Adding crash utilities to chromecast/crash.

chromecast/app/linux/cast_crash_reporter_client_unittest.cc

+// Copyright 2015 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 <fstream>
+
+#include "base/base_paths.h"
+#include "base/bind.h"
+#include "base/files/file.h"
+#include "base/files/file_util.h"
+#include "base/memory/scoped_vector.h"
+#include "base/test/scoped_path_override.h"
+#include "chromecast/app/linux/cast_crash_reporter_client.h"
+#include "chromecast/crash/app_state_tracker.h"
+#include "chromecast/crash/linux/crash_util.h"
+#include "chromecast/crash/linux/dump_info.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromecast {
+namespace {
+
+const char kFakeDumpstateContents[] = "Dumpstate Contents\nDumpdumpdumpdump\n";
+const char kFakeMinidumpContents[] = "Minidump Contents\nLine1\nLine2\n";
+
+int WriteFakeDumpStateFile(const std::string& path) {
+  // Append the correct extension and write the data to file.
+  base::File dumpstate(base::FilePath(path).AddExtension(".txt.gz"),
+                       base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
+  dumpstate.Write(
+      0, kFakeDumpstateContents, sizeof(kFakeDumpstateContents) - 1);
+  return 0;
+}
+
+ScopedVector<DumpInfo> GetCurrentDumps(const std::string& logfile_path) {
+  ScopedVector<DumpInfo> dumps;
+  std::string entry;
+
+  std::ifstream in(logfile_path);
+  DCHECK(in.is_open());
+  while (std::getline(in, entry)) {
+    scoped_ptr<DumpInfo> info(new DumpInfo(entry));
+    dumps.push_back(info.Pass());
+  }
+  return dumps.Pass();
+}
+
+}  // namespace
+
+TEST(CastCrashReporterClientTest, EndToEnd) {
+  // Set up a temporary directory which will be used as our fake home dir.
+  base::FilePath fake_home_dir;
+  ASSERT_TRUE(base::CreateNewTempDirectory("", &fake_home_dir));
+  base::ScopedPathOverride home(base::DIR_HOME, fake_home_dir);
+
+  // Set a callback to be used in place of the |dumpstate| executable.
+  CrashUtil::SetDumpStateCbForTest(base::Bind(&WriteFakeDumpStateFile));
+
+  // "Launch" YouTube.
+  AppStateTracker::SetLastLaunchedApp("youtube");
+  AppStateTracker::SetCurrentApp("youtube");
+
+  // "Launch" and switch to Pandora.
+  AppStateTracker::SetLastLaunchedApp("pandora");
+  AppStateTracker::SetCurrentApp("pandora");
+
+  // "Launch" Netflix.
+  AppStateTracker::SetLastLaunchedApp("netflix");
+  // Netflix crashed.
+
+  // A minidump file is created.
+  base::FilePath minidump_path;
+  base::CreateTemporaryFile(&minidump_path);
+  base::File minidump(minidump_path,
+                      base::File::FLAG_OPEN | base::File::FLAG_APPEND);
+  minidump.Write(0, kFakeMinidumpContents, sizeof(kFakeMinidumpContents) - 1);
+  minidump.Close();
+
+  // Handle the crash.
+  CastCrashReporterClient client;
+  ASSERT_TRUE(client.HandleCrashDump(minidump_path.value().c_str()));
+
+  // Assert that the original file has been moved.
+  ASSERT_FALSE(base::PathExists(minidump_path));
+
+  // Assert that the file has been moved to "minidumps", with the expected
+  // contents.
+  std::string contents;
+  base::FilePath new_minidump =
+      fake_home_dir.Append("minidumps").Append(minidump_path.BaseName());
+  ASSERT_TRUE(base::PathExists(new_minidump));
+  ASSERT_TRUE(base::ReadFileToString(new_minidump, &contents));
+  ASSERT_EQ(kFakeMinidumpContents, contents);
+
+  // Assert that the dumpstate file has been written with the expected contents.
+  base::FilePath dumpstate = new_minidump.AddExtension(".txt.gz");
+  ASSERT_TRUE(base::PathExists(dumpstate));
+  ASSERT_TRUE(base::ReadFileToString(dumpstate, &contents));
+  ASSERT_EQ(kFakeDumpstateContents, contents);
+
+  // Assert that the lockfile has logged the correct information.
+  base::FilePath lockfile =
+      fake_home_dir.Append("minidumps").Append("lockfile");
+  ASSERT_TRUE(base::PathExists(lockfile));
+  ScopedVector<DumpInfo> dumps = GetCurrentDumps(lockfile.value());
+  ASSERT_EQ(1u, dumps.size());
+
+  const DumpInfo& dump_info = *(dumps[0]);
+  ASSERT_TRUE(dump_info.valid());
+  EXPECT_EQ(new_minidump.value(), dump_info.crashed_process_dump());
+  EXPECT_EQ(dumpstate.value(), dump_info.logfile());
+  EXPECT_EQ("youtube", dump_info.params().previous_app_name);
+  EXPECT_EQ("pandora", dump_info.params().current_app_name);
+  EXPECT_EQ("netflix", dump_info.params().last_app_name);
+}
+
+}  // namespace chromecast