Reland again [Startup Tracing] Add --trace-config-file flag

components/tracing/trace_config_file_unittest.cc

Index: components/tracing/trace_config_file_unittest.cc
diff --git a/components/tracing/trace_config_file_unittest.cc b/components/tracing/trace_config_file_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d62c4d44217c5af0ec27aee91ef665a5bbd9e741
--- /dev/null
+++ b/components/tracing/trace_config_file_unittest.cc
@@ -0,0 +1,220 @@
+// Copyright (c) 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 "base/at_exit.h"
+#include "base/command_line.h"
+#include "base/files/file_util.h"
+#include "base/files/scoped_temp_dir.h"
+#include "components/tracing/trace_config_file.h"
+#include "components/tracing/tracing_switches.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace tracing {
+
+namespace {
+
+const char kTraceConfig[] =
+  "{"
+    "\"enable_argument_filter\":true,"
+    "\"enable_sampling\":true,"
+    "\"enable_systrace\":true,"
+    "\"excluded_categories\":[\"excluded\",\"exc_pattern*\"],"
+    "\"included_categories\":[\"included\","
+                             "\"inc_pattern*\","
+                             "\"disabled-by-default-cc\"],"
+    "\"record_mode\":\"record-continuously\","
+    "\"synthetic_delays\":[\"test.Delay1;16\",\"test.Delay2;32\"]"
+  "}";
+
+std::string GetTraceConfigFileContent(std::string trace_config,
+                                      std::string startup_duration,
+                                      std::string result_file) {
+  std::string content = "{";
+  if (!trace_config.empty())
+    content += "\"trace_config\":" + trace_config;
+
+  if (!startup_duration.empty()) {
+    if (content != "{")
+      content += ",";
+    content += "\"startup_duration\":" + startup_duration;
+  }
+
+  if (!result_file.empty()) {
+    if (content != "{")
+      content += ",";
+    content += "\"result_file\":\"" + result_file + "\"";
+  }
+
+  content += "}";
+  return content;
+}
+
+} // namespace
+
+TEST(TraceConfigFileTest, TraceStartupEnabled) {
+  base::ShadowingAtExitManager sem;
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kTraceStartup);
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kTraceConfigFile);
+
+  EXPECT_FALSE(TraceConfigFile::GetInstance()->IsEnabled());
+}
+
+TEST(TraceConfigFileTest, TraceShutdownEnabled) {
+  base::ShadowingAtExitManager sem;
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kTraceShutdown);
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kTraceConfigFile);
+
+  EXPECT_FALSE(TraceConfigFile::GetInstance()->IsEnabled());
+}
+
+TEST(TraceConfigFileTest, TraceConfigFileNotEnabled) {
+  base::ShadowingAtExitManager sem;
+  EXPECT_FALSE(TraceConfigFile::GetInstance()->IsEnabled());
+}
+
+TEST(TraceConfigFileTest, TraceConfigFileEnabledWithoutPath) {
+  base::ShadowingAtExitManager sem;
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kTraceConfigFile);
+
+  ASSERT_TRUE(TraceConfigFile::GetInstance()->IsEnabled());
+  EXPECT_EQ(base::trace_event::TraceConfig().ToString(),
+            TraceConfigFile::GetInstance()->GetTraceConfig().ToString());
+  EXPECT_EQ(5, TraceConfigFile::GetInstance()->GetStartupDuration());
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("chrometrace.log")),
+            TraceConfigFile::GetInstance()->GetResultFile());
+}
+
+TEST(TraceConfigFileTest, TraceConfigFileEnabledWithInvalidPath) {
+  base::ShadowingAtExitManager sem;
+  base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
+      switches::kTraceConfigFile,
+      base::FilePath(FILE_PATH_LITERAL("invalid-trace-config-file-path")));
+
+  EXPECT_FALSE(TraceConfigFile::GetInstance()->IsEnabled());
+}
+
+TEST(TraceConfigFileTest, ValidContent) {
+  base::ShadowingAtExitManager sem;
+  std::string content = GetTraceConfigFileContent(
+      kTraceConfig, "10", "trace_result_file.log");
+
+  base::FilePath trace_config_file;
+  base::ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  ASSERT_TRUE(
+      base::CreateTemporaryFileInDir(temp_dir.path(), &trace_config_file));
+  ASSERT_NE(-1, base::WriteFile(
+      trace_config_file, content.c_str(), (int)content.length()));
+  base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
+      switches::kTraceConfigFile, trace_config_file);
+
+  ASSERT_TRUE(TraceConfigFile::GetInstance()->IsEnabled());
+  EXPECT_STREQ(
+      kTraceConfig,
+      TraceConfigFile::GetInstance()->GetTraceConfig().ToString().c_str());
+  EXPECT_EQ(10, TraceConfigFile::GetInstance()->GetStartupDuration());
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("trace_result_file.log")),
+            TraceConfigFile::GetInstance()->GetResultFile());
+}
+
+TEST(TraceConfigFileTest, ValidContentWithOnlyTraceConfig) {
+  base::ShadowingAtExitManager sem;
+  std::string content = GetTraceConfigFileContent(kTraceConfig, "", "");
+
+  base::FilePath trace_config_file;
+  base::ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  ASSERT_TRUE(
+      base::CreateTemporaryFileInDir(temp_dir.path(), &trace_config_file));
+  ASSERT_NE(-1, base::WriteFile(
+      trace_config_file, content.c_str(), (int)content.length()));
+  base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
+      switches::kTraceConfigFile, trace_config_file);
+
+  ASSERT_TRUE(TraceConfigFile::GetInstance()->IsEnabled());
+  EXPECT_STREQ(
+      kTraceConfig,
+      TraceConfigFile::GetInstance()->GetTraceConfig().ToString().c_str());
+  EXPECT_EQ(0, TraceConfigFile::GetInstance()->GetStartupDuration());
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("chrometrace.log")),
+            TraceConfigFile::GetInstance()->GetResultFile());
+}
+
+TEST(TraceConfigFileTest, ContentWithNegtiveDuration) {
+  base::ShadowingAtExitManager sem;
+  std::string content = GetTraceConfigFileContent(kTraceConfig, "-1", "");
+
+  base::FilePath trace_config_file;
+  base::ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  ASSERT_TRUE(
+      base::CreateTemporaryFileInDir(temp_dir.path(), &trace_config_file));
+  ASSERT_NE(-1, base::WriteFile(
+      trace_config_file, content.c_str(), (int)content.length()));
+  base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
+      switches::kTraceConfigFile, trace_config_file);
+
+  ASSERT_TRUE(TraceConfigFile::GetInstance()->IsEnabled());
+  EXPECT_STREQ(
+      kTraceConfig,
+      TraceConfigFile::GetInstance()->GetTraceConfig().ToString().c_str());
+  EXPECT_EQ(0, TraceConfigFile::GetInstance()->GetStartupDuration());
+  EXPECT_EQ(base::FilePath(FILE_PATH_LITERAL("chrometrace.log")),
+            TraceConfigFile::GetInstance()->GetResultFile());
+}
+
+TEST(TraceConfigFileTest, ContentWithoutTraceConfig) {
+  base::ShadowingAtExitManager sem;
+  std::string content = GetTraceConfigFileContent(
+      "", "10", "trace_result_file.log");
+
+  base::FilePath trace_config_file;
+  base::ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  ASSERT_TRUE(
+      base::CreateTemporaryFileInDir(temp_dir.path(), &trace_config_file));
+  ASSERT_NE(-1, base::WriteFile(
+      trace_config_file, content.c_str(), (int)content.length()));
+  base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
+      switches::kTraceConfigFile, trace_config_file);
+
+  EXPECT_FALSE(TraceConfigFile::GetInstance()->IsEnabled());
+}
+
+TEST(TraceConfigFileTest, InvalidContent) {
+  base::ShadowingAtExitManager sem;
+  std::string content = "invalid trace config file content";
+
+  base::FilePath trace_config_file;
+  base::ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  ASSERT_TRUE(
+      base::CreateTemporaryFileInDir(temp_dir.path(), &trace_config_file));
+  ASSERT_NE(-1, base::WriteFile(
+      trace_config_file, content.c_str(), (int)content.length()));
+  base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
+      switches::kTraceConfigFile, trace_config_file);
+
+  EXPECT_FALSE(TraceConfigFile::GetInstance()->IsEnabled());
+}
+
+TEST(TraceConfigFileTest, EmptyContent) {
+  base::ShadowingAtExitManager sem;
+  base::FilePath trace_config_file;
+  base::ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  ASSERT_TRUE(
+      base::CreateTemporaryFileInDir(temp_dir.path(), &trace_config_file));
+  base::CommandLine::ForCurrentProcess()->AppendSwitchPath(
+      switches::kTraceConfigFile, trace_config_file);
+
+  EXPECT_FALSE(TraceConfigFile::GetInstance()->IsEnabled());
+}
+
+} // namespace tracing