Add a reporter that emits test-related Open Telemetry spans. #2087
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This commit introduces a variant of the Check reporter that records Open Telemetry traces for package tests. At present it records a parent span for each context/file and child spans for each test case.
Span attributes are drawn from the semantic conventions.
Here is what it looks like running a part of
testthat's own test suite and sending traces to Logfire:It also makes some effort to work out the package's GitHub URL so that we can set VCS-related attributes. This is what allows the
Open in GitHubbutton shown in Logfire to work:Note that this uses the existing session API from theotelpackage to allow parallel testing, but this API has known issues.Basic unit tests are included.