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// Copyright 2015 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/url_request/url_request_backoff_manager.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/stringprintf.h"
#include "base/time/time.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
class URLRequestBackoffManagerTest : public testing::Test {
protected:
URLRequestBackoffManagerTest() : manager_(new URLRequestBackoffManager) {}
void RegisterURL(const GURL& url,
int backoff_in_sec,
const base::Time& request_time) {
std::string raw_headers = base::StringPrintf(
"HTTP/1.0 200 OK\n"
"backoff: %d\n\n",
backoff_in_sec);
scoped_refptr<HttpResponseHeaders> headers(new HttpResponseHeaders(
HttpUtil::AssembleRawHeaders(raw_headers.c_str(), raw_headers.size())));
manager_->UpdateWithResponse(url, headers.get(), request_time);
}
scoped_ptr<URLRequestBackoffManager> manager_;
};
} // namespace
TEST_F(URLRequestBackoffManagerTest, ShouldRejectRequest) {
base::Time request_time = base::Time::Now();
RegisterURL(GURL("https://example.com"), 3600, request_time);
ASSERT_EQ(1, manager_->GetNumberOfEntriesForTests());
ASSERT_TRUE(manager_->ShouldRejectRequest(
GURL("https://example.com?q=v"),
request_time + base::TimeDelta::FromSeconds(3500)));
// Only can try once in the interval of
// [|request_time| + 3600, |request_time| + 3600 * 1.1).
ASSERT_FALSE(manager_->ShouldRejectRequest(
GURL("https://example.com?q=v"),
request_time + base::TimeDelta::FromSeconds(3700)));
ASSERT_TRUE(manager_->ShouldRejectRequest(
GURL("https://example.com?q=v"),
request_time + base::TimeDelta::FromSeconds(3700)));
ASSERT_EQ(1, manager_->GetNumberOfEntriesForTests());
// After release time, throttling should not be applied.
ASSERT_FALSE(manager_->ShouldRejectRequest(
GURL("https://example.com?q=v"),
request_time + base::TimeDelta::FromSeconds(3960)));
}
TEST_F(URLRequestBackoffManagerTest, MisconfiguredHeaders) {
// Backoff time is smaller than the minimum allowed.
RegisterURL(GURL("https://example.com"),
URLRequestBackoffManager::kMinimumBackoffInSeconds - 1,
base::Time::Now());
ASSERT_EQ(0, manager_->GetNumberOfEntriesForTests());
// Backoff time is bigger than the maximum allowed.
RegisterURL(GURL("https://example.com"),
URLRequestBackoffManager::kMaximumBackoffInSeconds + 1,
base::Time::Now());
ASSERT_EQ(0, manager_->GetNumberOfEntriesForTests());
}
TEST_F(URLRequestBackoffManagerTest, ShouldGarbageCollect) {
base::Time request_time =
base::Time::Now() - base::TimeDelta::FromSeconds(60);
for (int i = 0;
i < URLRequestBackoffManager::kNewEntriesBetweenCollecting - 1; i++) {
RegisterURL(GURL(base::StringPrintf("http://example%d.com", i)), 10,
request_time);
ASSERT_EQ(i + 1, manager_->GetNumberOfEntriesForTests());
}
// Should clear all previous outdated entries.
RegisterURL(GURL("http://example.com"), 10, base::Time::Now());
ASSERT_EQ(1, manager_->GetNumberOfEntriesForTests());
}
TEST_F(URLRequestBackoffManagerTest, ClearOnNetworkChange) {
for (int i = 0; i < 3; ++i) {
RegisterURL(GURL("http://www.example.com/"), 60, base::Time::Now());
ASSERT_EQ(1, manager_->GetNumberOfEntriesForTests());
EXPECT_TRUE(manager_->ShouldRejectRequest(GURL("http://www.example.com/"),
base::Time::Now()));
switch (i) {
case 0:
manager_->OnIPAddressChanged();
break;
case 1:
manager_->OnConnectionTypeChanged(
NetworkChangeNotifier::CONNECTION_UNKNOWN);
break;
case 2:
manager_->OnConnectionTypeChanged(
NetworkChangeNotifier::CONNECTION_NONE);
break;
default:
FAIL();
}
EXPECT_FALSE(manager_->ShouldRejectRequest(GURL("http://www.example.com/"),
base::Time::Now()));
ASSERT_EQ(0, manager_->GetNumberOfEntriesForTests());
}
}
} // namespace net
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