Add RecommendSampleRate to audio config test.

ppapi/tests/test_audio_config.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 "ppapi/tests/test_audio_config.h"
 
 #include "ppapi/c/ppb_audio_config.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/tests/testing_instance.h"
 
@@ skipping 19 matching lines @@
   };
   static const uint32_t kRequestFrameCounts[] = {
     PP_AUDIOMINSAMPLEFRAMECOUNT,
     PP_AUDIOMAXSAMPLEFRAMECOUNT,
     // Include some "okay-looking" frame counts; check their validity below.
     1024,
     2048,
     4096
   };
 
+  // Ask PPB_AudioConfig about the recommended sample rate.

[viettrungluu, 2012/06/15 21:33:17]

Please add a separate test for this ("TestRecommendSampleRate"?).

+  PP_AudioSampleRate sample_rate = audio_config_interface_->RecommendSampleRate(
+      instance_->pp_instance());
+  ASSERT_TRUE(sample_rate == PP_AUDIOSAMPLERATE_NONE ||
+              sample_rate == PP_AUDIOSAMPLERATE_44100 ||
+              sample_rate == PP_AUDIOSAMPLERATE_48000);
+
   for (size_t i = 0; i < sizeof(kSampleRates)/sizeof(kSampleRates[0]); i++) {
     PP_AudioSampleRate sample_rate = kSampleRates[i];
 
     for (size_t j = 0;
          j < sizeof(kRequestFrameCounts)/sizeof(kRequestFrameCounts);
          j++) {
       uint32_t request_frame_count = kRequestFrameCounts[j];
       ASSERT_TRUE(request_frame_count >= PP_AUDIOMINSAMPLEFRAMECOUNT);
       ASSERT_TRUE(request_frame_count <= PP_AUDIOMAXSAMPLEFRAMECOUNT);
 
@@ skipping 37 matching lines @@
       PP_AUDIOMAXSAMPLEFRAMECOUNT + 1u);
   ASSERT_EQ(0, ac);
 
   // Test rest of API whose failure cases are defined.
   ASSERT_FALSE(audio_config_interface_->IsAudioConfig(0));
   ASSERT_EQ(PP_AUDIOSAMPLERATE_NONE, audio_config_interface_->GetSampleRate(0));
   ASSERT_EQ(0u, audio_config_interface_->GetSampleFrameCount(0));
 
   PASS();
 }