We have a module which uses an external data source to set count to conditionally provision a resource depending on whether something not owned by Terraform exists.
We need to mock this in order to be able to run some Terraform tests against the module.
I have looked at Tests - Provider Mocking | Terraform | HashiCorp Developer and tried some things, but I’ve not got anything to work yet.
Hoping someone has already done this and can sign post an example.