Extract unit tests from the mixed bag process_util_unittest.cc into proper files.

base/process/process_metrics_unittest.cc

 // Copyright 2013 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/process/process_metrics.h"
 
 #include <sstream>
 #include <string>
 
+#include "base/threading/thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 
 namespace base {
 namespace debug {
 
 // Tests for SystemMetrics.
 // Exists as a class so it can be a friend of SystemMetrics.
 class SystemMetricsTest : public testing::Test {
  public:
@@ skipping 243 matching lines @@
   EXPECT_TRUE(meminfo.pswpout == 406);
   EXPECT_TRUE(meminfo.pgmajfault == 487192);
   EXPECT_TRUE(ParseProcVmstat(valid_input2, &meminfo));
   EXPECT_TRUE(meminfo.pswpin == 12);
   EXPECT_TRUE(meminfo.pswpout == 901);
   EXPECT_TRUE(meminfo.pgmajfault == 2023);
 }
 #endif  // defined(OS_LINUX) || defined(OS_ANDROID)
 
 }  // namespace debug
 }  // namespace base

[Nico, 2013/11/21 00:19:26]

Can you put the tests in debug::base? It looks weird to have half the tests in
this file in base::debug, but not the other half.

[M-A Ruel, 2013/11/30 01:07:16]

Done.

+
+#if defined(OS_LINUX) || defined(OS_ANDROID)
+TEST(SystemMetrics2Test, GetSystemMemoryInfo) {
+  base::SystemMemoryInfoKB info;
+  EXPECT_TRUE(base::GetSystemMemoryInfo(&info));
+
+  // Ensure each field received a value.
+  EXPECT_GT(info.total, 0);
+  EXPECT_GT(info.free, 0);
+  EXPECT_GT(info.buffers, 0);
+  EXPECT_GT(info.cached, 0);
+  EXPECT_GT(info.active_anon, 0);
+  EXPECT_GT(info.inactive_anon, 0);
+  EXPECT_GT(info.active_file, 0);
+  EXPECT_GT(info.inactive_file, 0);
+
+  // All the values should be less than the total amount of memory.
+  EXPECT_LT(info.free, info.total);
+  EXPECT_LT(info.buffers, info.total);
+  EXPECT_LT(info.cached, info.total);
+  EXPECT_LT(info.active_anon, info.total);
+  EXPECT_LT(info.inactive_anon, info.total);
+  EXPECT_LT(info.active_file, info.total);
+  EXPECT_LT(info.inactive_file, info.total);
+
+#if defined(OS_CHROMEOS)
+  // Chrome OS exposes shmem.
+  EXPECT_GT(info.shmem, 0);
+  EXPECT_LT(info.shmem, info.total);
+  // Chrome unit tests are not run on actual Chrome OS hardware, so gem_objects
+  // and gem_size cannot be tested here.
+#endif
+}
+#endif  // defined(OS_LINUX) || defined(OS_ANDROID)
+
+#if defined(OS_WIN)
+// TODO(estade): if possible, port this test.
+TEST(ProcessMetricsTest, CalcFreeMemoryWin) {

[Nico, 2013/11/21 00:19:26]

We don't usually call tests that currently run only on one platform
TestPlatformname. I'd remove the trailing "Win"

[M-A Ruel, 2013/11/30 01:07:16]

Done.

[M-A Ruel, 2013/11/30 01:07:16]

Done.

+  scoped_ptr<base::ProcessMetrics> metrics(
+      base::ProcessMetrics::CreateProcessMetrics(::GetCurrentProcess()));
+  ASSERT_TRUE(NULL != metrics.get());
+
+  bool using_tcmalloc = false;
+
+  // Detect if we are using tcmalloc
+#if !defined(NO_TCMALLOC)
+  const char* chrome_allocator = getenv("CHROME_ALLOCATOR");
+  if (!chrome_allocator || _stricmp(chrome_allocator, "tcmalloc") == 0)
+    using_tcmalloc = true;
+#endif
+
+  // Typical values here is ~1900 for total and ~1000 for largest. Obviously
+  // it depends in what other tests have done to this process.
+  base::FreeMBytes free_mem1 = {0};
+  EXPECT_TRUE(metrics->CalculateFreeMemory(&free_mem1));
+  EXPECT_LT(10u, free_mem1.total);
+  EXPECT_LT(10u, free_mem1.largest);
+  EXPECT_GT(2048u, free_mem1.total);
+  EXPECT_GT(2048u, free_mem1.largest);
+  EXPECT_GE(free_mem1.total, free_mem1.largest);
+  EXPECT_TRUE(NULL != free_mem1.largest_ptr);
+
+  // Allocate 20M and check again. It should have gone down.
+  const int kAllocMB = 20;
+  scoped_ptr<char[]> alloc(new char[kAllocMB * 1024 * 1024]);
+  size_t expected_total = free_mem1.total - kAllocMB;
+  size_t expected_largest = free_mem1.largest;
+
+  base::FreeMBytes free_mem2 = {0};
+  EXPECT_TRUE(metrics->CalculateFreeMemory(&free_mem2));
+  EXPECT_GE(free_mem2.total, free_mem2.largest);
+  // This test is flaky when using tcmalloc, because tcmalloc
+  // allocation strategy sometimes results in less than the
+  // full drop of 20Mb of free memory.
+  if (!using_tcmalloc)
+    EXPECT_GE(expected_total, free_mem2.total);
+  EXPECT_GE(expected_largest, free_mem2.largest);
+  EXPECT_TRUE(NULL != free_mem2.largest_ptr);
+}
+#endif  // defined(OS_WIN)
+
+#if defined(OS_LINUX) || defined(OS_ANDROID)
+TEST(ProcessMetricsTest, ParseProcStatCPU) {
+  // /proc/self/stat for a process running "top".
+  const char kTopStat[] = "960 (top) S 16230 960 16230 34818 960 "
+      "4202496 471 0 0 0 "
+      "12 16 0 0 "  // <- These are the goods.
+      "20 0 1 0 121946157 15077376 314 18446744073709551615 4194304 "
+      "4246868 140733983044336 18446744073709551615 140244213071219 "
+      "0 0 0 138047495 0 0 0 17 1 0 0 0 0 0";
+  EXPECT_EQ(12 + 16, base::ParseProcStatCPU(kTopStat));
+
+  // cat /proc/self/stat on a random other machine I have.
+  const char kSelfStat[] = "5364 (cat) R 5354 5364 5354 34819 5364 "
+      "0 142 0 0 0 "
+      "0 0 0 0 "  // <- No CPU, apparently.
+      "16 0 1 0 1676099790 2957312 114 4294967295 134512640 134528148 "
+      "3221224832 3221224344 3086339742 0 0 0 0 0 0 0 17 0 0 0";
+
+  EXPECT_EQ(0, base::ParseProcStatCPU(kSelfStat));
+}
+#endif // defined(OS_LINUX) || defined(OS_ANDROID)
+
+// Disable on Android because base_unittests runs inside a Dalvik VM that
+// starts and stop threads (crbug.com/175563).
+#if defined(OS_LINUX)
+TEST(ProcessMetricsTest, GetNumberOfThreads) {
+  const base::ProcessHandle current = base::GetCurrentProcessHandle();
+  const int initial_threads = base::GetNumberOfThreads(current);
+  ASSERT_GT(initial_threads, 0);
+  const int kNumAdditionalThreads = 10;
+  {
+    scoped_ptr<base::Thread> my_threads[kNumAdditionalThreads];
+    for (int i = 0; i < kNumAdditionalThreads; ++i) {
+      my_threads[i].reset(new base::Thread("GetNumberOfThreadsTest"));
+      my_threads[i]->Start();
+      ASSERT_EQ(base::GetNumberOfThreads(current), initial_threads + 1 + i);
+    }
+  }
+  // The Thread destructor will stop them.
+  ASSERT_EQ(initial_threads, base::GetNumberOfThreads(current));
+}
+#endif  // defined(OS_LINUX)