device/blueooth: Add BlueZ unit test for BluetoothDevice::SetConnectionInterval.

device/bluetooth/bluez/bluetooth_bluez_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 4558 matching lines @@
   EXPECT_EQ(0x12u, device->GetAdvertisingDataFlags().value());
 
   // Check that we can update advertising data flags.
   properties->advertising_data_flags.ReplaceValue(std::vector<uint8_t>({0x23}));
   EXPECT_EQ(2, observer.device_changed_count());
   EXPECT_EQ(device, observer.last_device());
   EXPECT_TRUE(device->GetAdvertisingDataFlags().has_value());
   EXPECT_EQ(0x23u, device->GetAdvertisingDataFlags().value());
 }
 
+TEST_F(BluetoothBlueZTest, SetConnectionLatency) {
+  GetAdapter();
+  DiscoverDevices();
+
+  // SetConnectionLatency is supported on LE devices.
+  bluez::FakeBluetoothDeviceClient::Properties* properties =
+      fake_bluetooth_device_client_->GetProperties(dbus::ObjectPath(
+          bluez::FakeBluetoothDeviceClient::kConnectUnpairablePath));
+  properties->type.ReplaceValue(BluetoothDeviceClient::kTypeLe);
+  BluetoothDevice* device = adapter_->GetDevice(
+      bluez::FakeBluetoothDeviceClient::kConnectUnpairableAddress);
+  ASSERT_TRUE(device);
+
+  device->SetConnectionLatency(
+      BluetoothDevice::ConnectionLatency::CONNECTION_LATENCY_LOW, GetCallback(),
+      GetErrorCallback());
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+
+  device->SetConnectionLatency(
+      BluetoothDevice::ConnectionLatency::CONNECTION_LATENCY_HIGH,
+      GetCallback(), GetErrorCallback());
+  EXPECT_EQ(2, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+
+  // Dual mode devices should be supported as well.
+  properties->type.ReplaceValue(BluetoothDeviceClient::kTypeDual);
+  device->SetConnectionLatency(
+      BluetoothDevice::ConnectionLatency::CONNECTION_LATENCY_MEDIUM,
+      GetCallback(), GetErrorCallback());
+  EXPECT_EQ(3, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+
+  // This API is not supported for BR/EDR devices.
+  properties->type.ReplaceValue(BluetoothDeviceClient::kTypeBredr);
+  device->SetConnectionLatency(
+      BluetoothDevice::ConnectionLatency::CONNECTION_LATENCY_MEDIUM,
+      GetCallback(), GetErrorCallback());
+  EXPECT_EQ(3, callback_count_);
+  EXPECT_EQ(1, error_callback_count_);
+
+  // Return an error if the type is not valid.
+  properties->type.set_valid(false);
+  device->SetConnectionLatency(
+      BluetoothDevice::ConnectionLatency::CONNECTION_LATENCY_MEDIUM,
+      GetCallback(), GetErrorCallback());
+  EXPECT_EQ(3, callback_count_);
+  EXPECT_EQ(2, error_callback_count_);
+}
+
 }  // namespace bluez