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@threenative/playtest

v0.1.0

Published

Scenario-driven playtest harness for Three.js games. Runs on plain Three.js with zero ThreeNative dependencies.

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Links

Maintainers

jonit-devjonit-dev

Keywords

Readme

@threenative/playtest

Run a schema-version-1 browser scenario against any development URL:

npx @threenative/playtest playtests/movement.playtest.json \
  --url http://127.0.0.1:5173 --server-command "npm run dev"

Install the bridge from @threenative/playtest/three when semantic entity, camera, movement, or visibility assertions are required. Browser-only input, screenshot, DOM, console, network, and trace evidence does not require an adapter. Run npx @threenative/playtest init to create a config, smoke scenario, and adapter example without changing application source.

Pass chromium flags with --browser-arg, repeated once per flag. A WebGPU target does not start without them:

npx @threenative/playtest playtests/movement.playtest.json \
  --url http://127.0.0.1:5173 \
  --browser-arg --enable-unsafe-webgpu \
  --browser-arg --enable-features=Vulkan

Device targets

The same scenario format runs through --target browser, --target android, or --target ios. An iOS simulator run installs a built app, launches it with simctl, and uses the app data-container mailbox:

npx @threenative/playtest playtests/device-smoke.playtest.json \
  --target ios --app build/threenative-ios.app \
  --bundle-id dev.threenative.runtime --device booted

For a signed physical build, add --ios-transport device --device <devicectl-id>. Network, DOM, and visual-metric assertions are unsupported on device targets and fail TN_PLAYTEST_UNSUPPORTED_ON_TARGET with exit code 2. Default CI does not run Android or iOS device scenarios. .github/workflows/native-platforms.yml is an explicit opt-in platform lane; an absent run is not a pass.

What a passing run means

A scenario only reports pass when at least one assertion was evaluated against an observation that actually arrived. Assertions fail closed: a missing entity, an absent resource, an empty effect log, or a scenario with no assertions at all is a failure, never a silent pass. Wrong-typed assertion values are rejected when the scenario loads rather than dropped, so a scenario cannot quietly run with fewer checks than its author wrote.