Round results of multiplying QuicBandwidth and QuicTime::Delta rather than truncating. No behavior…

net/quic/core/quic_time_test.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 "net/quic/core/quic_time.h"
 #include "net/quic/test_tools/mock_clock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 namespace test {
@@ skipping 41 matching lines @@
   int i = 2;
   EXPECT_EQ(QuicTime::Delta::FromMicroseconds(4000),
             QuicTime::Delta::FromMilliseconds(2) * i);
   EXPECT_EQ(QuicTime::Delta::FromMicroseconds(4000),
             i * QuicTime::Delta::FromMilliseconds(2));
   double d = 2;
   EXPECT_EQ(QuicTime::Delta::FromMicroseconds(4000),
             QuicTime::Delta::FromMilliseconds(2) * d);
   EXPECT_EQ(QuicTime::Delta::FromMicroseconds(4000),
             d * QuicTime::Delta::FromMilliseconds(2));
+
+  // Ensure we are rounding correctly within a single-bit level of precision.
+  EXPECT_EQ(QuicTime::Delta::FromMicroseconds(5),
+            QuicTime::Delta::FromMicroseconds(9) * 0.5);
+  EXPECT_EQ(QuicTime::Delta::FromMicroseconds(2),
+            QuicTime::Delta::FromMicroseconds(12) * 0.2);
 }
 
 TEST(QuicTimeDeltaTest, Max) {
   EXPECT_EQ(QuicTime::Delta::FromMicroseconds(2000),
             std::max(QuicTime::Delta::FromMicroseconds(1000),
                      QuicTime::Delta::FromMicroseconds(2000)));
 }
 
 TEST(QuicTimeDeltaTest, NotEqual) {
   EXPECT_TRUE(QuicTime::Delta::FromSeconds(0) !=
@@ skipping 79 matching lines @@
   const QuicTime zero = QuicTime::Zero();
   const QuicTime one = zero + QuicTime::Delta::FromSeconds(1);
   EXPECT_TRUE(zero <= zero);
   EXPECT_TRUE(zero <= one);
   EXPECT_TRUE(one <= one);
   EXPECT_FALSE(one <= zero);
 }
 
 }  // namespace test
 }  // namespace net