Introduce ExpectApproxEq, a helper function that allows making assertions that certain values are e…

net/quic/test_tools/quic_test_utils_test.cc

+// Copyright 2016 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/test_tools/quic_test_utils.h"
+
+#include "testing/gtest/include/gtest/gtest-spi.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+namespace test {
+
+TEST(QuicTestUtilsTest, BasicApproxEq) {
+  ExpectApproxEq(10, 10, 1e-6f);
+  ExpectApproxEq(1000, 1001, 0.01f);
+  EXPECT_NONFATAL_FAILURE(ExpectApproxEq(1000, 1100, 0.01f), "");
+
+  ExpectApproxEq(64, 31, 0.55f);
+  EXPECT_NONFATAL_FAILURE(ExpectApproxEq(31, 64, 0.55f), "");
+}
+
+TEST(QuicTestUtilsTest, QuicTimeDelta) {
+  ExpectApproxEq(QuicTime::Delta::FromMicroseconds(1000),
+                 QuicTime::Delta::FromMicroseconds(1003), 0.01f);
+  EXPECT_NONFATAL_FAILURE(
+      ExpectApproxEq(QuicTime::Delta::FromMicroseconds(1000),
+                     QuicTime::Delta::FromMicroseconds(1200), 0.01f),
+      "");
+}
+
+TEST(QuicTestUtilsTest, QuicBandwidth) {
+  ExpectApproxEq(QuicBandwidth::FromBytesPerSecond(1000),
+                 QuicBandwidth::FromBitsPerSecond(8005), 0.01f);
+  EXPECT_NONFATAL_FAILURE(
+      ExpectApproxEq(QuicBandwidth::FromBytesPerSecond(1000),
+                     QuicBandwidth::FromBitsPerSecond(9005), 0.01f),
+      "");
+}
+
+}  // namespace test
+}  // namespace net