rego_parse_error thrown for example tests from documentation

[robert-elles]

Hi,

I am following the documentation for Policy Testing
and as in the documentation I created the two files with their contents: example.rego and example_test.rego.
To run the tests you are supposed to run opa test . -v in the folder where the rego files are. So I do this via docker:
docker run -v $PWD:/tests openpolicyagent/opa:0.42.0-static test /tests -v
The result output is:
/tests/example.rego:4: rego_parse_error: var cannot be used for rule name
/tests/example.rego:9: rego_parse_error: var cannot be used for rule name
/tests/example_test.rego:3: rego_parse_error: var cannot be used for rule name
/tests/example_test.rego:7: rego_parse_error: var cannot be used for rule name
/tests/example_test.rego:11: rego_parse_error: var cannot be used for rule name
/tests/example_test.rego:15: rego_parse_error: var cannot be used for rule name

So it looks like opa test isn't able to run the tests from its own documentation.
What is wrong here?

[srenatus]

Thanks for the report! Well likely push a 0.42.1 soon, if this gets fixed quickly, it'll be part of it. Would you be up to giving it a go?

[srenatus]

☝️ Taken care of it. We had been missing some future.keyword imports (and the error messages could use more hints...)

[robert-elles]

It works, thank you!