Rename Dns prefetching files to Predictor files...

chrome/browser/net/dns_host_info_unittest.cc

-// Copyright (c) 2006-2010 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.
-
-// Single threaded tests of UrlInfo functionality.
-
-#include <time.h>
-#include <string>
-
-#include "base/platform_thread.h"
-#include "chrome/browser/net/dns_host_info.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using base::TimeDelta;
-
-namespace {
-
-class DnsHostInfoTest : public testing::Test {
-};
-
-typedef chrome_browser_net::UrlInfo UrlInfo;
-
-TEST(DnsHostInfoTest, StateChangeTest) {
-  UrlInfo info_practice, info;
-  GURL url1("http://domain1.com:80"), url2("https://domain2.com:443");
-
-  // First load DLL, so that their load time won't interfere with tests.
-  // Some tests involve timing function performance, and DLL time can overwhelm
-  // test durations (which are considering network vs cache response times).
-  info_practice.SetUrl(url2);
-  info_practice.SetQueuedState(UrlInfo::UNIT_TEST_MOTIVATED);
-  info_practice.SetAssignedState();
-  info_practice.SetFoundState();
-  PlatformThread::Sleep(500);  // Allow time for DLLs to fully load.
-
-  // Complete the construction of real test object.
-  info.SetUrl(url1);
-
-  EXPECT_TRUE(info.NeedsDnsUpdate()) << "error in construction state";
-  info.SetQueuedState(UrlInfo::UNIT_TEST_MOTIVATED);
-  EXPECT_FALSE(info.NeedsDnsUpdate())
-    << "update needed after being queued";
-  info.SetAssignedState();
-  EXPECT_FALSE(info.NeedsDnsUpdate());
-  info.SetFoundState();
-  EXPECT_FALSE(info.NeedsDnsUpdate())
-    << "default expiration time is TOOOOO short";
-
-  // Note that time from ASSIGNED to FOUND was VERY short (probably 0ms), so the
-  // object should conclude that no network activity was needed.  As a result,
-  // the required time till expiration will be halved (guessing that we were
-  // half way through having the cache expire when we did the lookup.
-  EXPECT_LT(info.resolve_duration().InMilliseconds(),
-    UrlInfo::kMaxNonNetworkDnsLookupDuration.InMilliseconds())
-    << "Non-net time is set too low";
-
-  info.set_cache_expiration(TimeDelta::FromMilliseconds(300));
-  EXPECT_FALSE(info.NeedsDnsUpdate()) << "expiration time not honored";
-  PlatformThread::Sleep(80);  // Not enough time to pass our 300ms mark.
-  EXPECT_FALSE(info.NeedsDnsUpdate()) << "expiration time not honored";
-
-  // That was a nice life when the object was found.... but next time it won't
-  // be found.  We'll sleep for a while, and then come back with not-found.
-  info.SetQueuedState(UrlInfo::UNIT_TEST_MOTIVATED);
-  info.SetAssignedState();
-  EXPECT_FALSE(info.NeedsDnsUpdate());
-  // Greater than minimal expected network latency on DNS lookup.
-  PlatformThread::Sleep(25);
-  info.SetNoSuchNameState();
-  EXPECT_FALSE(info.NeedsDnsUpdate())
-    << "default expiration time is TOOOOO short";
-
-  // Note that now we'll actually utilize an expiration of 300ms,
-  // since there was detected network activity time during lookup.
-  // We're assuming the caching just started with our lookup.
-  PlatformThread::Sleep(80);  // Not enough time to pass our 300ms mark.
-  EXPECT_FALSE(info.NeedsDnsUpdate()) << "expiration time not honored";
-  // Still not past our 300ms mark (only about 4+2ms)
-  PlatformThread::Sleep(80);
-  EXPECT_FALSE(info.NeedsDnsUpdate()) << "expiration time not honored";
-  PlatformThread::Sleep(150);
-  EXPECT_TRUE(info.NeedsDnsUpdate()) << "expiration time not honored";
-}
-
-// When a system gets "congested" relative to DNS, it means it is doing too many
-// DNS resolutions, and bogging down the system.  When we detect such a
-// situation, we divert the sequence of states a UrlInfo instance moves
-// through.  Rather than proceeding from QUEUED (waiting in a name queue for a
-// worker thread that can resolve the name) to ASSIGNED (where a worker thread
-// actively resolves the name), we enter the ASSIGNED state (without actually
-// getting sent to a resolver thread) and reset our state to what it was before
-// the corresponding name was put in the work_queue_.  This test drives through
-// the state transitions used in such congestion handling.
-TEST(DnsHostInfoTest, CongestionResetStateTest) {
-  UrlInfo info;
-  GURL url("http://domain1.com:80");
-
-  info.SetUrl(url);
-  info.SetQueuedState(UrlInfo::UNIT_TEST_MOTIVATED);
-  info.SetAssignedState();
-  EXPECT_TRUE(info.is_assigned());
-
-  info.RemoveFromQueue();  // Do the reset.
-  EXPECT_FALSE(info.is_assigned());
-
-  // Since this was a new info instance, and it never got resolved, we land back
-  // in a PENDING state rather than FOUND or NO_SUCH_NAME.
-  EXPECT_FALSE(info.was_found());
-  EXPECT_FALSE(info.was_nonexistant());
-
-  // Make sure we're completely re-usable, by going throug a normal flow.
-  info.SetQueuedState(UrlInfo::UNIT_TEST_MOTIVATED);
-  info.SetAssignedState();
-  info.SetFoundState();
-  EXPECT_TRUE(info.was_found());
-
-  // Use the congestion flow, and check that we end up in the found state.
-  info.SetQueuedState(UrlInfo::UNIT_TEST_MOTIVATED);
-  info.SetAssignedState();
-  info.RemoveFromQueue();  // Do the reset.
-  EXPECT_FALSE(info.is_assigned());
-  EXPECT_TRUE(info.was_found());  // Back to what it was before being queued.
-}
-
-
-// TODO(jar): Add death test for illegal state changes, and also for setting
-// hostname when already set.
-
-}  // namespace