1 files changed, 38 insertions, 1 deletions
diff --git a/lldb/unittests/Utility/TimerTest.cpp b/lldb/unittests/Utility/TimerTest.cpp
index 28d8d050b3e..53d0ff12d89 100644
--- a/lldb/unittests/Utility/TimerTest.cpp
+++ b/lldb/unittests/Utility/TimerTest.cpp
@@ -61,7 +61,9 @@ TEST(TimerTest, CategoryTimes2) {
   StreamString ss;
   Timer::DumpCategoryTimes(&ss);
   double seconds1, seconds2;
-  ASSERT_EQ(2, sscanf(ss.GetData(), "%lf sec for CAT1%*[\n ]%lf sec for CAT2",
+  ASSERT_EQ(2, sscanf(ss.GetData(),
+                      "%lf sec (total: %*lfs; child: %*lfs; count: %*d) for "
+                      "CAT1%*[\n ]%lf sec for CAT2",
                       &seconds1, &seconds2))
       << "String: " << ss.GetData();
   EXPECT_LT(0.01, seconds1);
@@ -69,3 +71,38 @@ TEST(TimerTest, CategoryTimes2) {
   EXPECT_LT(0.001, seconds2);
   EXPECT_GT(0.1, seconds2);
 }
+
+TEST(TimerTest, CategoryTimesStats) {
+  Timer::ResetCategoryTimes();
+  {
+    static Timer::Category tcat1("CAT1");
+    Timer t1(tcat1, ".");
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    static Timer::Category tcat2("CAT2");
+    {
+      Timer t2(tcat2, ".");
+      std::this_thread::sleep_for(std::chrono::milliseconds(10));
+    }
+    {
+      Timer t3(tcat2, ".");
+      std::this_thread::sleep_for(std::chrono::milliseconds(10));
+    }
+  }
+  // Example output:
+  // 0.105202764 sec (total: 0.132s; child: 0.027s; count: 1) for CAT1
+  // 0.026772798 sec (total: 0.027s; child: 0.000s; count: 2) for CAT2
+  StreamString ss;
+  Timer::DumpCategoryTimes(&ss);
+  double seconds1, total1, child1, seconds2;
+  int count1, count2;
+  ASSERT_EQ(
+      6, sscanf(ss.GetData(),
+                "%lf sec (total: %lfs; child: %lfs; count: %d) for CAT1%*[\n ]"
+                "%lf sec (total: %*lfs; child: %*lfs; count: %d) for CAT2",
+                &seconds1, &total1, &child1, &count1, &seconds2, &count2))
+      << "String: " << ss.GetData();
+  EXPECT_NEAR(total1 - child1, seconds1, 0.002);
+  EXPECT_EQ(1, count1);
+  EXPECT_NEAR(child1, seconds2, 0.002);
+  EXPECT_EQ(2, count2);
+}