Implement install module verification metric.

chrome/browser/install_module_verifier_unittest_win.cc

Index: chrome/browser/install_module_verifier_unittest_win.cc
diff --git a/chrome/browser/install_module_verifier_unittest_win.cc b/chrome/browser/install_module_verifier_unittest_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c78081ef9826ad5b2c1ac9222bd6a581a8f4e07b
--- /dev/null
+++ b/chrome/browser/install_module_verifier_unittest_win.cc
@@ -0,0 +1,156 @@
+// Copyright (c) 2013 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 "chrome/browser/install_module_verifier_win.h"
+
+#include <set>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/md5.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/values.h"
+#include "chrome/browser/enumerate_modules_model_win.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+void AddModule(base::ListValue* list,
+               ModuleEnumerator::ModuleType type,
+               const std::string& name) {
+  scoped_ptr<base::DictionaryValue> data(new DictionaryValue());
+  data->SetInteger("type", type);
+  data->SetString("name", name);
+  list->Append(data.release());
+}
+
+}  // namespace
+
+TEST(InstallModuleVerifierTest, ExtractLoadedModuleNameDigests) {
+  std::set<std::string> loaded_module_name_digests;
+  scoped_ptr<base::ListValue> list(new ListValue());
+  ExtractLoadedModuleNameDigests(*list, &loaded_module_name_digests);
+  ASSERT_TRUE(loaded_module_name_digests.empty());
+  // WinSock modules are ignored.
+  AddModule(list.get(),
+            ModuleEnumerator::SHELL_EXTENSION, "winsock_module.dll");
+  // Shell Extension modules are ignored.
+  AddModule(
+      list.get(),
+      ModuleEnumerator::WINSOCK_MODULE_REGISTRATION, "shell_extension.dll");
+  AddModule(list.get(), ModuleEnumerator::LOADED_MODULE, "fancy_pants.dll");
+  AddModule(list.get(), ModuleEnumerator::LOADED_MODULE, "chrome.dll");
+  ExtractLoadedModuleNameDigests(*list, &loaded_module_name_digests);
+  ASSERT_EQ(2, loaded_module_name_digests.size());
+  ASSERT_NE(loaded_module_name_digests.end(),
+            loaded_module_name_digests.find(base::MD5String("chrome.dll")));
+  ASSERT_NE(loaded_module_name_digests.end(),
+            loaded_module_name_digests.find(
+                base::MD5String("fancy_pants.dll")));
+}
+
+TEST(InstallModuleVerifierTest, VerifyModules) {
+  std::set<std::string> loaded_module_name_digests;
+  std::set<size_t> reported_module_ids;
+
+  VerifyModules(loaded_module_name_digests,
+                AdditionalModules(),
+                &reported_module_ids);
+  ASSERT_TRUE(reported_module_ids.empty());
+
+  // Expected, Loaded modules are reported.
+  loaded_module_name_digests.insert(base::MD5String("chrome.dll"));
+  // Unexpected modules are ignored.
+  loaded_module_name_digests.insert(base::MD5String("fancy_pants.dll"));
+  VerifyModules(loaded_module_name_digests,
+                AdditionalModules(),
+                &reported_module_ids);
+  ASSERT_EQ(1, reported_module_ids.size());
+  // chrome.dll
+  ASSERT_NE(reported_module_ids.end(), reported_module_ids.find(1u));
+  reported_module_ids.clear();
+
+  // AdditionalModules can be used to detect other modules.
+  AdditionalModules additional_modules;
+  std::string fancy_pants_md5_digest(base::MD5String("fancy_pants.dll"));
+  additional_modules.push_back(
+      std::make_pair(123u, base::StringPiece(fancy_pants_md5_digest)));
+  VerifyModules(loaded_module_name_digests,
+                additional_modules,
+                &reported_module_ids);
+  ASSERT_EQ(2, reported_module_ids.size());
+  // chrome.dll
+  ASSERT_NE(reported_module_ids.end(), reported_module_ids.find(1u));
+  // fancy_pants.dll
+  ASSERT_NE(reported_module_ids.end(), reported_module_ids.find(123u));
+  reported_module_ids.clear();
+
+  // TODO(erikwright): Verify case-insensitive.
+}
+
+TEST(InstallModuleVerifierTest, ParseAdditionalModules) {
+  std::vector<std::pair<size_t, base::StringPiece> > additional_modules;
+
+  ParseAdditionalModules(base::StringPiece(), &additional_modules);
+  ASSERT_EQ(0u, additional_modules.size());
+
+  // Invalid input.
+  ParseAdditionalModules("hello", &additional_modules);
+  ASSERT_EQ(0u, additional_modules.size());
+  ParseAdditionalModules("hello world", &additional_modules);
+  ASSERT_EQ(0u, additional_modules.size());
+  ParseAdditionalModules("hello world\nfoo bar", &additional_modules);
+  ASSERT_EQ(0u, additional_modules.size());
+  ParseAdditionalModules("123 world\nfoo bar", &additional_modules);
+  ASSERT_EQ(0u, additional_modules.size());
+
+  // A single valid line followed by an invalid line.
+  ParseAdditionalModules("hello 0123456789abcdef0123456789abcdef\nfoo bar",
+                         &additional_modules);
+  ASSERT_EQ(0u, additional_modules.size());
+  ParseAdditionalModules("123 0123456789abcdef0123456789abcdef\nfoo bar",
+                         &additional_modules);
+  ASSERT_EQ(1u, additional_modules.size());
+  ASSERT_EQ(123u, additional_modules[0].first);
+  ASSERT_EQ("0123456789abcdef0123456789abcdef", additional_modules[0].second);
+  additional_modules.clear();
+
+  // The same, but with \r\n.
+  ParseAdditionalModules("123 0123456789abcdef0123456789abcdef\r\nfoo bar",
+                         &additional_modules);
+  ASSERT_EQ(1u, additional_modules.size());
+  ASSERT_EQ(123u, additional_modules[0].first);
+  ASSERT_EQ("0123456789abcdef0123456789abcdef", additional_modules[0].second);
+  additional_modules.clear();
+
+  // Several valid and invalid lines, with varying line terminations etc.
+  ParseAdditionalModules("123 0123456789abcdef0123456789abcdef\r\n"
+                         "456 DEADBEEFDEADBEEF\r"
+                         "789 DEADBEEFDEADBEEFDEADBEEFDEADBEEF\n"
+                         "\n"
+                         "\n"
+                         "321 BAADCAFEBAADCAFEBAADCAFEBAADCAFE\n",
+                         &additional_modules);
+  ASSERT_EQ(3u, additional_modules.size());
+  ASSERT_EQ(123u, additional_modules[0].first);
+  ASSERT_EQ("0123456789abcdef0123456789abcdef", additional_modules[0].second);
+  ASSERT_EQ(789u, additional_modules[1].first);
+  ASSERT_EQ("DEADBEEFDEADBEEFDEADBEEFDEADBEEF", additional_modules[1].second);
+  ASSERT_EQ(321u, additional_modules[2].first);
+  ASSERT_EQ("BAADCAFEBAADCAFEBAADCAFEBAADCAFE", additional_modules[2].second);
+  additional_modules.clear();
+
+  // Leading empty lines, no termination on final line.
+  ParseAdditionalModules("\n"
+                         "123 0123456789abcdef0123456789abcdef\r\n"
+                         "321 BAADCAFEBAADCAFEBAADCAFEBAADCAFE",
+                         &additional_modules);
+  ASSERT_EQ(2u, additional_modules.size());
+  ASSERT_EQ(123u, additional_modules[0].first);
+  ASSERT_EQ("0123456789abcdef0123456789abcdef", additional_modules[0].second);
+  ASSERT_EQ(321u, additional_modules[1].first);
+  ASSERT_EQ("BAADCAFEBAADCAFEBAADCAFEBAADCAFE", additional_modules[1].second);
+  additional_modules.clear();
+}