Relanding: Allow the DTLS fingerprint verification to occur after the handshake.

webrtc/base/buffer_unittest.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 339 matching lines @@
   EXPECT_NE(buf.data(), nullptr);
   BufferT<BloodStone*> buf2(4);
   for (size_t i = 0; i < buf2.size(); ++i) {
     buf2[i] = &buf[i];
   }
   static const char kObsidian[] = "obsidian";
   buf2[2]->stone = kObsidian;
   EXPECT_EQ(kObsidian, buf[2].stone);
 }
 
+TEST(BufferTest, TestEmpty) {
+  Buffer buf;
+  EXPECT_TRUE(buf.empty());
+  buf.SetData(kTestData, 15);
+  EXPECT_FALSE(buf.empty());
+  buf.Clear();
+  EXPECT_TRUE(buf.empty());
+}
+
 }  // namespace rtc