From 3d39472f46bae04ccf5c540dbab53ae5c1e2c383 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Fri, 6 Sep 2024 18:07:33 +0200
Subject: [PATCH] test: unit tests for creating a quantity from a `volatile`
 variable

---
 test/runtime/quantity_test.cpp | 6 ++++++
 test/static/quantity_test.cpp  | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/test/runtime/quantity_test.cpp b/test/runtime/quantity_test.cpp
index 151845a7..14dec787 100644
--- a/test/runtime/quantity_test.cpp
+++ b/test/runtime/quantity_test.cpp
@@ -73,3 +73,9 @@ TEST_CASE("Issue 474 is fixed", "[conversion][radical]")
   REQUIRE(within_4_ulps(sqrt(val_issue_474).numerical_value_in(m / s),
                         sqrt(val_issue_474.numerical_value_in(m * m / s / s))));
 }
+
+TEST_CASE("Volatile representation type", "[volatile]")
+{
+  volatile std::int16_t vint = 123;
+  REQUIRE(quantity(vint * m).numerical_value_in(m) == 123);
+}
diff --git a/test/static/quantity_test.cpp b/test/static/quantity_test.cpp
index caba5705..89f169bb 100644
--- a/test/static/quantity_test.cpp
+++ b/test/static/quantity_test.cpp
@@ -115,6 +115,10 @@ static_assert(quantity<isq::length[m]>::unit == si::metre);
 static_assert(is_same_v<quantity<isq::length[m]>::rep, double>);
 static_assert(is_same_v<quantity<isq::length[m], int>::rep, int>);
 
+[[maybe_unused]] volatile std::int16_t vint = 123;
+static_assert(is_same_v<decltype(quantity(vint * m))::rep, std::int16_t>);
+static_assert(is_same_v<decltype(quantity(vint, m))::rep, std::int16_t>);
+
 
 ////////////////////////////
 // static member functions