From 361ff5c3d1194de59afecf0bcc996d1e25a45196 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Mon, 5 Jun 2023 15:06:06 +0200
Subject: [PATCH] test: international system tests added

---
 .../systems/international/international.h     |  1 +
 test/unit_test/static/CMakeLists.txt          |  1 +
 test/unit_test/static/international_test.cpp  | 74 +++++++++++++++++++
 3 files changed, 76 insertions(+)
 create mode 100644 test/unit_test/static/international_test.cpp

diff --git a/src/systems/international/include/mp-units/systems/international/international.h b/src/systems/international/include/mp-units/systems/international/international.h
index 0b103eba..2660b6d6 100644
--- a/src/systems/international/include/mp-units/systems/international/international.h
+++ b/src/systems/international/include/mp-units/systems/international/international.h
@@ -35,6 +35,7 @@ inline constexpr struct dram : named_unit<"dr", mag<ratio(1, 16)> * ounce> {} dr
 inline constexpr struct grain : named_unit<"gr", mag<ratio(1, 7'000)> * pound> {} grain;
 
 // length
+// https://en.wikipedia.org/wiki/United_States_customary_units#Length
 inline constexpr struct yard : named_unit<"yd", mag<ratio{9'144, 10'000}> * si::metre> {} yard;
 inline constexpr struct foot : named_unit<"ft", mag<ratio{1, 3}> * yard> {} foot;
 inline constexpr struct inch : named_unit<"in", mag<ratio{1, 12}> * foot> {} inch;
diff --git a/test/unit_test/static/CMakeLists.txt b/test/unit_test/static/CMakeLists.txt
index f0677c36..17e4109e 100644
--- a/test/unit_test/static/CMakeLists.txt
+++ b/test/unit_test/static/CMakeLists.txt
@@ -48,6 +48,7 @@ add_library(
     hep_test.cpp
     iec80000_test.cpp
     imperial_test.cpp
+    international_test.cpp
     isq_test.cpp
     isq_angle_test.cpp
     # kind_test.cpp
diff --git a/test/unit_test/static/international_test.cpp b/test/unit_test/static/international_test.cpp
new file mode 100644
index 00000000..a159dbc4
--- /dev/null
+++ b/test/unit_test/static/international_test.cpp
@@ -0,0 +1,74 @@
+// The MIT License (MIT)
+//
+// Copyright (c) 2018 Mateusz Pusz
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#include <mp-units/math.h>
+#include <mp-units/systems/international/international.h>
+#include <mp-units/systems/si/constants.h>
+#include <mp-units/systems/si/units.h>
+
+template<class T>
+  requires mp_units::is_scalar<T>
+inline constexpr bool mp_units::is_vector<T> = true;
+
+namespace {
+
+using namespace mp_units;
+using namespace mp_units::international;
+using namespace mp_units::international::unit_symbols;
+
+// Mass
+static_assert(100'000'000 * isq::mass[lb] == 45'359'237 * isq::mass[si::kilogram]);
+static_assert(1 * isq::mass[lb] == 16 * isq::mass[oz]);
+static_assert(1 * isq::mass[oz] == 16 * isq::mass[dr]);
+static_assert(7'000 * isq::mass[gr] == 1 * isq::mass[lb]);
+
+// Length
+// https://en.wikipedia.org/wiki/United_States_customary_units#Length
+static_assert(20 * isq::length[twip] == 1 * isq::length[p]);
+static_assert(1000 * isq::length[mil] == 1 * isq::length[in]);
+static_assert(72 * isq::length[p] == 1 * isq::length[in]);
+static_assert(1 * isq::length[P] == 12 * isq::length[p]);
+static_assert(1 * isq::length[in] == 6 * isq::length[P]);
+static_assert(1 * isq::length[ft] == 12 * isq::length[in]);
+static_assert(1 * isq::length[yd] == 3 * isq::length[ft]);
+static_assert(10'000 * isq::length[yd] == 9'144 * isq::length[si::metre]);
+static_assert(1 * isq::length[mi] == 5280 * isq::length[ft]);
+static_assert(1 * isq::length[mi] == 1760 * isq::length[yd]);
+static_assert(1 * isq::length[le] == 15'840 * isq::length[ft]);
+static_assert(1 * isq::length[le] == 5280 * isq::length[yd]);
+
+// Nautical
+static_assert(1 * isq::length[nmi] == 1852 * isq::length[si::metre]);
+static_assert(1 * isq::speed[kn] == isq::length(1 * nmi) / isq::time(1 * si::hour));
+
+// Force
+static_assert(1 * isq::force[pdl] == isq::mass(1 * lb) * isq::length(1 * ft) / pow<2>(isq::time(1 * si::second)));
+static_assert(1 * isq::force[lbf] == isq::mass(1 * lb) * (1 * si::standard_gravity));
+static_assert(1 * isq::force[kip] == 1000 * isq::force[lbf]);
+
+// Pressure
+static_assert(1 * isq::pressure[psi] == isq::force(1 * lbf) / isq::area(1 * square(inch)));
+
+// Power
+static_assert(1 * isq::power[hp] == isq::length(33'000 * ft) * isq::force(1 * lbf) / isq::time(1 * si::minute));
+
+}  // namespace