Add the copresence DirectiveHandler.

components/copresence/handlers/audio/audio_directive_list_unittest.cc

+// Copyright 2014 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 "components/copresence/handlers/audio/audio_directive_list.h"
+
+#include <cstdlib>
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "media/base/audio_bus.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace copresence {
+
+class AudioDirectiveListTest : public testing::Test {
+ public:
+  AudioDirectiveListTest()
+      : directive_list_(new AudioDirectiveList(
+            base::Bind(&AudioDirectiveListTest::EncodeToken,
+                       base::Unretained(this)),
+            base::Bind(&AudioDirectiveListTest::DirectiveAdded,

[Daniel Erat, 2014/07/28 21:18:17]

the test doesn't verify that this was called. why not just pass a null callback
here and drop DirectiveAdded?

[rkc, 2014/07/29 00:33:35]

Done.

+                       base::Unretained(this)))) {}
+
+  virtual ~AudioDirectiveListTest() {}
+
+  void DirectiveAdded() {}
+
+ protected:
+  void EncodeToken(const std::string& token,

[Daniel Erat, 2014/07/28 21:18:17]

this looks like it's a copy of the code from
audio_directive_handler_unittest.cc, plus the call to PopulateSamples(). can you
move this into some shared testing library?

[rkc, 2014/07/29 00:33:35]

Done.

+                   const AudioDirectiveList::SamplesCallback& callback) {
+    const int kSamplesSize = 0x1337;
+    scoped_refptr<media::AudioBusRefCounted> samples =
+        media::AudioBusRefCounted::Create(1, kSamplesSize);
+    PopulateSamples(0x1337, kSamplesSize, samples->channel(0));
+    callback.Run(token, samples);
+  }
+
+  // Populate random samples given a random seed into the samples array.
+  void PopulateSamples(int random_seed, size_t size, float* samples) {
+    srand(random_seed);
+    for (size_t i = 0; i < size; ++i)
+      samples[i] = (2.0 * rand() / RAND_MAX) - 1;
+  }
+
+  // This order is important. We want the message loop to get created before
+  // our directive list, since the directive list constructor will post tasks.
+  base::MessageLoop message_loop_;
+  scoped_ptr<AudioDirectiveList> directive_list_;
+};
+
+TEST_F(AudioDirectiveListTest, Basic) {
+  const base::TimeDelta zero_ttl = base::TimeDelta::FromMilliseconds(0);
+  const base::TimeDelta large_ttl = base::TimeDelta::FromSeconds(0x7331);
+
+  directive_list_->AddTransmitDirective("token1", "op_id1", zero_ttl);
+  directive_list_->AddTransmitDirective("token2", "op_id2", large_ttl);
+  directive_list_->AddTransmitDirective("token3", "op_id1", zero_ttl);
+
+  EXPECT_EQ("token2", directive_list_->GetNextTransmit()->token);
+
+  directive_list_->AddReceiveDirective("op_id1", zero_ttl);
+  directive_list_->AddReceiveDirective("op_id3", zero_ttl);
+  directive_list_->AddReceiveDirective("op_id3", large_ttl);
+  directive_list_->AddReceiveDirective("op_id7", zero_ttl);
+
+  EXPECT_EQ("op_id3", directive_list_->GetNextReceive()->op_id);
+}
+
+TEST_F(AudioDirectiveListTest, OutOfOrderAndMultiple) {
+  const base::TimeDelta zero_ttl = base::TimeDelta::FromMilliseconds(0);
+  const base::TimeDelta large_ttl = base::TimeDelta::FromSeconds(0x7331);
+
+  EXPECT_EQ(NULL, directive_list_->GetNextTransmit().get());
+  EXPECT_EQ(NULL, directive_list_->GetNextReceive().get());
+
+  directive_list_->AddTransmitDirective("token1", "op_id1", zero_ttl);
+  directive_list_->AddTransmitDirective("token2", "op_id2", large_ttl);
+  directive_list_->AddTransmitDirective("token3", "op_id1", large_ttl);
+
+  // Should keep getting the directive till it expires or we add a newer one.
+  EXPECT_EQ("token3", directive_list_->GetNextTransmit()->token);
+  EXPECT_EQ("token3", directive_list_->GetNextTransmit()->token);
+  EXPECT_EQ("token3", directive_list_->GetNextTransmit()->token);
+  EXPECT_EQ(NULL, directive_list_->GetNextReceive().get());
+
+  directive_list_->AddReceiveDirective("op_id1", large_ttl);
+  directive_list_->AddReceiveDirective("op_id3", zero_ttl);
+  directive_list_->AddReceiveDirective("op_id3", large_ttl);
+  directive_list_->AddReceiveDirective("op_id7", large_ttl);
+
+  // Should keep getting the directive till it expires or we add a newer one.
+  EXPECT_EQ("op_id7", directive_list_->GetNextReceive()->op_id);
+  EXPECT_EQ("op_id7", directive_list_->GetNextReceive()->op_id);
+  EXPECT_EQ("op_id7", directive_list_->GetNextReceive()->op_id);
+}
+
+}  // namespace copresence