diff --git a/test/todo_backend_web/controllers/todo_controller_test.exs b/test/todo_backend_web/controllers/todo_controller_test.exs
@@ -0,0 +1,88 @@
+defmodule TodoBackendWeb.TodoControllerTest do
+  use TodoBackendWeb.ConnCase
+
+  import TodoBackend.TodosFixtures
+
+  alias TodoBackend.Todos.Todo
+
+  @create_attrs %{
+    completed: true,
+    title: "some title"
+  }
+  @update_attrs %{
+    completed: false,
+    title: "some updated title"
+  }
+  @invalid_attrs %{completed: nil, title: nil}
+
+  setup %{conn: conn} do
+    {:ok, conn: put_req_header(conn, "accept", "application/json")}
+  end
+
+  describe "index" do
+    test "lists all todos", %{conn: conn} do
+      conn = get(conn, Routes.todo_path(conn, :index))
+      assert json_response(conn, 200)["data"] == []
+    end
+  end
+
+  describe "create todo" do
+    test "renders todo when data is valid", %{conn: conn} do
+      conn = post(conn, Routes.todo_path(conn, :create), todo: @create_attrs)
+      assert %{"id" => id} = json_response(conn, 201)["data"]
+
+      conn = get(conn, Routes.todo_path(conn, :show, id))
+
+      assert %{
+               "id" => ^id,
+               "completed" => true,
+               "title" => "some title"
+             } = json_response(conn, 200)["data"]
+    end
+
+    test "renders errors when data is invalid", %{conn: conn} do
+      conn = post(conn, Routes.todo_path(conn, :create), todo: @invalid_attrs)
+      assert json_response(conn, 422)["errors"] != %{}
+    end
+  end
+
+  describe "update todo" do
+    setup [:create_todo]
+
+    test "renders todo when data is valid", %{conn: conn, todo: %Todo{id: id} = todo} do
+      conn = put(conn, Routes.todo_path(conn, :update, todo), todo: @update_attrs)
+      assert %{"id" => ^id} = json_response(conn, 200)["data"]
+
+      conn = get(conn, Routes.todo_path(conn, :show, id))
+
+      assert %{
+               "id" => ^id,
+               "completed" => false,
+               "title" => "some updated title"
+             } = json_response(conn, 200)["data"]
+    end
+
+    test "renders errors when data is invalid", %{conn: conn, todo: todo} do
+      conn = put(conn, Routes.todo_path(conn, :update, todo), todo: @invalid_attrs)
+      assert json_response(conn, 422)["errors"] != %{}
+    end
+  end
+
+  describe "delete todo" do
+    setup [:create_todo]
+
+    test "deletes chosen todo", %{conn: conn, todo: todo} do
+      conn = delete(conn, Routes.todo_path(conn, :delete, todo))
+      assert response(conn, 204)
+
+      assert_error_sent 404, fn ->
+        get(conn, Routes.todo_path(conn, :show, todo))
+      end
+    end
+  end
+
+  defp create_todo(_) do
+    todo = todo_fixture()
+    %{todo: todo}
+  end
+end