V4LDM: Add check for HashPrefix match and some tests

components/safe_browsing_db/v4_local_database_manager_unittest.cc

Index: components/safe_browsing_db/v4_local_database_manager_unittest.cc
diff --git a/components/safe_browsing_db/v4_local_database_manager_unittest.cc b/components/safe_browsing_db/v4_local_database_manager_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d8f3a3c317bf983dcae56f5948a53713405651ec
--- /dev/null
+++ b/components/safe_browsing_db/v4_local_database_manager_unittest.cc
@@ -0,0 +1,136 @@
+// 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 "base/files/scoped_temp_dir.h"
+#include "base/memory/ptr_util.h"
+#include "base/memory/ref_counted.h"
+#include "base/run_loop.h"
+#include "base/test/test_simple_task_runner.h"
+#include "components/safe_browsing_db/v4_database.h"
+#include "components/safe_browsing_db/v4_local_database_manager.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "testing/platform_test.h"
+
+namespace safe_browsing {
+
+class FakeV4Database : public V4Database {
+ public:
+  FakeV4Database(const scoped_refptr<base::SequencedTaskRunner>& db_task_runner,
+                 std::unique_ptr<StoreMap> store_map,
+                 const MatchedHashPrefixMap& matched_hash_prefix_map)
+      : V4Database(db_task_runner, std::move(store_map)),
+        matched_hash_prefix_map_(matched_hash_prefix_map) {}
+
+  void GetStoresMatchingFullHash(
+      const FullHash& full_hash,
+      const base::hash_set<UpdateListIdentifier>& stores_to_look,
+      MatchedHashPrefixMap* matched_hash_prefix_map) override {
+    *matched_hash_prefix_map = matched_hash_prefix_map_;
+  }
+
+ private:
+  const MatchedHashPrefixMap& matched_hash_prefix_map_;
+};
+
+class V4LocalDatabaseManagerTest : public PlatformTest {
+ public:
+  V4LocalDatabaseManagerTest() : task_runner_(new base::TestSimpleTaskRunner) {}
+
+  void SetUp() override {
+    PlatformTest::SetUp();
+
+    ASSERT_TRUE(base_dir_.CreateUniqueTempDir());
+    DVLOG(1) << "base_dir_: " << base_dir_.path().value();
+
+    v4_local_database_manager_ =
+        make_scoped_refptr(new V4LocalDatabaseManager(base_dir_.path()));
+    v4_local_database_manager_->SetTaskRunnerForTest(task_runner_);
+
+    SetupLocalDatabaseManager();
+  }
+
+  void TearDown() override {
+    v4_local_database_manager_->StopOnIOThread(true);
+
+    // Force destruction of the database.
+    task_runner_->RunPendingTasks();
+    base::RunLoop().RunUntilIdle();
+
+    PlatformTest::TearDown();
+  }
+
+  void SetupLocalDatabaseManager() {
+    v4_local_database_manager_->StartOnIOThread(NULL, V4ProtocolConfig());
+
+    task_runner_->RunPendingTasks();
+    base::RunLoop().RunUntilIdle();
+  }
+
+  void ReplaceV4Database(const MatchedHashPrefixMap& matched_hash_prefix_map) {
+    v4_local_database_manager_->v4_database_.reset(new FakeV4Database(
+        task_runner_, base::MakeUnique<StoreMap>(), matched_hash_prefix_map));
+  }
+
+  void ForceDisableLocalDatabaseManager() {
+    v4_local_database_manager_->enabled_ = false;
+  }
+
+  base::ScopedTempDir base_dir_;
+  scoped_refptr<base::TestSimpleTaskRunner> task_runner_;
+  content::TestBrowserThreadBundle thread_bundle_;
+  scoped_refptr<V4LocalDatabaseManager> v4_local_database_manager_;
+};
+
+TEST_F(V4LocalDatabaseManagerTest, TestGetThreatSource) {
+  EXPECT_EQ(ThreatSource::LOCAL_PVER4,
+            v4_local_database_manager_->GetThreatSource());
+}
+
+TEST_F(V4LocalDatabaseManagerTest, TestIsSupported) {
+  EXPECT_TRUE(v4_local_database_manager_->IsSupported());
+}
+
+TEST_F(V4LocalDatabaseManagerTest, TestCanCheckUrl) {
+  EXPECT_TRUE(
+      v4_local_database_manager_->CanCheckUrl(GURL("http://example.com/a/")));
+  EXPECT_TRUE(
+      v4_local_database_manager_->CanCheckUrl(GURL("https://example.com/a/")));
+  EXPECT_TRUE(
+      v4_local_database_manager_->CanCheckUrl(GURL("ftp://example.com/a/")));
+  EXPECT_FALSE(
+      v4_local_database_manager_->CanCheckUrl(GURL("adp://example.com/a/")));
+}
+
+TEST_F(V4LocalDatabaseManagerTest,
+       TestCheckBrowseUrlWithEmptyStoresReturnsNoMatch) {
+  // Both the stores are empty right now so CheckBrowseUrl should return true.
+  EXPECT_TRUE(v4_local_database_manager_->CheckBrowseUrl(
+      GURL("http://example.com/a/"), nullptr));
+}
+
+TEST_F(V4LocalDatabaseManagerTest, TestCheckBrowseUrlWithFakeDbReturnsMatch) {
+  MatchedHashPrefixMap matched_hash_prefix_map;
+  matched_hash_prefix_map[GetUrlMalwareId()] = HashPrefix("aaaa");
+  ReplaceV4Database(matched_hash_prefix_map);
+
+  // The fake database returns a matched hash prefix.
+  EXPECT_FALSE(v4_local_database_manager_->CheckBrowseUrl(
+      GURL("http://example.com/a/"), nullptr));
+}
+
+TEST_F(V4LocalDatabaseManagerTest,
+       TestCheckBrowseUrlReturnsNoMatchWhenDisabled) {
+  MatchedHashPrefixMap matched_hash_prefix_map;
+  matched_hash_prefix_map[GetUrlMalwareId()] = HashPrefix("aaaa");
+  ReplaceV4Database(matched_hash_prefix_map);
+
+  // The same URL returns |false| in the previous test because
+  // v4_local_database_manager_ is enabled.
+  ForceDisableLocalDatabaseManager();
+
+  EXPECT_TRUE(v4_local_database_manager_->CheckBrowseUrl(
+      GURL("http://example.com/a/"), nullptr));
+}
+
+}  // namespace safe_browsing