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third_party/spdlog/tests/test_stopwatch.cpp

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+#include "includes.h"
+#include "test_sink.h"
+#include "spdlog/stopwatch.h"
+
+TEST_CASE("stopwatch1", "[stopwatch]")
+{
+    using std::chrono::milliseconds;
+    using clock = std::chrono::steady_clock;
+    milliseconds wait_ms(200);
+    milliseconds tolerance_ms(250);
+    auto start = clock::now();
+    spdlog::stopwatch sw;
+    std::this_thread::sleep_for(wait_ms);
+    auto stop = clock::now();
+    auto diff_ms = std::chrono::duration_cast<milliseconds>(stop - start);
+    REQUIRE(sw.elapsed() >= diff_ms);
+    REQUIRE(sw.elapsed() <= diff_ms + tolerance_ms);
+}
+
+TEST_CASE("stopwatch2", "[stopwatch]")
+{
+    using spdlog::sinks::test_sink_st;
+    using std::chrono::duration_cast;
+    using std::chrono::milliseconds;
+    using clock = std::chrono::steady_clock;
+
+    clock::duration wait_duration(milliseconds(200));
+    clock::duration tolerance_duration(milliseconds(250));
+
+    auto test_sink = std::make_shared<test_sink_st>();
+
+    auto start = clock::now();
+    spdlog::stopwatch sw;
+    spdlog::logger logger("test-stopwatch", test_sink);
+    logger.set_pattern("%v");
+    std::this_thread::sleep_for(wait_duration);
+    auto stop = clock::now();
+    logger.info("{}", sw);
+    auto val = std::stod(test_sink->lines()[0]);
+    auto diff_duration = duration_cast<std::chrono::duration<double>>(stop - start);
+
+    REQUIRE(val >= (diff_duration).count() - 0.001);
+    REQUIRE(val <= (diff_duration + tolerance_duration).count());
+}