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Exercise 4

To create singular test to validate business rule check on AverageTemperature column in aggregate_country_temperatures model​

Follow the instructions below using DBT:

  1. Open your dbt project and navigate to the tests folder.

  2. Create a new file called assert_leeny_face_aggregate_country_temperatures.sql or any suitable name for the singular test file.

  3. In the file, define the query to check whether the AverageTemperature column has leeny face ( ͡° ͜ʖ ͡°) string in its value in aggregate_country_temperatures table.

  4. Specify the table name in the query by referencing the aggregate_country_temperatures table. You can use the ref() function to refer to the table. For example, FROM {{ ref('aggregate_country_temperatures') }}.

  5. Define the query in such a way that it should result output if any row has leeny face in AverageTemperature column.

  6. Save the file.

  7. Run the dbt test project to validate the result. You can use the dbt test command in your terminal to see if test case is successfully completed.