How to do batch testing and compare the modernized application output result with the legacy application output?

Hi to test the batch (or any testcase in general) we can proceed as follow :

1. Take a snapshot of the the legacy database (initial data)
2. play the test case on legacy application
3. Take snapshot of the legacy data base and migrate it to modern data base ( expected data )
4. Migrate and load the initial snapshot to the modern database
5. play the test case on modern application
6. Compare the database with the expected data ( should be the same)

Test cases must be discussed with customer who can provide the them based on his regular activity using his application

See the following links for more details

• https://bluinsights.aws/docs/terminals-global-capture-strategy
• https://bluinsights.aws/docs/compare-tool-get-started