Remove ecto repo, add writing to file

test/birdy_chat/message_writer_test.exs

@@ -0,0 +1,37 @@
+defmodule BirdyChat.MessageWriterTest do
+  use BirdyChat.DataCase, async: true
+
+  describe "write/2" do
+    setup do
+      message = %{to: "123-user", from: "456-user", message: "hello!"}
+      folder = System.tmp_dir!()
+      path = Path.join([folder, "123-user.txt"])
+
+      on_exit(fn -> File.rm!(path) end)
+
+      %{message: message, folder: folder, path: path}
+    end
+
+    test "writes message to a temporary file if a given folder", %{
+      message: message,
+      folder: folder,
+      path: path
+    } do
+      result = BirdyChat.MessageWriter.write(folder, message)
+      assert result == :ok
+      contents = File.read!(path)
+      assert contents == "456-user: hello!\n"
+    end
+
+    test "Appends subsequent messages to a file", %{
+      message: message,
+      folder: folder,
+      path: path
+    } do
+      _result = BirdyChat.MessageWriter.write(folder, message)
+      _result = BirdyChat.MessageWriter.write(folder, message)
+      contents = File.read!(path)
+      assert contents == "456-user: hello!\n456-user: hello!\n"
+    end
+  end
+end

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

test/support/conn_case.ex

@@ -31,8 +31,7 @@ defmodule BirdyChatWeb.ConnCase do
     end
   end
 
-  setup tags do
-    BirdyChat.DataCase.setup_sandbox(tags)
+  setup _tags do
     {:ok, conn: Phoenix.ConnTest.build_conn()}
   end
 end

test/support/data_case.ex

@@ -18,8 +18,6 @@ defmodule BirdyChat.DataCase do
 
   using do
     quote do
-      alias BirdyChat.Repo
-
       import Ecto
       import Ecto.Changeset
       import Ecto.Query
@@ -27,19 +25,10 @@ defmodule BirdyChat.DataCase do
     end
   end
 
-  setup tags do
-    BirdyChat.DataCase.setup_sandbox(tags)
+  setup _tags do
     :ok
   end
 
-  @doc """
-  Sets up the sandbox based on the test tags.
-  """
-  def setup_sandbox(tags) do
-    pid = Ecto.Adapters.SQL.Sandbox.start_owner!(BirdyChat.Repo, shared: not tags[:async])
-    on_exit(fn -> Ecto.Adapters.SQL.Sandbox.stop_owner(pid) end)
-  end
-
   @doc """
   A helper that transforms changeset errors into a map of messages.
 

test/test_helper.exs

@@ -1,2 +1 @@
 ExUnit.start()
-Ecto.Adapters.SQL.Sandbox.mode(BirdyChat.Repo, :manual)