From 0e475f3f502d6f84744b9800d6c4fa058dd64043 Mon Sep 17 00:00:00 2001
From: Chris Thrasher <chrisjthrasher@gmail.com>
Date: Thu, 15 Sep 2022 10:11:17 -0600
Subject: [PATCH] Test reinterpreting an `sf::Color` as a `std::uint8_t*`

---
 test/Graphics/Color.cpp | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/test/Graphics/Color.cpp b/test/Graphics/Color.cpp
index b50684b79..f7b77a2cc 100644
--- a/test/Graphics/Color.cpp
+++ b/test/Graphics/Color.cpp
@@ -3,6 +3,7 @@
 #include <doctest/doctest.h>
 
 #include <GraphicsUtil.hpp>
+#include <vector>
 
 TEST_CASE("[Graphics] sf::Color")
 {
@@ -152,4 +153,27 @@ TEST_CASE("[Graphics] sf::Color")
 
         static_assert(sf::Color::Black == sf::Color(0, 0, 0, 255));
     }
+
+    SUBCASE("Reinterpret as std::uint8_t*")
+    {
+        static_assert(sizeof(sf::Color) == 4);
+        static_assert(alignof(sf::Color) == 1);
+
+        const std::vector<sf::Color> pixels = {{10, 11, 12, 13}, {14, 15, 16, 17}, {18, 19, 20, 21}};
+        const std::uint8_t*          begin  = reinterpret_cast<const std::uint8_t*>(pixels.data());
+        CHECK(begin[0] == pixels[0].r);
+        CHECK(begin[1] == pixels[0].g);
+        CHECK(begin[2] == pixels[0].b);
+        CHECK(begin[3] == pixels[0].a);
+
+        CHECK(begin[4] == pixels[1].r);
+        CHECK(begin[5] == pixels[1].g);
+        CHECK(begin[6] == pixels[1].b);
+        CHECK(begin[7] == pixels[1].a);
+
+        CHECK(begin[8] == pixels[2].r);
+        CHECK(begin[9] == pixels[2].g);
+        CHECK(begin[10] == pixels[2].b);
+        CHECK(begin[11] == pixels[2].a);
+    }
 }