'use strict';
const content = {};
const bluetooth = {};
const MOJO_CHOOSER_EVENT_TYPE_MAP = {};
function toMojoCentralState(state) {
switch (state) {
case 'absent':
return bluetooth.mojom.CentralState.ABSENT;
case 'powered-off':
return bluetooth.mojom.CentralState.POWERED_OFF;
case 'powered-on':
return bluetooth.mojom.CentralState.POWERED_ON;
default:
throw `Unsupported value ${state} for state.`;
}
}
// Converts bluetooth.mojom.WriteType to a string. If |writeType| is
// invalid, this method will throw.
function writeTypeToString(writeType) {
switch (writeType) {
case bluetooth.mojom.WriteType.kNone:
return 'none';
case bluetooth.mojom.WriteType.kWriteDefaultDeprecated:
return 'default-deprecated';
case bluetooth.mojom.WriteType.kWriteWithResponse:
return 'with-response';
case bluetooth.mojom.WriteType.kWriteWithoutResponse:
return 'without-response';
default:
throw `Unknown bluetooth.mojom.WriteType: ${writeType}`;
}
}
// Canonicalizes UUIDs and converts them to Mojo UUIDs.
function canonicalizeAndConvertToMojoUUID(uuids) {
let canonicalUUIDs = uuids.map(val => ({uuid: BluetoothUUID.getService(val)}));
return canonicalUUIDs;
}
// Converts WebIDL a record<DOMString, BufferSource> to a map<K, array<uint8>> to
// use for Mojo, where the value for K is calculated using keyFn.
function convertToMojoMap(record, keyFn, isNumberKey = false) {
let map = new Map();
for (const [key, value] of Object.entries(record)) {
let buffer = ArrayBuffer.isView(value) ? value.buffer : value;
if (isNumberKey) {
let numberKey = parseInt(key);
if (Number.isNaN(numberKey))
throw `Map key ${key} is not a number`;
map.set(keyFn(numberKey), Array.from(new Uint8Array(buffer)));
continue;
}
map.set(keyFn(key), Array.from(new Uint8Array(buffer)));
}
return map;
}
function ArrayToMojoCharacteristicProperties(arr) {
const struct = {};
arr.forEach(property => { struct[property] = true; });
return struct;
}
class FakeBluetooth {
constructor() {
this.fake_bluetooth_ptr_ = new bluetooth.mojom.FakeBluetoothRemote();
this.fake_bluetooth_ptr_.$.bindNewPipeAndPassReceiver().bindInBrowser('process');
this.fake_central_ = null;
}
// Set it to indicate whether the platform supports BLE. For example,
// Windows 7 is a platform that doesn't support Low Energy. On the other
// hand Windows 10 is a platform that does support LE, even if there is no
// Bluetooth radio present.
async setLESupported(supported) {
if (typeof supported !== 'boolean') throw 'Type Not Supported';
await this.fake_bluetooth_ptr_.setLESupported(supported);
}
// Returns a promise that resolves with a FakeCentral that clients can use
// to simulate events that a device in the Central/Observer role would
// receive as well as monitor the operations performed by the device in the
// Central/Observer role.
// Calls sets LE as supported.
//
// A "Central" object would allow its clients to receive advertising events
// and initiate connections to peripherals i.e. operations of two roles
// defined by the Bluetooth Spec: Observer and Central.
// See Bluetooth 4.2 Vol 3 Part C 2.2.2 "Roles when Operating over an
// LE Physical Transport".
async simulateCentral({state}) {
if (this.fake_central_)
throw 'simulateCentral() should only be called once';
await this.setLESupported(true);
let {fakeCentral: fake_central_ptr} =
await this.fake_bluetooth_ptr_.simulateCentral(
toMojoCentralState(state));
this.fake_central_ = new FakeCentral(fake_central_ptr);
return this.fake_central_;
}
// Returns true if there are no pending responses.
async allResponsesConsumed() {
let {consumed} = await this.fake_bluetooth_ptr_.allResponsesConsumed();
return consumed;
}
// Returns a promise that resolves with a FakeChooser that clients can use to
// simulate chooser events.
async getManualChooser() {
if (typeof this.fake_chooser_ === 'undefined') {
this.fake_chooser_ = new FakeChooser();
}
return this.fake_chooser_;
}
}
// FakeCentral allows clients to simulate events that a device in the
// Central/Observer role would receive as well as monitor the operations
// performed by the device in the Central/Observer role.
class FakeCentral {
constructor(fake_central_ptr) {
this.fake_central_ptr_ = fake_central_ptr;
this.peripherals_ = new Map();
}
// Simulates a peripheral with |address|, |name|, |manufacturerData| and
// |known_service_uuids| that has already been connected to the system. If the
// peripheral existed already it updates its name, manufacturer data, and
// known UUIDs. |known_service_uuids| should be an array of
// BluetoothServiceUUIDs
// https://webbluetoothcg.github.io/web-bluetooth/#typedefdef-bluetoothserviceuuid
//
// Platforms offer methods to retrieve devices that have already been
// connected to the system or weren't connected through the UA e.g. a user
// connected a peripheral through the system's settings. This method is
// intended to simulate peripherals that those methods would return.
async simulatePreconnectedPeripheral(
{address, name, manufacturerData = {}, knownServiceUUIDs = []}) {
await this.fake_central_ptr_.simulatePreconnectedPeripheral(
address, name,
convertToMojoMap(manufacturerData, Number, true /* isNumberKey */),
canonicalizeAndConvertToMojoUUID(knownServiceUUIDs));
return this.fetchOrCreatePeripheral_(address);
}
// Simulates an advertisement packet described by |scanResult| being received
// from a device. If central is currently scanning, the device will appear on
// the list of discovered devices.
async simulateAdvertisementReceived(scanResult) {
// Create a deep-copy to prevent the original |scanResult| from being
// modified when the UUIDs, manufacturer, and service data are converted.
let clonedScanResult = JSON.parse(JSON.stringify(scanResult));
if ('uuids' in scanResult.scanRecord) {
clonedScanResult.scanRecord.uuids =
canonicalizeAndConvertToMojoUUID(scanResult.scanRecord.uuids);
}
// Convert the optional appearance and txPower fields to the corresponding
// Mojo structures, since Mojo does not support optional interger values. If
// the fields are undefined, set the hasValue field as false and value as 0.
// Otherwise, set the hasValue field as true and value with the field value.
const has_appearance = 'appearance' in scanResult.scanRecord;
clonedScanResult.scanRecord.appearance = {
hasValue: has_appearance,
value: (has_appearance ? scanResult.scanRecord.appearance : 0)
}
const has_tx_power = 'txPower' in scanResult.scanRecord;
clonedScanResult.scanRecord.txPower = {
hasValue: has_tx_power,
value: (has_tx_power ? scanResult.scanRecord.txPower : 0)
}
// Convert manufacturerData from a record<DOMString, BufferSource> into a
// map<uint8, array<uint8>> for Mojo.
if ('manufacturerData' in scanResult.scanRecord) {
clonedScanResult.scanRecord.manufacturerData = convertToMojoMap(
scanResult.scanRecord.manufacturerData, Number,
true /* isNumberKey */);
}
// Convert serviceData from a record<DOMString, BufferSource> into a
// map<string, array<uint8>> for Mojo.
if ('serviceData' in scanResult.scanRecord) {
clonedScanResult.scanRecord.serviceData.serviceData = convertToMojoMap(
scanResult.scanRecord.serviceData, BluetoothUUID.getService,
false /* isNumberKey */);
}
await this.fake_central_ptr_.simulateAdvertisementReceived(
clonedScanResult);
return this.fetchOrCreatePeripheral_(clonedScanResult.deviceAddress);
}
// Simulates a change in the central device described by |state|. For example,
// setState('powered-off') can be used to simulate the central device powering
// off.
//
// This method should be used for any central state changes after
// simulateCentral() has been called to create a FakeCentral object.
async setState(state) {
await this.fake_central_ptr_.setState(toMojoCentralState(state));
}
// Create a fake_peripheral object from the given address.
fetchOrCreatePeripheral_(address) {
let peripheral = this.peripherals_.get(address);
if (peripheral === undefined) {
peripheral = new FakePeripheral(address, this.fake_central_ptr_);
this.peripherals_.set(address, peripheral);
}
return peripheral;
}
}
class FakePeripheral {
constructor(address, fake_central_ptr) {
this.address = address;
this.fake_central_ptr_ = fake_central_ptr;
}
// Adds a fake GATT Service with |uuid| to be discovered when discovering
// the peripheral's GATT Attributes. Returns a FakeRemoteGATTService
// corresponding to this service. |uuid| should be a BluetoothServiceUUIDs
// https://webbluetoothcg.github.io/web-bluetooth/#typedefdef-bluetoothserviceuuid
async addFakeService({uuid}) {
let {serviceId: service_id} = await this.fake_central_ptr_.addFakeService(
this.address, {uuid: BluetoothUUID.getService(uuid)});
if (service_id === null) throw 'addFakeService failed';
return new FakeRemoteGATTService(
service_id, this.address, this.fake_central_ptr_);
}
// Sets the next GATT Connection request response to |code|. |code| could be
// an HCI Error Code from BT 4.2 Vol 2 Part D 1.3 List Of Error Codes or a
// number outside that range returned by specific platforms e.g. Android
// returns 0x101 to signal a GATT failure
// https://developer.android.com/reference/android/bluetooth/BluetoothGatt.html#GATT_FAILURE
async setNextGATTConnectionResponse({code}) {
let {success} =
await this.fake_central_ptr_.setNextGATTConnectionResponse(
this.address, code);
if (success !== true) throw 'setNextGATTConnectionResponse failed.';
}
// Sets the next GATT Discovery request response for peripheral with
// |address| to |code|. |code| could be an HCI Error Code from
// BT 4.2 Vol 2 Part D 1.3 List Of Error Codes or a number outside that
// range returned by specific platforms e.g. Android returns 0x101 to signal
// a GATT failure
// https://developer.android.com/reference/android/bluetooth/BluetoothGatt.html#GATT_FAILURE
//
// The following procedures defined at BT 4.2 Vol 3 Part G Section 4.
// "GATT Feature Requirements" are used to discover attributes of the
// GATT Server:
// - Primary Service Discovery
// - Relationship Discovery
// - Characteristic Discovery
// - Characteristic Descriptor Discovery
// This method aims to simulate the response once all of these procedures
// have completed or if there was an error during any of them.
async setNextGATTDiscoveryResponse({code}) {
let {success} =
await this.fake_central_ptr_.setNextGATTDiscoveryResponse(
this.address, code);
if (success !== true) throw 'setNextGATTDiscoveryResponse failed.';
}
// Simulates a GATT disconnection from the peripheral with |address|.
async simulateGATTDisconnection() {
let {success} =
await this.fake_central_ptr_.simulateGATTDisconnection(this.address);
if (success !== true) throw 'simulateGATTDisconnection failed.';
}
// Simulates an Indication from the peripheral's GATT `Service Changed`
// Characteristic from BT 4.2 Vol 3 Part G 7.1. This Indication is signaled
// when services, characteristics, or descriptors are changed, added, or
// removed.
//
// The value for `Service Changed` is a range of attribute handles that have
// changed. However, this testing specification works at an abstracted
// level and does not expose setting attribute handles when adding
// attributes. Consequently, this simulate method should include the full
// range of all the peripheral's attribute handle values.
async simulateGATTServicesChanged() {
let {success} =
await this.fake_central_ptr_.simulateGATTServicesChanged(this.address);
if (success !== true) throw 'simulateGATTServicesChanged failed.';
}
}
class FakeRemoteGATTService {
constructor(service_id, peripheral_address, fake_central_ptr) {
this.service_id_ = service_id;
this.peripheral_address_ = peripheral_address;
this.fake_central_ptr_ = fake_central_ptr;
}
// Adds a fake GATT Characteristic with |uuid| and |properties|
// to this fake service. The characteristic will be found when discovering
// the peripheral's GATT Attributes. Returns a FakeRemoteGATTCharacteristic
// corresponding to the added characteristic.
async addFakeCharacteristic({uuid, properties}) {
let {characteristicId: characteristic_id} =
await this.fake_central_ptr_.addFakeCharacteristic(
{uuid: BluetoothUUID.getCharacteristic(uuid)},
ArrayToMojoCharacteristicProperties(properties),
this.service_id_,
this.peripheral_address_);
if (characteristic_id === null) throw 'addFakeCharacteristic failed';
return new FakeRemoteGATTCharacteristic(
characteristic_id, this.service_id_,
this.peripheral_address_, this.fake_central_ptr_);
}
// Removes the fake GATT service from its fake peripheral.
async remove() {
let {success} =
await this.fake_central_ptr_.removeFakeService(
this.service_id_,
this.peripheral_address_);
if (!success) throw 'remove failed';
}
}
class FakeRemoteGATTCharacteristic {
constructor(characteristic_id, service_id, peripheral_address,
fake_central_ptr) {
this.ids_ = [characteristic_id, service_id, peripheral_address];
this.descriptors_ = [];
this.fake_central_ptr_ = fake_central_ptr;
}
// Adds a fake GATT Descriptor with |uuid| to be discovered when
// discovering the peripheral's GATT Attributes. Returns a
// FakeRemoteGATTDescriptor corresponding to this descriptor. |uuid| should
// be a BluetoothDescriptorUUID
// https://webbluetoothcg.github.io/web-bluetooth/#typedefdef-bluetoothdescriptoruuid
async addFakeDescriptor({uuid}) {
let {descriptorId: descriptor_id} =
await this.fake_central_ptr_.addFakeDescriptor(
{uuid: BluetoothUUID.getDescriptor(uuid)}, ...this.ids_);
if (descriptor_id === null) throw 'addFakeDescriptor failed';
let fake_descriptor = new FakeRemoteGATTDescriptor(
descriptor_id, ...this.ids_, this.fake_central_ptr_);
this.descriptors_.push(fake_descriptor);
return fake_descriptor;
}
// Sets the next read response for characteristic to |code| and |value|.
// |code| could be a GATT Error Response from
// BT 4.2 Vol 3 Part F 3.4.1.1 Error Response or a number outside that range
// returned by specific platforms e.g. Android returns 0x101 to signal a GATT
// failure.
// https://developer.android.com/reference/android/bluetooth/BluetoothGatt.html#GATT_FAILURE
async setNextReadResponse(gatt_code, value=null) {
if (gatt_code === 0 && value === null) {
throw '|value| can\'t be null if read should success.';
}
if (gatt_code !== 0 && value !== null) {
throw '|value| must be null if read should fail.';
}
let {success} =
await this.fake_central_ptr_.setNextReadCharacteristicResponse(
gatt_code, value, ...this.ids_);
if (!success) throw 'setNextReadCharacteristicResponse failed';
}
// Sets the next write response for this characteristic to |code|. If
// writing to a characteristic that only supports 'write_without_response'
// the set response will be ignored.
// |code| could be a GATT Error Response from
// BT 4.2 Vol 3 Part F 3.4.1.1 Error Response or a number outside that range
// returned by specific platforms e.g. Android returns 0x101 to signal a GATT
// failure.
async setNextWriteResponse(gatt_code) {
let {success} =
await this.fake_central_ptr_.setNextWriteCharacteristicResponse(
gatt_code, ...this.ids_);
if (!success) throw 'setNextWriteCharacteristicResponse failed';
}
// Sets the next subscribe to notifications response for characteristic with
// |characteristic_id| in |service_id| and in |peripheral_address| to
// |code|. |code| could be a GATT Error Response from BT 4.2 Vol 3 Part F
// 3.4.1.1 Error Response or a number outside that range returned by
// specific platforms e.g. Android returns 0x101 to signal a GATT failure.
async setNextSubscribeToNotificationsResponse(gatt_code) {
let {success} =
await this.fake_central_ptr_.setNextSubscribeToNotificationsResponse(
gatt_code, ...this.ids_);
if (!success) throw 'setNextSubscribeToNotificationsResponse failed';
}
// Sets the next unsubscribe to notifications response for characteristic with
// |characteristic_id| in |service_id| and in |peripheral_address| to
// |code|. |code| could be a GATT Error Response from BT 4.2 Vol 3 Part F
// 3.4.1.1 Error Response or a number outside that range returned by
// specific platforms e.g. Android returns 0x101 to signal a GATT failure.
async setNextUnsubscribeFromNotificationsResponse(gatt_code) {
let {success} =
await this.fake_central_ptr_.setNextUnsubscribeFromNotificationsResponse(
gatt_code, ...this.ids_);
if (!success) throw 'setNextUnsubscribeToNotificationsResponse failed';
}
// Returns true if notifications from the characteristic have been subscribed
// to.
async isNotifying() {
let {success, isNotifying} =
await this.fake_central_ptr_.isNotifying(...this.ids_);
if (!success) throw 'isNotifying failed';
return isNotifying;
}
// Gets the last successfully written value to the characteristic and its
// write type. Write type is one of 'none', 'default-deprecated',
// 'with-response', 'without-response'. Returns {lastValue: null,
// lastWriteType: 'none'} if no value has yet been written to the
// characteristic.
async getLastWrittenValue() {
let {success, value, writeType} =
await this.fake_central_ptr_.getLastWrittenCharacteristicValue(
...this.ids_);
if (!success) throw 'getLastWrittenCharacteristicValue failed';
return {lastValue: value, lastWriteType: writeTypeToString(writeType)};
}
// Removes the fake GATT Characteristic from its fake service.
async remove() {
let {success} =
await this.fake_central_ptr_.removeFakeCharacteristic(...this.ids_);
if (!success) throw 'remove failed';
}
}
class FakeRemoteGATTDescriptor {
constructor(descriptor_id,
characteristic_id,
service_id,
peripheral_address,
fake_central_ptr) {
this.ids_ = [
descriptor_id, characteristic_id, service_id, peripheral_address];
this.fake_central_ptr_ = fake_central_ptr;
}
// Sets the next read response for descriptor to |code| and |value|.
// |code| could be a GATT Error Response from
// BT 4.2 Vol 3 Part F 3.4.1.1 Error Response or a number outside that range
// returned by specific platforms e.g. Android returns 0x101 to signal a GATT
// failure.
// https://developer.android.com/reference/android/bluetooth/BluetoothGatt.html#GATT_FAILURE
async setNextReadResponse(gatt_code, value=null) {
if (gatt_code === 0 && value === null) {
throw '|value| cannot be null if read should succeed.';
}
if (gatt_code !== 0 && value !== null) {
throw '|value| must be null if read should fail.';
}
let {success} =
await this.fake_central_ptr_.setNextReadDescriptorResponse(
gatt_code, value, ...this.ids_);
if (!success) throw 'setNextReadDescriptorResponse failed';
}
// Sets the next write response for this descriptor to |code|.
// |code| could be a GATT Error Response from
// BT 4.2 Vol 3 Part F 3.4.1.1 Error Response or a number outside that range
// returned by specific platforms e.g. Android returns 0x101 to signal a GATT
// failure.
async setNextWriteResponse(gatt_code) {
let {success} =
await this.fake_central_ptr_.setNextWriteDescriptorResponse(
gatt_code, ...this.ids_);
if (!success) throw 'setNextWriteDescriptorResponse failed';
}
// Gets the last successfully written value to the descriptor.
// Returns null if no value has yet been written to the descriptor.
async getLastWrittenValue() {
let {success, value} =
await this.fake_central_ptr_.getLastWrittenDescriptorValue(
...this.ids_);
if (!success) throw 'getLastWrittenDescriptorValue failed';
return value;
}
// Removes the fake GATT Descriptor from its fake characteristic.
async remove() {
let {success} =
await this.fake_central_ptr_.removeFakeDescriptor(...this.ids_);
if (!success) throw 'remove failed';
}
}
// FakeChooser allows clients to simulate user actions on a Bluetooth chooser,
// and records the events produced by the Bluetooth chooser.
class FakeChooser {
constructor() {
let fakeBluetoothChooserFactoryRemote =
new content.mojom.FakeBluetoothChooserFactoryRemote();
fakeBluetoothChooserFactoryRemote.$.bindNewPipeAndPassReceiver().bindInBrowser('process');
this.fake_bluetooth_chooser_ptr_ =
new content.mojom.FakeBluetoothChooserRemote();
this.fake_bluetooth_chooser_client_receiver_ =
new content.mojom.FakeBluetoothChooserClientReceiver(this);
fakeBluetoothChooserFactoryRemote.createFakeBluetoothChooser(
this.fake_bluetooth_chooser_ptr_.$.bindNewPipeAndPassReceiver(),
this.fake_bluetooth_chooser_client_receiver_.$.associateAndPassRemote());
this.events_ = new Array();
this.event_listener_ = null;
}
// If the chooser has received more events than |numOfEvents| this function
// will reject the promise, else it will wait until |numOfEvents| events are
// received before resolving with an array of |FakeBluetoothChooserEvent|
// objects.
async waitForEvents(numOfEvents) {
return new Promise(resolve => {
if (this.events_.length > numOfEvents) {
throw `Asked for ${numOfEvents} event(s), but received ` +
`${this.events_.length}.`;
}
this.event_listener_ = () => {
if (this.events_.length === numOfEvents) {
let result = Array.from(this.events_);
this.event_listener_ = null;
this.events_ = [];
resolve(result);
}
};
this.event_listener_();
});
}
async selectPeripheral(peripheral) {
if (!(peripheral instanceof FakePeripheral)) {
throw '|peripheral| must be an instance of FakePeripheral';
}
await this.fake_bluetooth_chooser_ptr_.selectPeripheral(peripheral.address);
}
async cancel() {
await this.fake_bluetooth_chooser_ptr_.cancel();
}
async rescan() {
await this.fake_bluetooth_chooser_ptr_.rescan();
}
onEvent(chooserEvent) {
chooserEvent.type = MOJO_CHOOSER_EVENT_TYPE_MAP[chooserEvent.type];
this.events_.push(chooserEvent);
if (this.event_listener_ !== null) {
this.event_listener_();
}
}
}
async function initializeChromiumResources() {
content.mojom = await import(
'/gen/content/web_test/common/fake_bluetooth_chooser.mojom.m.js');
bluetooth.mojom = await import(
'/gen/device/bluetooth/public/mojom/emulation/fake_bluetooth.mojom.m.js');
const map = MOJO_CHOOSER_EVENT_TYPE_MAP;
const types = content.mojom.ChooserEventType;
map[types.CHOOSER_OPENED] = 'chooser-opened';
map[types.CHOOSER_CLOSED] = 'chooser-closed';
map[types.ADAPTER_REMOVED] = 'adapter-removed';
map[types.ADAPTER_DISABLED] = 'adapter-disabled';
map[types.ADAPTER_ENABLED] = 'adapter-enabled';
map[types.DISCOVERY_FAILED_TO_START] = 'discovery-failed-to-start';
map[types.DISCOVERING] = 'discovering';
map[types.DISCOVERY_IDLE] = 'discovery-idle';
map[types.ADD_OR_UPDATE_DEVICE] = 'add-or-update-device';
// If this line fails, it means that current environment does not support the
// Web Bluetooth Test API.
try {
navigator.bluetooth.test = new FakeBluetooth();
} catch {
throw 'Web Bluetooth Test API is not implemented on this ' +
'environment. See the bluetooth README at ' +
'https://github.com/web-platform-tests/wpt/blob/master/bluetooth/README.md#web-bluetooth-testing';
}
}
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