bluetooth: android: Confirm the notify session after the descriptor has been written.

device/bluetooth/bluetooth_gatt_descriptor_unittest.cc

Index: device/bluetooth/bluetooth_gatt_descriptor_unittest.cc
diff --git a/device/bluetooth/bluetooth_gatt_descriptor_unittest.cc b/device/bluetooth/bluetooth_gatt_descriptor_unittest.cc
index a2c0bd97ad53323f58e14c7cc0a6c1db9eff321a..190de7dbc645ed2a8f7ad6a362cec889351f922d 100644
--- a/device/bluetooth/bluetooth_gatt_descriptor_unittest.cc
+++ b/device/bluetooth/bluetooth_gatt_descriptor_unittest.cc
@@ -16,7 +16,42 @@
 namespace device {
 
 #if defined(OS_ANDROID) || defined(OS_MACOSX)
-class BluetoothGattDescriptorTest : public BluetoothTest {};
+class BluetoothGattDescriptorTest : public BluetoothTest {
+ public:
+  // Creates adapter_, device_, service_, characteristic_,
+  // descriptor1_, & descriptor2_.
+  void FakeDescriptorBoilerplate() {
+    InitWithFakeAdapter();
+    StartLowEnergyDiscoverySession();
+    device_ = DiscoverLowEnergyDevice(3);
+    device_->CreateGattConnection(GetGattConnectionCallback(Call::EXPECTED),
+                                  GetConnectErrorCallback(Call::NOT_EXPECTED));
+    SimulateGattConnection(device_);
+    std::vector<std::string> services;
+    std::string uuid("00000000-0000-1000-8000-00805f9b34fb");
+    services.push_back(uuid);
+    SimulateGattServicesDiscovered(device_, services);
+    ASSERT_EQ(1u, device_->GetGattServices().size());
+    service_ = device_->GetGattServices()[0];
+    SimulateGattCharacteristic(service_, uuid, 0);
+    ASSERT_EQ(1u, service_->GetCharacteristics().size());
+    characteristic_ = service_->GetCharacteristics()[0];
+    SimulateGattDescriptor(characteristic_,
+                           "00000001-0000-1000-8000-00805f9b34fb");
+    SimulateGattDescriptor(characteristic_,
+                           "00000002-0000-1000-8000-00805f9b34fb");
+    ASSERT_EQ(2u, characteristic_->GetDescriptors().size());
+    descriptor1_ = characteristic_->GetDescriptors()[0];
+    descriptor2_ = characteristic_->GetDescriptors()[1];
+    ResetEventCounts();
+  }
+
+  BluetoothDevice* device_ = nullptr;
+  BluetoothGattService* service_ = nullptr;
+  BluetoothGattCharacteristic* characteristic_ = nullptr;
+  BluetoothGattDescriptor* descriptor1_ = nullptr;
+  BluetoothGattDescriptor* descriptor2_ = nullptr;
+};
 #endif
 
 #if defined(OS_ANDROID)
@@ -137,4 +172,425 @@ TEST_F(BluetoothGattDescriptorTest, GetUUID) {
 }
 #endif  // defined(OS_ANDROID)
 
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor and GetValue with empty value buffer.
+TEST_F(BluetoothGattDescriptorTest, ReadRemoteDescriptor_Empty) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_read_descriptor_attempts_);
+  std::vector<uint8_t> empty_vector;
+  SimulateGattDescriptorRead(descriptor1_, empty_vector);
+
+  // Duplicate read reported from OS shouldn't cause a problem:
+  SimulateGattDescriptorRead(descriptor1_, empty_vector);
+
+  EXPECT_EQ(empty_vector, last_read_value_);
+  EXPECT_EQ(empty_vector, descriptor1_->GetValue());
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor with empty value buffer.
+TEST_F(BluetoothGattDescriptorTest, WriteRemoteDescriptor_Empty) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  std::vector<uint8_t> empty_vector;
+  descriptor1_->WriteRemoteDescriptor(empty_vector, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_write_descriptor_attempts_);
+  SimulateGattDescriptorWrite(descriptor1_);

[ortuno, 2016/03/04 17:39:47]

Shouldn't we test that duplicated write reported doesn't cause any troubles?

[scheib, 2016/03/11 03:17:30]

Done.

+
+  EXPECT_EQ(empty_vector, last_write_value_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor completing after Chrome objects are deleted.
+TEST_F(BluetoothGattDescriptorTest, ReadRemoteDescriptor_AfterDeleted) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::NOT_EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+
+  RememberDescriptorForSubsequentAction(descriptor1_);
+  DeleteDevice(device_);

[ortuno, 2016/03/04 17:39:47]

I wonder if we should explicitly delete the descriptor. Otherwise we might miss
bugs because the chain of deletions has a bug. Also we have no tests to make
sure deleting the characteristic deletes its children.

[scheib, 2016/03/11 03:17:31]

We don't test deletions of GATT objects yet. Android doesn't support a service
change and there's an issue for that:
https://bugs.chromium.org/p/chromium/issues/detail?id=576906
I'm not thinking of a good way to test a bug in the test framework's
DeleteDevice and chain of our bluetooth object deletion other than memory leak
detection. No good hooks for that. I think the right solution is to wait for
576906. I've noted at these points that we should update tests to delete objects
more narrowly.

+
+  std::vector<uint8_t> empty_vector;
+  SimulateGattDescriptorRead(/* use remembered descriptor */ nullptr,
+                             empty_vector);
+  EXPECT_TRUE("Did not crash!");
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor completing after Chrome objects are deleted.
+TEST_F(BluetoothGattDescriptorTest, WriteRemoteDescriptor_AfterDeleted) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  std::vector<uint8_t> empty_vector;
+  descriptor1_->WriteRemoteDescriptor(empty_vector,
+                                      GetCallback(Call::NOT_EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+
+  RememberDescriptorForSubsequentAction(descriptor1_);
+  DeleteDevice(device_);
+
+  SimulateGattDescriptorWrite(/* use remembered descriptor */ nullptr);
+  EXPECT_TRUE("Did not crash!");
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor and GetValue with non-empty value buffer.
+TEST_F(BluetoothGattDescriptorTest, ReadRemoteDescriptor) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_read_descriptor_attempts_);
+
+  uint8_t values[] = {0, 1, 2, 3, 4, 0xf, 0xf0, 0xff};
+  std::vector<uint8_t> test_vector(values, values + arraysize(values));
+  SimulateGattDescriptorRead(descriptor1_, test_vector);
+
+  // Duplicate read reported from OS shouldn't cause a problem:
+  std::vector<uint8_t> empty_vector;
+  SimulateGattDescriptorRead(descriptor1_, empty_vector);
+
+  EXPECT_EQ(test_vector, last_read_value_);
+  EXPECT_EQ(test_vector, descriptor1_->GetValue());
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor with non-empty value buffer.
+TEST_F(BluetoothGattDescriptorTest, WriteRemoteDescriptor) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  uint8_t values[] = {0, 1, 2, 3, 4, 0xf, 0xf0, 0xff};
+  std::vector<uint8_t> test_vector(values, values + arraysize(values));
+  descriptor1_->WriteRemoteDescriptor(test_vector, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_write_descriptor_attempts_);
+
+  SimulateGattDescriptorWrite(descriptor1_);
+
+  EXPECT_EQ(test_vector, last_write_value_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor and GetValue multiple times.
+TEST_F(BluetoothGattDescriptorTest, ReadRemoteDescriptor_Twice) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_read_descriptor_attempts_);
+
+  uint8_t values[] = {0, 1, 2, 3, 4, 0xf, 0xf0, 0xff};
+  std::vector<uint8_t> test_vector(values, values + arraysize(values));
+  SimulateGattDescriptorRead(descriptor1_, test_vector);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+  EXPECT_EQ(test_vector, last_read_value_);
+  EXPECT_EQ(test_vector, descriptor1_->GetValue());
+
+  // Read again, with different value:
+  ResetEventCounts();
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_read_descriptor_attempts_);
+  std::vector<uint8_t> empty_vector;
+  SimulateGattDescriptorRead(descriptor1_, empty_vector);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+  EXPECT_EQ(empty_vector, last_read_value_);
+  EXPECT_EQ(empty_vector, descriptor1_->GetValue());
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor multiple times.
+TEST_F(BluetoothGattDescriptorTest, WriteRemoteDescriptor_Twice) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  uint8_t values[] = {0, 1, 2, 3, 4, 0xf, 0xf0, 0xff};
+  std::vector<uint8_t> test_vector(values, values + arraysize(values));
+  descriptor1_->WriteRemoteDescriptor(test_vector, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_write_descriptor_attempts_);
+
+  SimulateGattDescriptorWrite(descriptor1_);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+  EXPECT_EQ(test_vector, last_write_value_);
+
+  // Write again, with different value:
+  ResetEventCounts();
+  std::vector<uint8_t> empty_vector;
+  descriptor1_->WriteRemoteDescriptor(empty_vector, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_write_descriptor_attempts_);
+  SimulateGattDescriptorWrite(descriptor1_);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+  EXPECT_EQ(empty_vector, last_write_value_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor on two descriptors.
+TEST_F(BluetoothGattDescriptorTest, ReadRemoteDescriptor_MultipleDescriptors) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  descriptor2_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(2, gatt_read_descriptor_attempts_);
+  EXPECT_EQ(0, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+
+  std::vector<uint8_t> test_vector1;
+  test_vector1.push_back(111);
+  SimulateGattDescriptorRead(descriptor1_, test_vector1);
+  EXPECT_EQ(test_vector1, last_read_value_);
+
+  std::vector<uint8_t> test_vector2;
+  test_vector2.push_back(222);
+  SimulateGattDescriptorRead(descriptor2_, test_vector2);
+  EXPECT_EQ(test_vector2, last_read_value_);
+
+  EXPECT_EQ(2, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+  EXPECT_EQ(test_vector1, descriptor1_->GetValue());
+  EXPECT_EQ(test_vector2, descriptor2_->GetValue());
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor on two descriptors.
+TEST_F(BluetoothGattDescriptorTest, WriteRemoteDescriptor_MultipleDescriptors) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  std::vector<uint8_t> test_vector1;
+  test_vector1.push_back(111);
+  descriptor1_->WriteRemoteDescriptor(test_vector1, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(test_vector1, last_write_value_);
+
+  std::vector<uint8_t> test_vector2;
+  test_vector2.push_back(222);
+  descriptor2_->WriteRemoteDescriptor(test_vector2, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(test_vector2, last_write_value_);
+
+  EXPECT_EQ(2, gatt_write_descriptor_attempts_);
+  EXPECT_EQ(0, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+
+  SimulateGattDescriptorWrite(descriptor1_);
+  SimulateGattDescriptorWrite(descriptor2_);
+
+  EXPECT_EQ(2, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor asynchronous error.
+TEST_F(BluetoothGattDescriptorTest, ReadError) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::NOT_EXPECTED),
+                                     GetGattErrorCallback(Call::EXPECTED));
+  SimulateGattDescriptorReadError(
+      descriptor1_, BluetoothGattService::GATT_ERROR_INVALID_LENGTH);
+  SimulateGattDescriptorReadError(descriptor1_,
+                                  BluetoothGattService::GATT_ERROR_FAILED);
+  EXPECT_EQ(BluetoothGattService::GATT_ERROR_INVALID_LENGTH,
+            last_gatt_error_code_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor asynchronous error.
+TEST_F(BluetoothGattDescriptorTest, WriteError) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  std::vector<uint8_t> empty_vector;
+  descriptor1_->WriteRemoteDescriptor(empty_vector,
+                                      GetCallback(Call::NOT_EXPECTED),
+                                      GetGattErrorCallback(Call::EXPECTED));
+  SimulateGattDescriptorWriteError(
+      descriptor1_, BluetoothGattService::GATT_ERROR_INVALID_LENGTH);
+  SimulateGattDescriptorWriteError(descriptor1_,
+                                   BluetoothGattService::GATT_ERROR_FAILED);
+
+  EXPECT_EQ(BluetoothGattService::GATT_ERROR_INVALID_LENGTH,
+            last_gatt_error_code_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor synchronous error.
+TEST_F(BluetoothGattDescriptorTest, ReadSynchronousError) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  SimulateGattDescriptorReadWillFailSynchronouslyOnce(descriptor1_);
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::NOT_EXPECTED),
+                                     GetGattErrorCallback(Call::EXPECTED));
+  EXPECT_EQ(0, gatt_read_descriptor_attempts_);
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(0, callback_count_);
+  EXPECT_EQ(1, error_callback_count_);
+  EXPECT_EQ(BluetoothGattService::GATT_ERROR_FAILED, last_gatt_error_code_);
+
+  // After failing once, can succeed:
+  ResetEventCounts();
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_read_descriptor_attempts_);
+  std::vector<uint8_t> empty_vector;
+  SimulateGattDescriptorRead(descriptor1_, empty_vector);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor synchronous error.
+TEST_F(BluetoothGattDescriptorTest, WriteSynchronousError) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  SimulateGattDescriptorWriteWillFailSynchronouslyOnce(descriptor1_);
+  std::vector<uint8_t> empty_vector;
+  descriptor1_->WriteRemoteDescriptor(empty_vector,
+                                      GetCallback(Call::NOT_EXPECTED),
+                                      GetGattErrorCallback(Call::EXPECTED));
+  EXPECT_EQ(0, gatt_write_descriptor_attempts_);
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(0, callback_count_);
+  EXPECT_EQ(1, error_callback_count_);
+  EXPECT_EQ(BluetoothGattService::GATT_ERROR_FAILED, last_gatt_error_code_);
+
+  // After failing once, can succeed:
+  ResetEventCounts();
+  descriptor1_->WriteRemoteDescriptor(empty_vector, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  EXPECT_EQ(1, gatt_write_descriptor_attempts_);
+  SimulateGattDescriptorWrite(descriptor1_);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor error with a pending read operation.
+TEST_F(BluetoothGattDescriptorTest, ReadRemoteDescriptor_ReadPending) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::NOT_EXPECTED),
+                                     GetGattErrorCallback(Call::EXPECTED));
+
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_EQ(0, callback_count_);
+  EXPECT_EQ(1, error_callback_count_);
+  EXPECT_EQ(BluetoothGattService::GATT_ERROR_IN_PROGRESS,
+            last_gatt_error_code_);
+
+  // Initial read should still succeed:
+  ResetEventCounts();
+  std::vector<uint8_t> empty_vector;
+  SimulateGattDescriptorRead(descriptor1_, empty_vector);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor error with a pending write operation.
+TEST_F(BluetoothGattDescriptorTest, WriteRemoteDescriptor_WritePending) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  std::vector<uint8_t> empty_vector;
+  descriptor1_->WriteRemoteDescriptor(empty_vector, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  descriptor1_->WriteRemoteDescriptor(empty_vector,
+                                      GetCallback(Call::NOT_EXPECTED),
+                                      GetGattErrorCallback(Call::EXPECTED));
+
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_EQ(0, callback_count_);
+  EXPECT_EQ(1, error_callback_count_);
+  EXPECT_EQ(BluetoothGattService::GATT_ERROR_IN_PROGRESS,
+            last_gatt_error_code_);
+
+  // Initial write should still succeed:
+  ResetEventCounts();
+  SimulateGattDescriptorWrite(descriptor1_);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests ReadRemoteDescriptor error with a pending write operation.
+TEST_F(BluetoothGattDescriptorTest, ReadRemoteDescriptor_WritePending) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  std::vector<uint8_t> empty_vector;
+  descriptor1_->WriteRemoteDescriptor(empty_vector, GetCallback(Call::EXPECTED),
+                                      GetGattErrorCallback(Call::NOT_EXPECTED));
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::NOT_EXPECTED),
+                                     GetGattErrorCallback(Call::EXPECTED));
+
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_EQ(0, callback_count_);
+  EXPECT_EQ(1, error_callback_count_);
+  EXPECT_EQ(BluetoothGattService::GATT_ERROR_IN_PROGRESS,
+            last_gatt_error_code_);
+
+  // Initial write should still succeed:
+  ResetEventCounts();
+  SimulateGattDescriptorWrite(descriptor1_);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+}
+#endif  // defined(OS_ANDROID)
+
+#if defined(OS_ANDROID)
+// Tests WriteRemoteDescriptor error with a pending Read operation.
+TEST_F(BluetoothGattDescriptorTest, WriteRemoteDescriptor_ReadPending) {
+  ASSERT_NO_FATAL_FAILURE(FakeDescriptorBoilerplate());
+
+  std::vector<uint8_t> empty_vector;
+  descriptor1_->ReadRemoteDescriptor(GetReadValueCallback(Call::EXPECTED),
+                                     GetGattErrorCallback(Call::NOT_EXPECTED));
+  descriptor1_->WriteRemoteDescriptor(empty_vector,
+                                      GetCallback(Call::NOT_EXPECTED),
+                                      GetGattErrorCallback(Call::EXPECTED));
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_EQ(0, callback_count_);
+  EXPECT_EQ(1, error_callback_count_);
+  EXPECT_EQ(BluetoothGattService::GATT_ERROR_IN_PROGRESS,
+            last_gatt_error_code_);
+
+  // Initial read should still succeed:
+  ResetEventCounts();
+  SimulateGattDescriptorRead(descriptor1_, empty_vector);
+  EXPECT_EQ(1, callback_count_);
+  EXPECT_EQ(0, error_callback_count_);
+}
+#endif  // defined(OS_ANDROID)
+
 }  // namespace device