Add unit test for AudioBus::CreateWrapper()

media/base/audio_bus_unittest.cc

 // Copyright (c) 2012 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 <limits>
 #include <memory>
 
@@ skipping 114 matching lines @@
 
 // Verify Create(...) using AudioParameters works as advertised.
 TEST_F(AudioBusTest, CreateUsingAudioParameters) {
   std::unique_ptr<AudioBus> bus = AudioBus::Create(
       AudioParameters(AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout,
                       kSampleRate, 32, kFrameCount));
   VerifyChannelAndFrameCount(bus.get());
   VerifyReadWriteAndAlignment(bus.get());
 }
 
+// Verify an AudioBus created via CreateWrapper(...) works as advertised.
+TEST_F(AudioBusTest, CreateWrapper) {
+  data_.reserve(kChannels);
+  for (int i = 0; i < kChannels; ++i) {
+    data_.push_back(static_cast<float*>(base::AlignedAlloc(
+        sizeof(*data_[i]) * kFrameCount, AudioBus::kChannelAlignment)));
+  }
+
+  std::unique_ptr<AudioBus> bus = AudioBus::CreateWrapper(kChannels);
+  bus->set_frames(kFrameCount);
+  for (int i = 0; i < bus->channels(); ++i)
+    bus->SetChannelData(i, data_[i]);
+
+  VerifyChannelAndFrameCount(bus.get());
+  VerifyReadWriteAndAlignment(bus.get());
+}
+
 // Verify an AudioBus created via wrapping a vector works as advertised.
 TEST_F(AudioBusTest, WrapVector) {
   data_.reserve(kChannels);
   for (int i = 0; i < kChannels; ++i) {
     data_.push_back(static_cast<float*>(base::AlignedAlloc(
         sizeof(*data_[i]) * kFrameCount, AudioBus::kChannelAlignment)));
   }
 
   std::unique_ptr<AudioBus> bus = AudioBus::WrapVector(kFrameCount, data_);
   VerifyChannelAndFrameCount(bus.get());
@@ skipping 514 matching lines @@
 
   // Verify zero volume case.
   bus->Scale(0);
   for (int i = 0; i < bus->channels(); ++i) {
     SCOPED_TRACE("Zero Scale");
     VerifyArrayIsFilledWithValue(bus->channel(i), bus->frames(), 0);
   }
 }
 
 }  // namespace media