figuring out testing - works pretty good so far

test/myapp/data/thread_test.exs

@@ -0,0 +1,41 @@
+defmodule MyApp.Data.ThreadTest do
+  use MyAppWeb.ConnCase, async: true
+  import MyApp.Data.Thread
+  import MyApp.Data.TestHelpers
+
+  defp new_thread(userID, category_id \\ 1) do
+    %{
+      "title" => "test title",
+      "category_id" => category_id,
+      "content" => "test content",
+      "user_id" => userID,
+    }
+  end
+
+  test "insert_thread: try to insert with no parameters" do
+    assert insert_thread(%{}) == {:error,
+    [%{title: "can't be blank"}, %{category_id: "can't be blank"},
+     %{content: "can't be blank"}, %{user_id: "can't be blank"}]}
+  end
+
+  test "insert_thread: insert as invalid user" do
+    assert insert_thread(new_thread(9238748)) == {:error, [%{user_id: "does not exist"}]}
+  end
+
+  test "insert_thread: insert as invalid category_id" do
+    {:ok, user} = new_user()
+    assert insert_thread(new_thread(user.id, 2342342343)) == {:error, [%{category_id: "does not exist"}]}
+  end
+
+  test "new thread should be inserted" do
+    {:ok, user} = new_user()
+    {:ok, thread} = insert_thread(new_thread(user.id))
+    assert thread.title == "test title"
+    assert thread.category_id == 1
+    assert thread.user_id == user.id
+    assert thread.content == "test content"
+  end
+
+  # TODO: update thread
+
+end

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