Bazel TestExplorer

Test Explorer + Coverage for Bazel tests in VS Code.

Uses bazel query, bazel test, and bazel coverage, integrated with the VS Code Testing API.

Features

• Show tests in the Testing view (query + run).
• CodeLens, gutter markers, diagnostics.
• Coverage reports in the Testing UI.
• Test Details panel (incl. Coverage tab).
• Advanced Bazel test settings.

Installation

1. Install the extension from the VS Code Marketplace.
2. Ensure Bazel is installed.

Usage

1. Open Testing.
2. Run tests or Coverage from the UI.

Settings

• bazelTestExplorer.testTypes - e.g. cc_test, rust_test, py_test, go_test.
• bazelTestExplorer.queryPaths - //... or specific paths.
• bazelTestExplorer.testArgs - extra flags for bazel test.
• bazelTestExplorer.coverageArgs - extra flags for bazel coverage.

Screenshot

Remarks to coverage:

To get a working coverage (with C/C++) is sometimes annoying. Here some tipps:

• MODULE.bazel.:
  • use bazel_dep(name = "toolchains_llvm", version = "1.6.0") and llvm_version = "19.1.0" or newer.
• .bazelrc:
  • --combined_report=lcov creates a central bazel-out/_coverage/_coverage_report.dat for easier coverage aggregation.
  • --instrumentation_filter=.* can be slow in large repositories. Adjust this filter in settings to match your source paths (e.g. --instrumentation_filter="//src/...").
  • set coverage --experimental_use_llvm_covmap and coverage --experimental_generate_llvm_lcov
  • on macOS set coverage --copt=-fcoverage-compilation-dir=.
• System:
  • c++filt / rustfilt should be available in PATH for demangled names in coverage.

Coverage should be working in terminal!! If not the extension can not fix this.

License

MIT License