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Agent skill

gtest-parallel Test Runner

by webrtc-sdk in webrtc-sdk/webrtc

Runs Google Test binaries in parallel with gtest-parallel to speed up single-threaded tests, repeat flaky ones and filter specific tests.

BSD-3-ClauseAuto-check passedTesting & QA

Install gtest-parallel Test Runner

skills CLI
$ npx skills add webrtc-sdk/webrtc --skill gtest-parallel -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install webrtc-sdk/webrtc gtest-parallel --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/webrtc-sdk/webrtc.git skills-src && mkdir -p .claude/skills && cp -r skills-src/agents/skills/gtest-parallel .claude/skills/gtest-parallel && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
gtest-parallel
GitHub stars
446
Used in
1 other repo
Token cost
~432 tokens
SKILL.md length
163 words
Files
1
Skills in repo
6
Repo updated
First seen
Licence
BSD-3-Clause

At a glance

Runs Google Test binaries in parallel with gtest-parallel to speed up single-threaded tests, repeat flaky ones and filter specific tests.

  • Speeding up a slow Google Test binary
  • SKILL.md covers Location, Core Flags and Advanced Usage
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Repeating a flaky test many times to expose failures

What it does

The skill documents `gtest-parallel`, a script that runs Google Test binaries across several processes so that single-threaded tests, and tests that do not use a full CPU, finish sooner. In this repository the script sits at `third_party/gtest-parallel/gtest-parallel`, and it is called with the path to a test binary.

Core flags cover `--gtest_filter` with Google Test's usual syntax, including exclusions, `--timeout` and `--timeout_per_test` in seconds, `-d` or `--output_dir` for logs under `gtest-parallel-logs/`, and `--dump_json_test_results` for machine-readable results. For flakiness hunting `--repeat` reruns tests many times, `-w` or `--workers` sets the worker count (the default is the number of cores), and `--serialize_test_cases` keeps tests within one test case sequential when they share resources.

When your agent uses it

  • Speeding up a slow Google Test binary
  • Repeating a flaky test many times to expose failures
  • Running only a filtered subset of tests with a timeout

Example prompts

  • “Run ./out/tests/net_unittests with gtest-parallel and only the Foo.* tests.”
  • “Repeat the audio mixer tests 1000 times to see whether they flake.”
  • “Run my test binary with four workers and save the JSON results to results/.”

Requirements

  • A compiled Google Test binary
  • The gtest-parallel script, at `third_party/gtest-parallel/gtest-parallel` in this repository

What it can do on your machine

Read from SKILL.md and the folder at commit 67c4578. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

gtest-parallel Test Runner loads about 432 tokens when it runs. Until then it costs about 46 tokens; SKILL.md has 163 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~46
When it runs · the whole SKILL.md, loaded when a task matches
~432

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from webrtc-sdk/webrtc at commit 67c4578, republished under its BSD-3-Clause licence (© webrtc-sdk). 163 words, ~432 tokens.

Download SKILL.mdSave it as .claude/skills/gtest-parallel/SKILL.md (or your agent's skills folder).
name
gtest-parallel
description
Run Google Test binaries in parallel using the gtest-parallel script. Use when needing to speed up test execution, run flaky tests with repeat, or filter specific tests.

gtest-parallel

gtest-parallel is a script that executes Google Test binaries in parallel, providing speedup for single-threaded tests and tests that do not run at 100% CPU.

Location

The script is located at third_party/gtest-parallel/gtest-parallel.

Core Flags

Filtering Tests

Use --gtest_filter to run a select set of tests. It supports the same syntax as Google Test (including exclusion with -).

bash
third_party/gtest-parallel/gtest-parallel path/to/binary --gtest_filter=Foo.*:Bar.*
Timeouts
  • --timeout=TIMEOUT: Interrupt all remaining processes after the given time (in seconds).
  • --timeout_per_test=TIMEOUT_PER_TEST: Interrupt single processes after the given time (in seconds).
Output and Logging
  • -d OUTPUT_DIR, --output_dir=OUTPUT_DIR: Output directory for test logs. Logs will be available under gtest-parallel-logs/ inside the specified directory.
  • --dump_json_test_results=DUMP_JSON_TEST_RESULTS: Saves the results of the tests as a JSON machine-readable file.

Advanced Usage

Repeating Tests (Flakiness Testing)

Use --repeat=N to run tests multiple times.

bash
third_party/gtest-parallel/gtest-parallel path/to/binary --repeat=1000
Workers

Use -w WORKERS or --workers=WORKERS to specify the number of parallel workers (defaults to the number of cores).

Serializing Test Cases

Use --serialize_test_cases to run tests within the same test case sequentially (useful if they share resources).

© webrtc-sdk, BSD-3-Clause. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in agents/skills/gtest-parallel of webrtc-sdk/webrtc.

Open the folder on GitHubat commit 67c4578

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in webrtc-sdk/webrtc, which our catalogue first saw on October 7, 2026.

Compare with similar skills

gtest-parallel Test Runner next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

gtest-parallel Test Runner compared with similar skills
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gtest-parallel Test Runner this skillwebrtc-sdk/webrtc4461 repos~432Automated safety check: PassBSD-3-Clause
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CI FixFastLED/FastLED7.5k—~897Automated safety check: PassMIT
Quay Prow Triagequay/quay2.8k—~2.9kAutomated safety check: PassApache-2.0
Test Guidelinesgetsentry/sentry-react-native1.8k—~1.3kAutomated safety check: PassMIT
Ckeditor5 TestingTriliumNext/Trilium38k—~3.3kAutomated safety check: PassAGPL-3.0

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Categories

Questions about gtest-parallel Test Runner

What does gtest-parallel Test Runner do?

Runs Google Test binaries in parallel with gtest-parallel to speed up single-threaded tests, repeat flaky ones and filter specific tests. The skill documents `gtest-parallel`, a script that runs Google Test binaries across several processes so that single-threaded tests, and tests that do not use a full CPU, finish sooner. In this repository the script sits at `third_party/gtest-parallel/gtest-parallel`, and it is called with the path to a test binary.

When should I use gtest-parallel Test Runner?

gtest-parallel Test Runner fits situations like: speeding up a slow Google Test binary; repeating a flaky test many times to expose failures; running only a filtered subset of tests with a timeout.

How do I install gtest-parallel Test Runner in Claude Code?

Run `npx skills add webrtc-sdk/webrtc --skill gtest-parallel -a claude-code`. Or copy the skill folder (agents/skills/gtest-parallel in webrtc-sdk/webrtc) into .claude/skills/gtest-parallel in your project. Claude Code loads it when a task matches its description.

How do I install gtest-parallel Test Runner in Codex?

Run `npx skills add webrtc-sdk/webrtc --skill gtest-parallel -a codex`. Or copy the skill folder (agents/skills/gtest-parallel in webrtc-sdk/webrtc) into .agents/skills/gtest-parallel in your project. Codex loads it when a task matches its description.

Can I use gtest-parallel Test Runner in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add webrtc-sdk/webrtc --skill gtest-parallel -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gtest-parallel, .gemini/skills/gtest-parallel, .github/skills/gtest-parallel and .opencode/skills/gtest-parallel in your project.

What does gtest-parallel Test Runner need to run?

SKILL.md names no scripts, command-line tools or credentials: gtest-parallel Test Runner is instructions for the agent only. Our summary lists: A compiled Google Test binary; The gtest-parallel script, at `third_party/gtest-parallel/gtest-parallel` in this repository.

Does gtest-parallel Test Runner access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is gtest-parallel Test Runner safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does gtest-parallel Test Runner use?

gtest-parallel Test Runner is published under the BSD-3-Clause licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does gtest-parallel Test Runner use?

About 432 tokens (SKILL.md is roughly 1.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to gtest-parallel Test Runner?

Skills that share tags, products or a category with gtest-parallel Test Runner: Debug Playwright Prow (quay/quay, 2.8k stars), CI Fix (FastLED/FastLED, 7.5k stars), Quay Prow Triage (quay/quay, 2.8k stars) and Test Guidelines (getsentry/sentry-react-native, 1.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains gtest-parallel Test Runner?

webrtc-sdk (a GitHub organization) maintains it in webrtc-sdk/webrtc, which has 446 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on October 6, 2026.

Source: webrtc-sdk/webrtc on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.