[Home](./index.md) > [@contract-case/case-boundary](./case-boundary.md) > [ITriggerFunction](./case-boundary.itriggerfunction.md) > [trigger](./case-boundary.itriggerfunction.trigger.md) ## ITriggerFunction.trigger() method Trigger the user's test code and test the response from it. **Signature:** ```typescript trigger(config: Record): Promise; ``` ## Parameters | Parameter | Type | Description | | --------- | ----------------------------- | ----------- | | config | Record<string, unknown> | | **Returns:** Promise<[BoundaryResult](./case-boundary.boundaryresult.md)> BoundarySuccess when successful; BoundaryFailure with kind=BoundaryFailureKindConstants.CASE_TRIGGER_ERROR if the trigger fails; BoundaryFailure with kind=BoundaryFailureKindConstants.CASE_VERIFY_RETURN_ERROR if the verification function fails.