Improve Code Coverage

Improve test coverage for a Bazel C++ test target or source file path.

Input Resolution

1. Bazel test target (starts with //, e.g. //src/v/bytes/tests:iobuf_test): use it directly.

2. Source file path (e.g. src/v/bytes/iobuf.cc): find the test target:

   bazel query "kind('.*_test', rdeps(//src/v/..., //$(dirname $FILE):$(basename $FILE .cc), 1))" 2>/dev/null
   

   If multiple targets match, pick the one in the closest tests/ directory. If none match, tell the user and stop.

Workflow

Step 1: Baseline Coverage