Refactor the various ways to control what users can do to extensions.

chrome/browser/extensions/management_policy_unittest.cc

+// Copyright (c) 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/utf_string_conversions.h"
+#include "chrome/browser/extensions/management_policy.h"
+#include "chrome/browser/extensions/test_management_policy.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+typedef extensions::TestManagementPolicyProvider TestProvider;
+using extensions::Extension;
+
+class ManagementPolicyTest : public testing::Test {
+ public:
+  void SetUp() {
+    allow_all_.SetProhibitedActions(TestProvider::ALLOW_ALL);
+    no_modify_status_.SetProhibitedActions(
+        TestProvider::PROHIBIT_MODIFY_STATUS);
+    no_load_.SetProhibitedActions(TestProvider::PROHIBIT_LOAD);
+    must_remain_enabled_.SetProhibitedActions(
+        TestProvider::MUST_REMAIN_ENABLED);
+    restrict_all_.SetProhibitedActions(TestProvider::PROHIBIT_MODIFY_STATUS |
+                                       TestProvider::PROHIBIT_LOAD |
+                                       TestProvider::MUST_REMAIN_ENABLED);
+  }
+
+ protected:
+  extensions::ManagementPolicy policy_;
+
+  TestProvider allow_all_;
+  TestProvider no_modify_status_;
+  TestProvider no_load_;
+  TestProvider must_remain_enabled_;
+  TestProvider restrict_all_;
+};
+
+TEST_F(ManagementPolicyTest, RegisterAndUnregister) {
+  EXPECT_EQ(0, policy_.GetNumProviders());
+  policy_.RegisterProvider(&allow_all_);
+  EXPECT_EQ(1, policy_.GetNumProviders());
+  policy_.RegisterProvider(&allow_all_);
+  EXPECT_EQ(1, policy_.GetNumProviders());
+
+  policy_.RegisterProvider(&no_modify_status_);
+  EXPECT_EQ(2, policy_.GetNumProviders());
+  policy_.UnregisterProvider(&allow_all_);
+  EXPECT_EQ(1, policy_.GetNumProviders());
+  policy_.UnregisterProvider(&allow_all_);
+  EXPECT_EQ(1, policy_.GetNumProviders());
+  policy_.UnregisterProvider(&no_modify_status_);
+  EXPECT_EQ(0, policy_.GetNumProviders());
+
+  policy_.RegisterProvider(&allow_all_);
+  policy_.RegisterProvider(&no_modify_status_);
+  EXPECT_EQ(2, policy_.GetNumProviders());
+  policy_.UnregisterAllProviders();
+  EXPECT_EQ(0, policy_.GetNumProviders());
+}
+
+TEST_F(ManagementPolicyTest, UserMayLoad) {
+  // No providers registered.
+  string16 error;
+  // The extension and location are irrelevant to the
+  // TestManagementPolicyProviders.
+  EXPECT_TRUE(policy_.UserMayLoad(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // One provider, no relevant restriction.
+  policy_.RegisterProvider(&no_modify_status_);
+  EXPECT_TRUE(policy_.UserMayLoad(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // Two providers, no relevant restrictions.
+  policy_.RegisterProvider(&must_remain_enabled_);
+  EXPECT_TRUE(policy_.UserMayLoad(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // Three providers, one with a relevant restriction.
+  policy_.RegisterProvider(&no_load_);
+  EXPECT_FALSE(policy_.UserMayLoad(NULL, &error));
+  EXPECT_FALSE(error.empty());
+
+  // Remove the restriction.
+  policy_.UnregisterProvider(&no_load_);
+  error.clear();
+  EXPECT_TRUE(policy_.UserMayLoad(NULL, &error));
+  EXPECT_TRUE(error.empty());
+}
+TEST_F(ManagementPolicyTest, UserMayModifySettings) {
+  // No providers registered.
+  string16 error;
+  EXPECT_TRUE(policy_.UserMayModifySettings(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // One provider, no relevant restriction.
+  policy_.RegisterProvider(&allow_all_);
+  EXPECT_TRUE(policy_.UserMayModifySettings(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // Two providers, no relevant restrictions.
+  policy_.RegisterProvider(&no_load_);
+  EXPECT_TRUE(policy_.UserMayModifySettings(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // Three providers, one with a relevant restriction.
+  policy_.RegisterProvider(&no_modify_status_);
+  EXPECT_FALSE(policy_.UserMayModifySettings(NULL, &error));
+  EXPECT_FALSE(error.empty());
+
+  // Remove the restriction.
+  policy_.UnregisterProvider(&no_modify_status_);
+  error.clear();
+  EXPECT_TRUE(policy_.UserMayModifySettings(NULL, &error));
+  EXPECT_TRUE(error.empty());
+}
+
+TEST_F(ManagementPolicyTest, MustRemainEnabled) {
+  // No providers registered.
+  string16 error;
+  EXPECT_FALSE(policy_.MustRemainEnabled(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // One provider, no relevant restriction.
+  policy_.RegisterProvider(&allow_all_);
+  EXPECT_FALSE(policy_.MustRemainEnabled(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // Two providers, no relevant restrictions.
+  policy_.RegisterProvider(&no_modify_status_);
+  EXPECT_FALSE(policy_.MustRemainEnabled(NULL, &error));
+  EXPECT_TRUE(error.empty());
+
+  // Three providers, one with a relevant restriction.
+  policy_.RegisterProvider(&must_remain_enabled_);
+  EXPECT_TRUE(policy_.MustRemainEnabled(NULL, &error));
+  EXPECT_FALSE(error.empty());
+
+  // Remove the restriction.
+  policy_.UnregisterProvider(&must_remain_enabled_);
+  error.clear();
+  EXPECT_FALSE(policy_.MustRemainEnabled(NULL, &error));
+  EXPECT_TRUE(error.empty());
+}
+
+// Tests error handling in the ManagementPolicy.
+TEST_F(ManagementPolicyTest, ErrorHandling) {
+  // The error parameter should be unchanged if no restriction was found.
+  std::string original_error = "Ceci est en effet une erreur.";
+  string16 original_error16 = UTF8ToUTF16(original_error);
+  string16 error = original_error16;
+  EXPECT_TRUE(policy_.UserMayLoad(NULL, &error));
+  EXPECT_EQ(original_error, UTF16ToUTF8(error));
+  EXPECT_TRUE(policy_.UserMayModifySettings(NULL, &error));
+  EXPECT_EQ(original_error, UTF16ToUTF8(error));
+  EXPECT_FALSE(policy_.MustRemainEnabled(NULL, &error));
+  EXPECT_EQ(original_error, UTF16ToUTF8(error));
+
+  // Ensure no crashes if no error message was requested.
+  EXPECT_TRUE(policy_.UserMayLoad(NULL, NULL));
+  EXPECT_TRUE(policy_.UserMayModifySettings(NULL, NULL));
+  EXPECT_FALSE(policy_.MustRemainEnabled(NULL, NULL));
+  policy_.RegisterProvider(&restrict_all_);
+  EXPECT_FALSE(policy_.UserMayLoad(NULL, NULL));
+  EXPECT_FALSE(policy_.UserMayModifySettings(NULL, NULL));
+  EXPECT_TRUE(policy_.MustRemainEnabled(NULL, NULL));
+
+  // Make sure returned error is correct.
+  error = original_error16;
+  EXPECT_FALSE(policy_.UserMayLoad(NULL, &error));
+  EXPECT_EQ(UTF8ToUTF16(TestProvider::expected_error()), error);
+  error = original_error16;
+  EXPECT_FALSE(policy_.UserMayModifySettings(NULL, &error));
+  EXPECT_EQ(UTF8ToUTF16(TestProvider::expected_error()), error);
+  error = original_error16;
+  EXPECT_TRUE(policy_.MustRemainEnabled(NULL, &error));
+  EXPECT_EQ(UTF8ToUTF16(TestProvider::expected_error()), error);
+}