[metric] fix summary

include/ylt/metric/summary_impl.hpp

@@ -9,9 +9,6 @@
 #include <memory>
 #include <vector>
 
-#include "ylt/easylog.hpp"
-#include "ylt/metric/counter.hpp"
-
 namespace ylt::metric::detail {
 
 template <std::size_t frac_bit = 6>
@@ -316,15 +313,15 @@ class summary_impl {
     std::vector<float> result;
     result.reserve(rate_.size());
     float v = -float16_max;
-    for (auto e : rate_) {
-      if (e < 0) [[unlikely]] {
+    for (double e : rate_) {
+      if (std::isnan(e) || e < 0) {
         result.push_back(v);
         continue;
       }
-      else if (e > 1) {
+      else if (e > 1) [[unlikely]] {
         e = 1;
       }
-      auto target_count = std::min<int64_t>(e * count, count);
+      auto target_count = std::min<double>(e * count, count);
       while (true) {
         if (target_count <= count_now) [[unlikely]] {
           result.push_back(v);

src/metric/tests/test_metric.cpp

@@ -449,12 +449,16 @@ using my_manager = static_metric_manager<my_tag>;
 auto g_pair = my_manager::instance().create_metric_static<counter_t>(
     "test_g_counter", "");
 
-TEST_CASE("test no lable") {
+TEST_CASE("test no label") {
   {
     std::map<std::string, std::string> customMap = {};
     auto summary = std::make_shared<summary_t>(
         "test", "help", std::vector{0.5, 0.9, 0.95, 0.99}, customMap);
     summary->observe(100);
+    auto result = summary->get_rates();
+    for (auto&e: result) {
+      CHECK(e==100);
+    }
   }
   auto g_counter = g_pair.second;
   g_counter->inc();