Define the Settings interface for a CrashReportDatabase and provide a Mac implementation.

client/settings_test.cc

+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "client/settings.h"
+
+#include "client/crash_report_database.h"
+#include "gtest/gtest.h"
+#include "util/file/file_io.h"
+#include "util/test/scoped_temp_dir.h"
+
+namespace crashpad {
+namespace test {
+namespace {
+
+class SettingsTest : public testing::Test {
+ public:
+  SettingsTest() : settings_(settings_path()) {}
+
+  base::FilePath settings_path() {
+    return temp_dir_.path().Append("settings");
+  }
+
+  Settings* settings() { return &settings_; }
+
+  void InitializeBadFile() {

[Mark Mentovai, 2015/03/09 19:12:36]

Also have something that removes settings_path() to test that set/get can
recover from that case too.

[Robert Sesek, 2015/03/09 21:16:28]

Done.

+    ScopedFileHandle handle(
+        LoggingOpenFileForWrite(settings_path(),
+                                FileWriteMode::kTruncateOrCreate,
+                                FilePermissions::kWorldReadable));
+    ASSERT_TRUE(handle.is_valid());
+
+    const char kBuf[] = "test bad file";
+    ASSERT_TRUE(LoggingWriteFile(handle.get(), kBuf, sizeof(kBuf)));
+    handle.reset();
+  }
+
+ protected:
+  // testing::Test:
+  void SetUp() override {
+    ASSERT_TRUE(settings()->Initialize());
+  }
+
+ private:
+  ScopedTempDir temp_dir_;
+  Settings settings_;
+
+  DISALLOW_COPY_AND_ASSIGN(SettingsTest);
+};
+
+TEST_F(SettingsTest, ClientID) {
+  UUID client_id;
+  EXPECT_TRUE(settings()->GetClientID(&client_id));
+  EXPECT_NE(UUID(), client_id);
+
+  Settings settings(settings_path());
+  UUID actual;
+  EXPECT_TRUE(settings.GetClientID(&actual));
+  EXPECT_EQ(client_id, actual);
+}
+
+TEST_F(SettingsTest, UploadsEnabled) {
+  bool enabled = true;
+  // Default value is false.
+  EXPECT_TRUE(settings()->GetUploadsEnabled(&enabled));
+  EXPECT_FALSE(enabled);
+
+  EXPECT_TRUE(settings()->SetUploadsEnabled(true));

[Mark Mentovai, 2015/03/09 19:12:36]

Make sure that this sticks if you have another Settings object, like you did in
the ClientID test.

[Robert Sesek, 2015/03/09 21:16:28]

Done.

+  EXPECT_TRUE(settings()->GetUploadsEnabled(&enabled));
+  EXPECT_TRUE(enabled);
+
+  EXPECT_TRUE(settings()->SetUploadsEnabled(false));
+  EXPECT_TRUE(settings()->GetUploadsEnabled(&enabled));
+  EXPECT_FALSE(enabled);
+}
+
+TEST_F(SettingsTest, LastUploadAttemptTime) {
+  time_t actual = -1;
+  EXPECT_TRUE(settings()->GetLastUploadAttemptTime(&actual));
+  // Default value is 0.
+  EXPECT_EQ(0, actual);
+
+  time_t expected = time(nullptr);

[Mark Mentovai, 2015/03/09 19:12:36]

Can be const.

[Robert Sesek, 2015/03/09 21:16:28]

Done.

+  EXPECT_TRUE(settings()->SetLastUploadAttemptTime(expected));

[Mark Mentovai, 2015/03/09 19:12:36]

Same.

[Robert Sesek, 2015/03/09 21:16:28]

Done.

+  EXPECT_TRUE(settings()->GetLastUploadAttemptTime(&actual));
+  EXPECT_EQ(expected, actual);
+}
+
+// The following tests write a corrupt settings file and test the recovery
+// operation.
+
+TEST_F(SettingsTest, BadFileOnInitialize) {
+  InitializeBadFile();
+
+  Settings settings(settings_path());
+  EXPECT_TRUE(settings.Initialize());
+}
+
+TEST_F(SettingsTest, BadFileOnGet) {
+  InitializeBadFile();
+
+  UUID client_id;
+  EXPECT_TRUE(settings()->GetClientID(&client_id));

[Mark Mentovai, 2015/03/09 19:12:36]

Make sure that this stored the client ID and that it’s stable if you have a new
Settings object that wasn’t involved in the recovery at all.

[Robert Sesek, 2015/03/09 21:16:27]

Done.

+  EXPECT_NE(UUID(), client_id);
+}
+
+TEST_F(SettingsTest, BadFileOnSet) {
+  InitializeBadFile();
+
+  EXPECT_TRUE(settings()->SetUploadsEnabled(true));
+  bool enabled = false;
+  EXPECT_TRUE(settings()->GetUploadsEnabled(&enabled));
+  EXPECT_TRUE(enabled);
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace crashpad