Report Precache.TimeSinceLastPrecache

components/precache/core/precache_session_table_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 <stdint.h>
+
 #include "base/compiler_specific.h"
 #include "base/time/time.h"
 #include "components/precache/core/precache_session_table.h"
 #include "components/precache/core/proto/unfinished_work.pb.h"
 #include "sql/connection.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 namespace precache {
 
 namespace {
 
 class PrecacheSessionTableTest : public testing::Test {
  public:
   PrecacheSessionTableTest() {}
   ~PrecacheSessionTableTest() override {}
 
  protected:
   void SetUp() override {
     precache_session_table_.reset(new PrecacheSessionTable());
     db_.reset(new sql::Connection());
     ASSERT_TRUE(db_->OpenInMemory());
     precache_session_table_->Init(db_.get());
   }
 
   std::unique_ptr<PrecacheSessionTable> precache_session_table_;
   std::unique_ptr<sql::Connection> db_;
 };
 
+TEST_F(PrecacheSessionTableTest, LastPrecacheTimestamp) {
+  const base::Time sometime = base::Time::FromDoubleT(42);
+
+  precache_session_table_->SetLastPrecacheTimestamp(sometime);
+
+  EXPECT_EQ(sometime, precache_session_table_->GetLastPrecacheTimestamp());
+
+  precache_session_table_->DeleteLastPrecacheTimestamp();
+
+  EXPECT_EQ(base::Time(), precache_session_table_->GetLastPrecacheTimestamp());
+}
+
+TEST_F(PrecacheSessionTableTest, LastPrecacheTimestampSaturatedInt64) {
+  // If I merely add 1 it won't change the double due to the lack of resolution:
+  // 63 bits of int64 vs 55 of double.
+  const double beyond_int64_seconds =
+      static_cast<double>(std::numeric_limits<int64_t>::max()) * 2;
+  const base::Time large_time = base::Time::FromDoubleT(beyond_int64_seconds);
+
+  precache_session_table_->SetLastPrecacheTimestamp(large_time);
+
+  EXPECT_EQ(large_time, precache_session_table_->GetLastPrecacheTimestamp());
+  // Anyway, base::Time does int64_t saturation for us, so these saturated casts
+  // are not strictly needed with the current implementation of base::Time.
+  EXPECT_TRUE(large_time.is_max());
+}
+
 TEST_F(PrecacheSessionTableTest, SaveAndGetUnfinishedWork) {
   std::unique_ptr<PrecacheUnfinishedWork> unfinished_work(
       new PrecacheUnfinishedWork());
   unfinished_work->add_top_host()->set_hostname("foo.com");
   unfinished_work->add_top_host()->set_hostname("bar.com");
   auto s = unfinished_work->mutable_config_settings();
   s->set_top_sites_count(11);
   s->add_forced_site("baz.com");
   s->set_top_resources_count(12);
   s->set_max_bytes_per_resource(501);
@@ skipping 97 matching lines @@
 
   std::unique_ptr<PrecacheUnfinishedWork> unfinished_work2 =
       precache_session_table_->GetUnfinishedWork();
 
   EXPECT_EQ(0, unfinished_work2->manifest_size());
 }
 
 }  // namespace
 
 }  // namespace precache