bluetooth: android: Initial basic Descriptors implementation.

device/bluetooth/bluetooth_gatt_descriptor_unittest.cc

+// Copyright 2016 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 "base/run_loop.h"
+#include "device/bluetooth/bluetooth_gatt_characteristic.h"
+#include "device/bluetooth/bluetooth_gatt_service.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if defined(OS_ANDROID)
+#include "device/bluetooth/test/bluetooth_test_android.h"
+#elif defined(OS_MACOSX)
+#include "device/bluetooth/test/bluetooth_test_mac.h"
+#endif
+
+namespace device {
+
+#if defined(OS_ANDROID) || defined(OS_MACOSX)
+class BluetoothGattDescriptorTest : public BluetoothTest {};
+#endif
+
+#if defined(OS_ANDROID)
+TEST_F(BluetoothGattDescriptorTest, GetIdentifier) {
+  InitWithFakeAdapter();
+  StartLowEnergyDiscoverySession();
+  // 2 devices to verify unique IDs across them.

[Jeffrey Yasskin, 2016/01/12 21:53:54]

s/verify unique IDs across them/verify that descriptors on them have distinct
IDs/?

[scheib, 2016/01/12 23:16:55]

Done.

+  BluetoothDevice* device1 = DiscoverLowEnergyDevice(3);
+  BluetoothDevice* device2 = DiscoverLowEnergyDevice(4);
+  device1->CreateGattConnection(GetGattConnectionCallback(Call::EXPECTED),
+                                GetConnectErrorCallback(Call::NOT_EXPECTED));
+  device2->CreateGattConnection(GetGattConnectionCallback(Call::EXPECTED),
+                                GetConnectErrorCallback(Call::NOT_EXPECTED));
+  SimulateGattConnection(device1);
+  SimulateGattConnection(device2);
+
+  // 3 services (all with same UUID).
+  //   1 on the first device (to test characteristic instances across devices).
+  //   2 on the second device (to test same device, multiple service instances).
+  std::vector<std::string> services;
+  std::string uuid = "00000000-0000-1000-8000-00805f9b34fb";
+  services.push_back(uuid);
+  SimulateGattServicesDiscovered(device1, services);
+  services.push_back(uuid);
+  SimulateGattServicesDiscovered(device2, services);
+  BluetoothGattService* service1 = device1->GetGattServices()[0];
+  BluetoothGattService* service2 = device2->GetGattServices()[0];
+  BluetoothGattService* service3 = device2->GetGattServices()[1];
+  // 6 characteristics (same UUID), 2 on each service.
+  SimulateGattCharacteristic(service1, uuid, /* properties */ 0);
+  SimulateGattCharacteristic(service1, uuid, /* properties */ 0);
+  SimulateGattCharacteristic(service2, uuid, /* properties */ 0);
+  SimulateGattCharacteristic(service2, uuid, /* properties */ 0);
+  SimulateGattCharacteristic(service3, uuid, /* properties */ 0);
+  SimulateGattCharacteristic(service3, uuid, /* properties */ 0);
+  BluetoothGattCharacteristic* char1 = service1->GetCharacteristics()[0];
+  BluetoothGattCharacteristic* char2 = service1->GetCharacteristics()[1];
+  BluetoothGattCharacteristic* char3 = service2->GetCharacteristics()[0];
+  BluetoothGattCharacteristic* char4 = service2->GetCharacteristics()[1];
+  BluetoothGattCharacteristic* char5 = service3->GetCharacteristics()[0];
+  BluetoothGattCharacteristic* char6 = service3->GetCharacteristics()[1];
+  // 6 descriptors (same UUID), 1 on each characteristic

[Jeffrey Yasskin, 2016/01/12 21:53:54]

The Characteristic Presentation Format descriptor can appear multiple times, but
it looks like the Android API doesn't provide instance IDs for you to use to
distinguish them. :( Could you comment that having duplicate UUIDs be
indistinguishable is a limitation of the Android API?

[scheib, 2016/01/12 23:16:55]

TODOs added to code. Though Android doesn't provide an instance ID - we can
handle this because getDescriptors should return the unique descriptors with
duplicate UUIDs, and we can assign our own instance IDs. I'll leave that for
later, though.

+  SimulateGattDescriptor(char1, uuid);
+  SimulateGattDescriptor(char2, uuid);
+  SimulateGattDescriptor(char3, uuid);
+  SimulateGattDescriptor(char4, uuid);
+  SimulateGattDescriptor(char5, uuid);
+  SimulateGattDescriptor(char6, uuid);
+  BluetoothGattDescriptor* desc1 = char1->GetDescriptors()[0];
+  BluetoothGattDescriptor* desc2 = char2->GetDescriptors()[0];
+  BluetoothGattDescriptor* desc3 = char3->GetDescriptors()[0];
+  BluetoothGattDescriptor* desc4 = char4->GetDescriptors()[0];
+  BluetoothGattDescriptor* desc5 = char5->GetDescriptors()[0];
+  BluetoothGattDescriptor* desc6 = char6->GetDescriptors()[0];
+
+  // All IDs are unique.
+  EXPECT_NE(desc1->GetIdentifier(), desc2->GetIdentifier());
+  EXPECT_NE(desc1->GetIdentifier(), desc3->GetIdentifier());
+  EXPECT_NE(desc1->GetIdentifier(), desc4->GetIdentifier());
+  EXPECT_NE(desc1->GetIdentifier(), desc5->GetIdentifier());
+  EXPECT_NE(desc1->GetIdentifier(), desc6->GetIdentifier());
+
+  EXPECT_NE(desc2->GetIdentifier(), desc3->GetIdentifier());
+  EXPECT_NE(desc2->GetIdentifier(), desc4->GetIdentifier());
+  EXPECT_NE(desc2->GetIdentifier(), desc5->GetIdentifier());
+  EXPECT_NE(desc2->GetIdentifier(), desc6->GetIdentifier());
+
+  EXPECT_NE(desc3->GetIdentifier(), desc4->GetIdentifier());
+  EXPECT_NE(desc3->GetIdentifier(), desc5->GetIdentifier());
+  EXPECT_NE(desc3->GetIdentifier(), desc6->GetIdentifier());
+
+  EXPECT_NE(desc4->GetIdentifier(), desc5->GetIdentifier());
+  EXPECT_NE(desc4->GetIdentifier(), desc6->GetIdentifier());
+
+  EXPECT_NE(desc5->GetIdentifier(), desc6->GetIdentifier());
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+TEST_F(BluetoothGattDescriptorTest, GetUUID) {
+  InitWithFakeAdapter();
+  StartLowEnergyDiscoverySession();
+  BluetoothDevice* device = DiscoverLowEnergyDevice(3);
+  device->CreateGattConnection(GetGattConnectionCallback(Call::EXPECTED),
+                               GetConnectErrorCallback(Call::NOT_EXPECTED));
+  SimulateGattConnection(device);
+  std::vector<std::string> services;
+  services.push_back("00000000-0000-1000-8000-00805f9b34fb");
+  SimulateGattServicesDiscovered(device, services);
+  ASSERT_EQ(1u, device->GetGattServices().size());
+  BluetoothGattService* service = device->GetGattServices()[0];
+
+  SimulateGattCharacteristic(service, "00000000-0000-1000-8000-00805f9b34fb",
+                             /* properties */ 0);
+  ASSERT_EQ(1u, service->GetCharacteristics().size());
+  BluetoothGattCharacteristic* characteristic =
+      service->GetCharacteristics()[0];
+
+  // Create 2 descriptors.
+  std::string uuid_str1("11111111-0000-1000-8000-00805f9b34fb");
+  std::string uuid_str2("22222222-0000-1000-8000-00805f9b34fb");
+  BluetoothUUID uuid1(uuid_str1);
+  BluetoothUUID uuid2(uuid_str2);
+  SimulateGattDescriptor(characteristic, uuid_str1);
+  SimulateGattDescriptor(characteristic, uuid_str2);
+  ASSERT_EQ(2u, characteristic->GetDescriptors().size());
+  BluetoothGattDescriptor* descriptor1 = characteristic->GetDescriptors()[0];
+  BluetoothGattDescriptor* descriptor2 = characteristic->GetDescriptors()[1];
+
+  // Swap as needed to have descriptor1 be the one with uuid1.
+  if (descriptor2->GetUUID() == uuid1)
+    std::swap(descriptor1, descriptor2);
+
+  EXPECT_EQ(uuid1, descriptor1->GetUUID());
+  EXPECT_EQ(uuid2, descriptor2->GetUUID());
+}
+#endif  // defined(OS_ANDROID)
+
+}  // namespace device