{% call dbt_unit_testing.test('customers', 'should sum order values to calculate customer_lifetime_value') %}
  
  {% call dbt_unit_testing.mock_ref ('stg_customers', {"input_format": "csv"}) %}
    customer_id, first_name, last_name
    1,'',''
  {% endcall %}
  
  {% call dbt_unit_testing.mock_ref ('stg_orders', {"input_format": "csv"}) %}
    order_id,customer_id,order_date
    1001,1,null
    1002,1,null
  {% endcall %}
  
  {% call dbt_unit_testing.mock_ref ('stg_payments', {"input_format": "csv"}) %}
    order_id,amount
    1001,10
    1002,10
  {% endcall %}

  {% call dbt_unit_testing.expect({"input_format": "csv"}) %}
    customer_id,customer_lifetime_value
    1,20
  {% endcall %}
{% endcall %}

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