AssertAssociationCount(t, users, "Account", 3, "After Append")

	// Replace -> same as append

	// Delete
	if err := DB.Model(&users).Association("Account").Delete(&users[0].Account); err != nil {
		t.Errorf("no error should happened when deleting account, but got %v", err)
	}

	AssertAssociationCount(t, users, "Account", 2, "after delete")

	// Clear
	DB.Model(&users).Association("Account").Clear()