media/cast/transport/frame_id_wrap_helper_test.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <gtest/gtest.h>
   6 #include "media/cast/transport/cast_transport_defines.h"
   7
   8 namespace media {
   9 namespace cast {
  10
  11 class FrameIdWrapHelperTest : public ::testing::Test {
  12  protected:
  13   FrameIdWrapHelperTest() {}
  14   virtual ~FrameIdWrapHelperTest() {}
  15
  16   FrameIdWrapHelper frame_id_wrap_helper_;
  17 };
  18
  19 TEST_F(FrameIdWrapHelperTest, FirstFrame) {
  20   EXPECT_EQ(kStartFrameId, frame_id_wrap_helper_.MapTo32bitsFrameId(255u));
  21 }
  22
  23 TEST_F(FrameIdWrapHelperTest, Rollover) {
  24   uint32 new_frame_id = 0u;
  25   for (int i = 0; i <= 256; ++i) {
  26     new_frame_id = frame_id_wrap_helper_.MapTo32bitsFrameId(
  27         static_cast<uint8>(i));
  28   }
  29   EXPECT_EQ(256u, new_frame_id);
  30 }
  31
  32 TEST_F(FrameIdWrapHelperTest, OutOfOrder) {
  33   uint32 new_frame_id = 0u;
  34   for (int i = 0; i < 255; ++i) {
  35     new_frame_id = frame_id_wrap_helper_.MapTo32bitsFrameId(
  36         static_cast<uint8>(i));
  37   }
  38   EXPECT_EQ(254u, new_frame_id);
  39   new_frame_id = frame_id_wrap_helper_.MapTo32bitsFrameId(0u);
  40   EXPECT_EQ(256u, new_frame_id);
  41   new_frame_id = frame_id_wrap_helper_.MapTo32bitsFrameId(255u);
  42   EXPECT_EQ(255u, new_frame_id);
  43   new_frame_id = frame_id_wrap_helper_.MapTo32bitsFrameId(1u);
  44   EXPECT_EQ(257u, new_frame_id);
  45 }
  46
  47 }  // namespace cast
  48 }  // namespace media