mockdevice-testing

por facebook

MockDeviceKit for testing without physical glasses hardware

npx skills add https://github.com/facebook/meta-wearables-dat-ios --skill mockdevice-testing

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MockDevice Testing (iOS)

Use MockDeviceKit to test DAT SDK integrations without physical Meta glasses.

MockDeviceKit simulates Meta glasses behavior for development and testing. It provides:

MockDeviceKit — Entry point for creating simulated devices
MockGlasses — Simulated glasses (Ray-Ban Meta, etc.)
MockCameraKit — Simulated camera with configurable video feed and photo capture

Setup

Add MWDATMockDevice to your target via Swift Package Manager (it's included in the meta-wearables-dat-ios package).

import MWDATMockDevice

Creating a mock device

import MWDATMockDevice

let mockDeviceKit = MockDeviceKit.shared
mockDeviceKit.enable()

let mockDevice = try mockDeviceKit.pairGlasses(model: .rayBanMeta)

Simulating device states

// Simulate glasses lifecycle
mockDevice.powerOn()
mockDevice.unfold()
mockDevice.don()    // Simulate wearing the glasses

// Later...
mockDevice.doff()   // Simulate removing
mockDevice.fold()
mockDevice.powerOff()

Configuring permissions

MockDeviceKit provides permissions to control permission behavior without the Meta AI app.

By default, requestPermission() returns .granted. Use set(_:_:) to control checkPermissionStatus() and setRequestResult(_:result:) to control requestPermission() outcomes.

let mockDeviceKit = MockDeviceKit.shared

// Simulate denied camera permission status
mockDeviceKit.permissions.set(.camera, .denied)

// Simulate denied request result (user tapping "deny")
mockDeviceKit.permissions.setRequestResult(.camera, result: .denied)

Setting up mock camera feeds

Video streaming

let camera = mockDevice.services.camera
camera.setCameraFeed(fileURL: videoURL)

Photo capture

let camera = mockDevice.services.camera
camera.setCapturedImage(fileURL: imageURL)

Writing tests with MockDeviceKit

Create a reusable test base class:

import XCTest
import MetaWearablesDAT

@MainActor
class MockDeviceKitTestCase: XCTestCase {
    private var mockDevice: MockGlasses?
    private var cameraKit: MockCameraKit?

    override func setUp() async throws {
        try await super.setUp()
        MockDeviceKit.shared.enable()
        mockDevice = try MockDeviceKit.shared.pairGlasses(model: .rayBanMeta)
        cameraKit = mockDevice?.services.camera // mockDevice is MockGlasses? for tearDown nil-ability
    }

    override func tearDown() async throws {
        MockDeviceKit.shared.disable()
        mockDevice = nil
        cameraKit = nil
        try await super.tearDown()
    }
}