Testing against multiple versions of Terraform using SDKv2

Terraform Providers Plugin Development
1

As far as I understood from announcements, SDKv2 is supposed to facilitate acceptance testing against different versions of Terraform (v12 & v13). How can I achieve that, other than creating different docker containers with different tf versions installed?

It might be also useful to know how to get actual terraform version, that calls the provider.

2

The test framework picks the terraform binary to use when running tests in a hierarchy:

  • If you have TF_ACC_TERRAFORM_PATH set, it will call that binary.
  • If you don’t have TF_ACC_TERRAFORM_PATH set, it will try to find terraform in your PATH. If it can, it’ll use that binary.
  • If it still can’t find Terraform, (I believe) it downloads and installs the version of Terraform specified by the TF_ACC_TERRAFORM_VERSION environment variable, though my (potentially out of date) understanding is that that may be problematic in certain situations involving parallelism.

If I were to make a suggestion for how to run multiple versions of Terraform against your acceptance tests, I would download each of the binaries, maybe to /base/dir/terraform0.12.26/terraform, /base/dir/terraform0.13.0/terraform, /base/dir/terraform0.13.2/terraform, or whatever, and then specify the path to the binary for the version you want to use using TF_ACC_TERRAFORM_PATH.