Greg H
02/28/2024, 7:17 PMScout
02/28/2024, 7:17 PMmock
library to fake the resource and associated client. This allows you to test the interaction with the resource without relying on the actual implementation. 5. Refactor Code to Use Resources: If multiple assets or ops interact with a service in a consistent way, or if different implementations of a service are needed in certain scenarios (like staging environments or unit tests), it's recommended to refactor the code to use resources. Here's an example of how you might test an asset that requires a resource, as shown in the documentation: python from dagster import asset, ConfigurableResource class BarResource(ConfigurableResource): my_string: str @asset def asset_requires_bar(bar: BarResource) -> str: return bar.my_string def test_asset_requires_bar(): result = asset_requires_bar(bar=BarResource(my_string="bar")) # ... additional assertions ...
In this example, BarResource
is a simple resource that is being mocked for the purpose of testing the asset_requires_bar
asset. The test directly passes a configured instance of BarResource
to the asset function. Remember to follow the documentation closely for the specific patterns and best practices that apply to your use case. If you encounter any issues or have specific requirements that are not covered by the documentation, you may need to explore additional testing strategies or seek further guidance from the Dagster community or support channels.