PreloadCheck class for extension pre-install checks

chrome/browser/extensions/blacklist_check_unittest.cc

+// Copyright 2017 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/extensions/blacklist_check.h"
+
+#include "base/threading/thread_task_runner_handle.h"
+#include "chrome/browser/extensions/blacklist.h"
+#include "chrome/browser/extensions/test_blacklist.h"
+#include "chrome/browser/extensions/test_extension_prefs.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "extensions/browser/extension_prefs.h"
+#include "extensions/browser/preload_check.h"
+#include "extensions/browser/preload_check_test_util.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace extensions {
+namespace {
+
+class BlacklistCheckTest : public testing::Test {
+ public:
+  BlacklistCheckTest()
+      : test_prefs_(base::ThreadTaskRunnerHandle::Get()),
+        blacklist_(test_prefs_.prefs()) {}
+
+ protected:
+  void SetUp() override {
+    test_blacklist_.Attach(&blacklist_);
+    extension_ = test_prefs_.AddExtension("foo");
+  }
+
+  void SetBlacklistState(BlacklistState state) {
+    test_blacklist_.SetBlacklistState(extension_->id(), state, /*notify=*/true);
+  }
+
+  Blacklist* blacklist() { return &blacklist_; }
+  scoped_refptr<Extension> extension() { return extension_; }
+
+ protected:
+  PreloadCheckRunner runner_;

[Devlin, 2017/03/16 01:42:44]

nit: it'd be my preference to expose this through an accessor and keep this
private.

[michaelpg, 2017/03/17 02:34:26]

I don't see value in that. Unlike, say, browser_thread_bundle_ (which is only
used by the base class) or blacklist_ (which is set up and "owned" by the base
class), the runner_ object exists solely for tests (derived classes) to play
with. In fact, to be consistent, I'll move extension_ into the protected block
as well :-P

(The Google C++ guide allows for protected data members in Gtest tests.)

+
+ private:
+  content::TestBrowserThreadBundle browser_thread_bundle_;
+  TestExtensionPrefs test_prefs_;
+  Blacklist blacklist_;
+  TestBlacklist test_blacklist_;
+  scoped_refptr<Extension> extension_;
+};
+
+}  // namespace
+
+// Tests that the blacklist check identifies a blacklisted extension.
+TEST_F(BlacklistCheckTest, BlacklistedMalware) {
+  SetBlacklistState(BLACKLISTED_MALWARE);
+
+  BlacklistCheck check(blacklist(), extension());
+  runner_.RunUntilComplete(&check);
+
+  EXPECT_THAT(runner_.errors(),
+              testing::UnorderedElementsAre(PreloadCheck::BLACKLISTED_ID));
+  EXPECT_TRUE(check.GetErrorMessage().empty());
+}
+
+// Tests that the blacklist check ignores a non-blacklisted extension.
+TEST_F(BlacklistCheckTest, Pass) {
+  SetBlacklistState(NOT_BLACKLISTED);
+
+  BlacklistCheck check(blacklist(), extension());
+  runner_.RunUntilComplete(&check);
+
+  EXPECT_EQ(0u, runner_.errors().size());
+  EXPECT_TRUE(check.GetErrorMessage().empty());
+}
+
+// Tests that destroying the check after starting it does not cause errors.
+TEST_F(BlacklistCheckTest, ResetCheck) {
+  SetBlacklistState(BLACKLISTED_MALWARE);
+
+  {
+    BlacklistCheck check(blacklist(), extension());
+    check.Start(runner_.GetCallback());
+  }
+  runner_.Wait();
+  EXPECT_FALSE(runner_.called());
+}
+
+}  // namespace extensions