv", "messages", "test-user.txt"])
+    on_exit(fn -> File.rm(path) end)
+
     conn =
       conn
       |> put_req_header("content-type", "application/json")
@@ -28,13 +31,39 @@ defmodule BirdyChatWeb.Api.MessagesTest do
       assert result == expected_result
     end
 
-    test "returns message and ok when successful", %{conn: conn, url: url} do
+    test "returns message and 201 when successful", %{conn: conn, url: url} do
       message = %{"from" => "2-user", "to" => "1-user", "message" => "123"}
       payload = Jason.encode!(message)
       conn = post(conn, url, payload)
       assert result = json_response(conn, :created)
-
       assert result == message
     end
+
+    test "writes message to file", %{conn: conn, url: url} do
+      message = %{"from" => "2-user", "to" => "test-user", "message" => "123"}
+      payload = Jason.encode!(message)
+      conn = post(conn, url, payload)
+      assert result = json_response(conn, :created)
+      assert result == message
+
+      path = Application.app_dir(:birdy_chat, ["priv", "messages", "test-user.txt"])
+      contents = File.read!(path)
+      assert contents == "2-user: 123\n"
+    end
+
+    test "appends message to file", %{conn: conn, url: url} do
+      message = %{"from" => "2-user", "to" => "test-user", "message" => "123"}
+      payload = Jason.encode!(message)
+      post(conn, url, payload)
+
+      message = %{"from" => "2-user", "to" => "test-user", "message" => "456"}
+      payload = Jason.encode!(message)
+      conn = post(conn, url, payload)
+      assert json_response(conn, :created)
+
+      path = Application.app_dir(:birdy_chat, ["priv", "messages", "test-user.txt"])
+      contents = File.read!(path)
+      assert contents == "2-user: 123\n2-user: 456\n"
+    end
   end
 end