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

• c++filt / rustfilt should be available in PATH for demangled names in coverage.
• --instrumentation_filter=.* can be slow in large repositories. Adjust this filter in settings to match your source paths (e.g., --instrumentation_filter="app/*" or --instrumentation_filter="//src/...").
• --combined_report=lcov creates a central bazel-out/_coverage/_coverage_report.dat for easier coverage aggregation. If this file is empty, check that your instrumentation filter matches your source files.
• The extension prioritizes coverage.dat over baseline_coverage.dat (which is often empty).
• Experimental test.xml parsing can be slow or incompatible with some frameworks.

License

MIT License