base: Support using (D)CHECK on scoped enums.

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 233 matching lines @@
 
   // Test DCHECK on std::nullptr_t
   log_sink_call_count = 0;
   const void* p_null = nullptr;
   const void* p_not_null = &p_null;
   DCHECK_EQ(p_null, nullptr);
   DCHECK_EQ(nullptr, p_null);
   DCHECK_NE(p_not_null, nullptr);
   DCHECK_NE(nullptr, p_not_null);
   EXPECT_EQ(0, log_sink_call_count);
+
+  // Test DCHECK on a scoped enum.
+  enum class Animal { DOG, CAT };
+  DCHECK_EQ(Animal::DOG, Animal::DOG);
+  EXPECT_EQ(0, log_sink_call_count);
+  DCHECK_EQ(Animal::DOG, Animal::CAT);
+  EXPECT_EQ(DCHECK_IS_ON() ? 1 : 0, log_sink_call_count);
 }
 
 TEST_F(LoggingTest, DcheckReleaseBehavior) {
   int some_variable = 1;
   // These should still reference |some_variable| so we don't get
   // unused variable warnings.
   DCHECK(some_variable) << "test";
   DPCHECK(some_variable) << "test";
   DCHECK_EQ(some_variable, 1) << "test";
 }
@@ skipping 37 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