1 files changed, 629 insertions, 0 deletions
diff --git a/testing/web-platform/tests/resources/chromium/web-bluetooth-test.js b/testing/web-platform/tests/resources/chromium/web-bluetooth-test.js
new file mode 100644
index 0000000000..ecea5e760c
--- /dev/null
+++ b/testing/web-platform/tests/resources/chromium/web-bluetooth-test.js
@@ -0,0 +1,629 @@
+'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/test/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';
+  }
+}