gfe-relnote: (n/a) Add QuicBandwidth::IsInfinite(). Not used yet.

PiperOrigin-RevId: 247668009
Change-Id: Ie60f8c6d5cd2b53bf01586d2bab814a810cc5eda

quic/core/quic_bandwidth.h

diff --git a/quic/core/quic_bandwidth.h b/quic/core/quic_bandwidth.h
index 5b74744..fe043b0 100644
--- a/quic/core/quic_bandwidth.h
+++ b/quic/core/quic_bandwidth.h
@@ -77,6 +77,9 @@
   }
 
   inline bool IsZero() const { return bits_per_second_ == 0; }
+  inline bool IsInfinite() const {
+    return bits_per_second_ == Infinite().ToBitsPerSecond();
+  }
 
   inline QuicTime::Delta TransferTime(QuicByteCount bytes) const {
     if (bits_per_second_ == 0) {

quic/core/quic_bandwidth_test.cc

diff --git a/quic/core/quic_bandwidth_test.cc b/quic/core/quic_bandwidth_test.cc
index ed23dac..7f9535e 100644
--- a/quic/core/quic_bandwidth_test.cc
+++ b/quic/core/quic_bandwidth_test.cc
@@ -3,6 +3,9 @@
 // found in the LICENSE file.
 
 #include "net/third_party/quiche/src/quic/core/quic_bandwidth.h"
+
+#include <limits>
+
 #include "net/third_party/quiche/src/quic/core/quic_time.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
 
@@ -118,5 +121,17 @@
   EXPECT_EQ("400.00 Gbits/s (50.00 Gbytes/s)", bandwidth.ToDebugValue());
 }
 
+TEST_F(QuicBandwidthTest, SpecialValues) {
+  EXPECT_EQ(0, QuicBandwidth::Zero().ToBitsPerSecond());
+  EXPECT_EQ(std::numeric_limits<int64_t>::max(),
+            QuicBandwidth::Infinite().ToBitsPerSecond());
+
+  EXPECT_TRUE(QuicBandwidth::Zero().IsZero());
+  EXPECT_FALSE(QuicBandwidth::Zero().IsInfinite());
+
+  EXPECT_TRUE(QuicBandwidth::Infinite().IsInfinite());
+  EXPECT_FALSE(QuicBandwidth::Infinite().IsZero());
+}
+
 }  // namespace test
 }  // namespace quic