check the return value of base::SysInfo::MaxSharedMemorySize().

base/sys_info_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/file_util.h"
 #include "base/sys_info.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 typedef PlatformTest SysInfoTest;
 
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+TEST_F(SysInfoTest, MaxSharedMemorySize) {
+  // We aren't actually testing that it's correct, just that it's sane.
+  EXPECT_GT(base::SysInfo::MaxSharedMemorySize(), 0u);
+}
+#endif
+
 TEST_F(SysInfoTest, NumProcs) {
   // We aren't actually testing that it's correct, just that it's sane.
   EXPECT_GE(base::SysInfo::NumberOfProcessors(), 1);
 }
 
 TEST_F(SysInfoTest, AmountOfMem) {
   // We aren't actually testing that it's correct, just that it's sane.
   EXPECT_GT(base::SysInfo::AmountOfPhysicalMemory(), 0);
   EXPECT_GT(base::SysInfo::AmountOfPhysicalMemoryMB(), 0);
 }
@@ skipping 61 matching lines @@
   base::SysInfo::ParseLsbRelease(lsb_release,
                                  &os_major_version,
                                  &os_minor_version,
                                  &os_bugfix_version);
   EXPECT_EQ(-1, os_major_version);
   EXPECT_EQ(-1, os_minor_version);
   EXPECT_EQ(-1, os_bugfix_version);
 }
 
 #endif  // OS_CHROMEOS