Implementation of network level throttler.

net/base/network_stream_throttler_unittest.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/base/network_stream_throttler.h"
+
+#include <memory>
+
+#include "net/base/request_priority.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+namespace {
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+class NetworkStreamThrottlerTest : public testing::Test,
+                                   NetworkStreamThrottler::Delegate {
+ public:
+  NetworkStreamThrottlerTest()
+      : throttler_(NetworkStreamThrottler::CreateThrottler()) {}
+
+ protected:
+  std::unique_ptr<NetworkStreamThrottler::Throttle> CreateThrottle(
+      net::RequestPriority priority,
+      bool expected_throttle_state) {
+    std::unique_ptr<NetworkStreamThrottler::Throttle> throttle(
+        throttler_->CreateThrottle(this, priority, false));
+    EXPECT_EQ(expected_throttle_state, throttle->IsThrottled());
+    return throttle;
+  }
+
+ private:
+  // NetworkStreamThrottler::Delegate
+  void OnThrottleStateChanged() override { ADD_FAILURE(); }
+
+  std::unique_ptr<NetworkStreamThrottler> throttler_;
+};
+
+// Check to confirm that all created throttles start unthrottled for the
+// current null implementation.
+TEST_F(NetworkStreamThrottlerTest, AllUnthrottled) {
+  for (int i = MINIMUM_PRIORITY; i <= MAXIMUM_PRIORITY; ++i) {
+    CreateThrottle(static_cast<RequestPriority>(i), false);
+  }
+}
+
+}  // namespace
+
+}  // namespace net