@0xbigboss/rn-driver-r3f

React Three Fiber (R3F) integration for rn-playwright-driver. Test 3D scenes in your React Native app with a Playwright-style API.

Requirements

• @0xbigboss/rn-playwright-driver >= 0.1.0
• @react-three/fiber >= 8.0.0
• three >= 0.150.0
• @playwright/test >= 1.40.0 (for test fixtures)

Installation

bun add @0xbigboss/rn-driver-r3f

Setup

R3F testing requires setup on both the app side and test side.

App Side (Instrumentation)

Add TestBridge inside your Canvas component. This exposes R3F scene state to the test driver.

import { Canvas } from "@react-three/fiber";
import { TestBridge } from "@0xbigboss/rn-driver-r3f";

function App() {
  return (
    <Canvas>
      {/* Only include in dev/test builds */}
      {__DEV__ && <TestBridge />}
      <MyScene />
    </Canvas>
  );
}

Multi-Canvas Support

If you have multiple Canvas components, give each a unique ID:

<Canvas>
  <TestBridge id="game-canvas" />
  <GameScene />
</Canvas>

<Canvas>
  <TestBridge id="preview-canvas" />
  <PreviewScene />
</Canvas>

Object Identification

Objects are identified by userData.testId (recommended), name, or uuid:

<mesh userData={{ testId: "my-cube" }}>
  <boxGeometry />
  <meshStandardMaterial />
</mesh>

Test Side (Fixtures)

Import test from the r3f package to get the extended device with device.r3f namespace:

import { test, expect } from "@0xbigboss/rn-driver-r3f/test";

test("tap 3D object", async ({ device }) => {
  // R3F locator API
  const cube = device.r3f.getByTestId("my-cube");
  await cube.tap();

  // Check visibility
  expect(await cube.isOnScreen()).toBe(true);

  // Regular device methods still work
  await device.getByTestId("2d-button").tap();
});

API Reference

device.r3f Namespace

Locators

// Get locator by userData.testId (recommended)
device.r3f.getByTestId(testId: string, canvasId?: string): R3FLocator

// Get locator by object name (must be unique)
device.r3f.getByName(name: string, canvasId?: string): R3FLocator

// Get locator by Three.js UUID
device.r3f.getByUuid(uuid: string, canvasId?: string): R3FLocator

Actions

// Tap object (shorthand for getByTestId().tap())
await device.r3f.tap(identifier: string, options?: R3FLookupOptions)

// Hit test at screen coordinates
const hit = await device.r3f.hitTest(x: number, y: number, canvasId?: string)

// Hit test returning all intersected objects
const hits = await device.r3f.hitTestAll(x: number, y: number, canvasId?: string)

// Verify hit test result
await device.r3f.verifyHit(x: number, y: number, expectedTestId: string, canvasId?: string)

R3FLocator Methods

const cube = device.r3f.getByTestId("my-cube");

// Tap the object center
await cube.tap()

// Get screen position (throws if off-screen)
const pos = await cube.screenPosition()
// { x, y, depth, isOnScreen, isInFrustum }

// Get screen bounding box
const bounds = await cube.bounds()
// { x, y, width, height, isOnScreen }

// Get full object info
const info = await cube.info()
// { name, uuid, type, visible, worldPosition, worldQuaternion, worldScale, testId }

// Check visibility
const visible = await cube.isOnScreen()

// Check existence
const exists = await cube.exists()

Lookup Options

type R3FLookupOptions = {
  method?: "testId" | "name" | "uuid";  // default: "testId"
  canvasId?: string;                     // for multi-canvas
};

Optional: Touch Event Routing

For advanced use cases where you need R3F to receive touch events through the harness:

import { Canvas } from "@react-three/fiber";
import { TestBridge, R3FTouchAdapter } from "@0xbigboss/rn-driver-r3f";

function App() {
  return (
    <Canvas>
      {__DEV__ && (
        <>
          <TestBridge />
          <R3FTouchAdapter />
        </>
      )}
      <InteractiveScene />
    </Canvas>
  );
}

Alternative: Standalone Helpers

If you prefer function-based helpers over fixtures:

import { test } from "@0xbigboss/rn-playwright-driver/test";
import { tapR3FObject, getR3FObjectPosition } from "@0xbigboss/rn-driver-r3f/helpers";

test("tap object", async ({ device }) => {
  await tapR3FObject(device, "my-cube");
  const pos = await getR3FObjectPosition(device, "my-cube");
});

Or wrap the device manually:

import { test } from "@0xbigboss/rn-playwright-driver/test";
import { withR3F } from "@0xbigboss/rn-driver-r3f/test";

test("tap object", async ({ device: baseDevice }) => {
  const device = withR3F(baseDevice);
  await device.r3f.tap("my-cube");
});

Production Safety

Do not include TestBridge in production builds:

// Only in dev/test
{__DEV__ && <TestBridge />}

// Or use environment variable
{process.env.E2E_MODE && <TestBridge />}

License

MIT