Report CHECK/DCHECK to test launcher summary output.

base/logging_unittest.cc

 // Copyright (c) 2011 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/compiler_specific.h"
 #include "base/logging.h"
 #include "base/macros.h"
 
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 34 matching lines @@
 class LoggingTest : public testing::Test {
  private:
   LogStateSaver log_state_saver_;
 };
 
 class MockLogSource {
  public:
   MOCK_METHOD0(Log, const char*());
 };
 
+// Message handler used by test launcher to debug CHECK/DCHECK.
+// This object will temporary disable message handler for test.

[dcheng, 2017/01/20 08:26:23]

Nit: Scoper object to temporarily clear any log message handlers for testing
DCHECK/CHECK functionality.

[alex-ac, 2017/01/20 12:11:16]

Done.

+class MockLogMessageHandler {
+ public:
+  MockLogMessageHandler() : saved_handler_(GetLogMessageHandler()) {
+    SetLogMessageHandler(nullptr);
+  }
+
+  ~MockLogMessageHandler() { SetLogMessageHandler(saved_handler_); }
+
+ private:
+  LogMessageHandlerFunction saved_handler_;
+};
+
 TEST_F(LoggingTest, BasicLogging) {
   MockLogSource mock_log_source;
   EXPECT_CALL(mock_log_source, Log()).Times(DEBUG_MODE ? 16 : 8).
       WillRepeatedly(Return("log message"));
 
   SetMinLogLevel(LOG_INFO);
 
   EXPECT_TRUE(LOG_IS_ON(INFO));
   // As of g++-4.5, the first argument to EXPECT_EQ cannot be a
   // constant expression.
@@ skipping 80 matching lines @@
   DLOG_IF(INFO, true) << mock_log_source.Log();
   DPLOG(INFO) << mock_log_source.Log();
   DPLOG_IF(INFO, true) << mock_log_source.Log();
   DVLOG(1) << mock_log_source.Log();
   DVLOG_IF(1, true) << mock_log_source.Log();
   DVPLOG(1) << mock_log_source.Log();
   DVPLOG_IF(1, true) << mock_log_source.Log();
 }
 
 TEST_F(LoggingTest, LoggingIsLazyByDestination) {
+  MockLogMessageHandler mock_handler;
   MockLogSource mock_log_source;
   MockLogSource mock_log_source_error;
   EXPECT_CALL(mock_log_source, Log()).Times(0);
 
   // Severity >= ERROR is always printed to stderr.
   EXPECT_CALL(mock_log_source_error, Log()).Times(1).
       WillRepeatedly(Return("log message"));
 
   LoggingSettings settings;
   settings.logging_dest = LOG_NONE;
@@ skipping 176 matching lines @@
     std::wstring wstr = L"Hello World";
     std::ostringstream ostr;
     ostr << wstr;
     EXPECT_EQ("Hello World", ostr.str());
   }
 }  // namespace nested_test
 
 }  // namespace
 
 }  // namespace logging