Support tests and test directory.

Some commands have no-tests and -test-directory parameters.

• Implement test.
• Add test directory support to SourceSet
• Update the configureXYZ methods in OpenTofuModel and TerraformModel to add test directory support when configuring the listed commands
• Check lifecycle includes these tasks.
• Inputs depends on file patterns mentioned below (and in the docs).
• Command will always be run with -json and the output post-processed.
• If failure is due to tests failed or tests erroring, the raised exception will indicate as such

Supported command-line options

Terraform

• -test-directory. Default will be tests.
• -filter. Can be supplied be more than once.
• -var & -var-file.
• -verbose.
• -parallelism.
• -junit-xml will not be an option, but will always be included and will write a report to an appropriate directory under reports.
• Generate an HTML report from the JUnit XML output.

NOTE: Terraform's -cloud-run will not be supported. It might be done in a future request.

OpenTofu

• -test-directory. Default will be tests.
• -filter. Can be supplied be more than once.
• -var & -var-file.
• -verbose.
• Capture JSON output to a file.
• Will convert processed JSON to a JUnit XML file.

References

• OpenTofu
• Writing Terraform tests
• terraform test command

Some notes from the docs

Each Terraform test lives in a test file. Terraform discovers test files are based on their file extension: .tftest.hcl or .tftest.json.

This [OpenTofu] command will execute all *.tftest.hcl, *.tftest.json, *.tofutest.hcl, and *.tofutest.json files in the current directory or in a directory called tests.