From 865bae8e30a04bba03796731887fee37afce6fe7 Mon Sep 17 00:00:00 2001
From: Swiftb0y <12380386+Swiftb0y@users.noreply.github.com>
Date: Tue, 29 Aug 2023 22:36:49 +0200
Subject: [PATCH] feat: add test for ensuring resolution of steady_clock

---
 CMakeLists.txt                            |  1 +
 src/test/chrono_clock_resolution_test.cpp | 29 +++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 src/test/chrono_clock_resolution_test.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f8841783c5b..a38d409bc4b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1823,6 +1823,7 @@ add_executable(mixxx-test
   src/test/broadcastsettings_test.cpp
   src/test/cache_test.cpp
   src/test/channelhandle_test.cpp
+  src/test/chrono_clock_resolution_test.cpp
   src/test/colorconfig_test.cpp
   src/test/colormapperjsproxy_test.cpp
   src/test/colorpalette_test.cpp
diff --git a/src/test/chrono_clock_resolution_test.cpp b/src/test/chrono_clock_resolution_test.cpp
new file mode 100644
index 00000000000..7ab5fabf28b
--- /dev/null
+++ b/src/test/chrono_clock_resolution_test.cpp
@@ -0,0 +1,29 @@
+#include <gtest/gtest.h>
+
+#include <algorithm>
+#include <chrono>
+#include <vector>
+
+using namespace std::chrono_literals;
+
+namespace {
+
+static constexpr auto kMinResolution = 1ms;
+static constexpr auto kNumIterations = 1000;
+
+} // namespace
+
+TEST(ChronoClockResolutionTest, SteadyClockTicksAreSmallerThan1Ms) {
+    std::vector<std::chrono::nanoseconds> ticks;
+    std::generate_n(std::back_inserter(ticks), kNumIterations, []() {
+        const auto start = std::chrono::steady_clock::now();
+        const auto end = std::chrono::steady_clock::now();
+        return end - start;
+    });
+    // Make sure there is no aliasing going on.
+    ASSERT_TRUE(std::all_of(ticks.begin(), ticks.end(), [](const auto& tick) {
+        return tick >= 0ns;
+    }));
+    // make sure that at least one duration is smaller than the minimum resolution
+    ASSERT_LT(*std::min_element(ticks.begin(), ticks.end()), kMinResolution);
+};