mockdevice-testing

name	mockdevice-testing
description	MockDeviceKit for testing without physical glasses hardware

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()
    }
}

Using MockDeviceKit in the CameraAccess sample

The CameraAccess sample app includes a Debug menu for MockDeviceKit:

1. Tap the Debug icon to open the MockDeviceKit menu
2. Tap Pair RayBan Meta to create a simulated device
3. Use PowerOn, Unfold, Don to simulate glasses states
4. Select video/image files to configure mock camera feeds
5. Start streaming to see simulated frames

Supported media formats

Type	Formats
Video	h.265 (HEVC)
Image	JPEG, PNG

Links

• Mock Device Kit overview
• iOS testing guide