Transaction tests

Author: smaximov

test/blog/accounts/accounts_test.exs

@@ -0,0 +1,18 @@
+defmodule Blog.AccountsTest do
+  use Blog.DataCase
+
+  alias Blog.Accounts
+
+  test "create_user/1 returns {:error, changeset} and rolles back transaction on error" do
+    attrs = %{
+      contact: %{type: "phone", value: "+1 000 000 0000"},
+      name: "",
+      password: "password"
+    }
+
+    contact_count = Repo.aggregate(Accounts.Contact, :count, :id)
+
+    assert {:error, %Ecto.Changeset{}} = Accounts.create_user(attrs)
+    assert ^contact_count = Repo.aggregate(Accounts.Contact, :count, :id)
+  end
+end