Make Blacklist::IsBlacklist asynchronous (it will need to be for safe

chrome/browser/extensions/blacklist_unittest.cc

+// Copyright 2012 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/message_loop.h"
+#include "chrome/browser/extensions/blacklist.h"
+#include "chrome/browser/extensions/extension_prefs.h"
+#include "chrome/browser/extensions/test_blacklist.h"
+#include "chrome/browser/extensions/test_extension_prefs.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace extensions {
+namespace {
+
+class BlacklistTest : public testing::Test {
+ public:
+  BlacklistTest()
+      : prefs_(message_loop_.message_loop_proxy()),
+        blacklist_(prefs_.prefs()) {
+  }
+
+  bool IsBlacklisted(const Extension* extension) {
+    return TestBlacklist(&blacklist_).IsBlacklisted(extension->id());
+  }
+
+  void SetFromUpdater(const std::vector<std::string>& ids,
+                      const std::string& version) {
+    blacklist_.SetFromUpdater(ids, version);
+  }
+
+ protected:
+  MessageLoop message_loop_;
+
+  TestExtensionPrefs prefs_;
+
+  Blacklist blacklist_;
+};
+
+TEST_F(BlacklistTest, SetFromUpdater) {
+  scoped_refptr<const Extension> extension_a = prefs_.AddExtension("a");
+  scoped_refptr<const Extension> extension_b = prefs_.AddExtension("b");
+  scoped_refptr<const Extension> extension_c = prefs_.AddExtension("c");
+  scoped_refptr<const Extension> extension_d = prefs_.AddExtension("d");
+
+  // c, d, start blacklisted.
+  prefs_.prefs()->SetExtensionBlacklisted(extension_c->id(), true);
+  prefs_.prefs()->SetExtensionBlacklisted(extension_d->id(), true);
+
+  EXPECT_FALSE(IsBlacklisted(extension_a));
+  EXPECT_FALSE(IsBlacklisted(extension_b));
+  EXPECT_TRUE(IsBlacklisted(extension_c));
+  EXPECT_TRUE(IsBlacklisted(extension_d));
+
+  // Mix up the blacklist.
+  {
+    std::vector<std::string> blacklist;
+    blacklist.push_back(extension_b->id());
+    blacklist.push_back(extension_c->id());
+    SetFromUpdater(blacklist, "1");
+  }
+  EXPECT_FALSE(IsBlacklisted(extension_a));
+  EXPECT_TRUE(IsBlacklisted(extension_b));
+  EXPECT_TRUE(IsBlacklisted(extension_c));
+  EXPECT_FALSE(IsBlacklisted(extension_d));
+
+  // No-op, just in case.
+  {
+    std::vector<std::string> blacklist;
+    blacklist.push_back(extension_b->id());
+    blacklist.push_back(extension_c->id());
+    SetFromUpdater(blacklist, "2");
+  }
+  EXPECT_FALSE(IsBlacklisted(extension_a));
+  EXPECT_TRUE(IsBlacklisted(extension_b));
+  EXPECT_TRUE(IsBlacklisted(extension_c));
+  EXPECT_FALSE(IsBlacklisted(extension_d));
+
+  // Strictly increase the blacklist.
+  {
+    std::vector<std::string> blacklist;
+    blacklist.push_back(extension_a->id());
+    blacklist.push_back(extension_b->id());
+    blacklist.push_back(extension_c->id());
+    blacklist.push_back(extension_d->id());
+    SetFromUpdater(blacklist, "3");
+  }
+  EXPECT_TRUE(IsBlacklisted(extension_a));
+  EXPECT_TRUE(IsBlacklisted(extension_b));
+  EXPECT_TRUE(IsBlacklisted(extension_c));
+  EXPECT_TRUE(IsBlacklisted(extension_d));
+
+  // Strictly decrease the blacklist.
+  {
+    std::vector<std::string> blacklist;
+    blacklist.push_back(extension_a->id());
+    blacklist.push_back(extension_b->id());
+    SetFromUpdater(blacklist, "4");
+  }
+  EXPECT_TRUE(IsBlacklisted(extension_a));
+  EXPECT_TRUE(IsBlacklisted(extension_b));
+  EXPECT_FALSE(IsBlacklisted(extension_c));
+  EXPECT_FALSE(IsBlacklisted(extension_d));
+
+  // Clear the blacklist.
+  {
+    std::vector<std::string> blacklist;
+    SetFromUpdater(blacklist, "5");
+  }
+  EXPECT_FALSE(IsBlacklisted(extension_a));
+  EXPECT_FALSE(IsBlacklisted(extension_b));
+  EXPECT_FALSE(IsBlacklisted(extension_c));
+  EXPECT_FALSE(IsBlacklisted(extension_d));
+}
+
+}  // namespace extensions
+}  // namespace