figuring out testing - works pretty good so far

test/myapp/data/user_test.exs

@@ -0,0 +1,49 @@
+defmodule MyApp.Data.UserTest do
+  use MyAppWeb.ConnCase, async: true
+  import MyApp.Data.User
+  import MyApp.Data.TestHelpers
+
+  test "user is inserted into database" do
+    {:ok, user} = new_user()
+    assert user == %{
+      access_token: "test_token",
+      battle_net_id: 1,
+      battletag: "mgerb42",
+      id: user.id,
+      permissions: "user",
+    }
+  end
+
+  test "user's battletag is updated" do
+    {:ok, user} = new_user()
+
+    # update user battletag
+    user = user
+    |> atom_key_to_string()
+    |> Map.put("battletag", "mgerb")
+
+    {:ok, user} = upsert_user(user)
+    assert user == %{
+      access_token: "test_token",
+      battle_net_id: 1,
+      battletag: "mgerb",
+      id: user.id,
+      permissions: "user",
+    }
+
+    # call upsert again with same battletag
+    {:ok, user} = user
+    |> atom_key_to_string()
+    |> upsert_user()
+
+    assert user == %{
+      access_token: "test_token",
+      battle_net_id: 1,
+      battletag: "mgerb",
+      id: user.id,
+      permissions: "user",
+    }
+
+  end
+
+end