Add tests for binary representation of SDL_bool

SDL3-CS.Tests/Program.cs

@@ -14,6 +14,9 @@ namespace SDL.Tests
             if (OperatingSystem.IsWindows())
                 Console.OutputEncoding = Encoding.UTF8;
 
+            Console.WriteLine($"SDL_FALSE is represented as 0x{SDL_OutOfMemory():X} (expected 0x{SDL_bool.SDL_FALSE:X})");
+            Console.WriteLine($"SDL_TRUE  is represented as 0x{SDL_ClearError():X} (expected 0x{SDL_bool.SDL_TRUE:X})");
+
             SDL_SetHint(SDL_HINT_WINDOWS_CLOSE_ON_ALT_F4, "null byte \0 in string"u8);
             Debug.Assert(SDL_GetHint(SDL_HINT_WINDOWS_CLOSE_ON_ALT_F4) == "null byte ");
 

SDL3-CS.Tests/TestSDLBool.cs

@@ -0,0 +1,39 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using NUnit.Framework;
+
+namespace SDL.Tests
+{
+    [TestFixture]
+    public class TestSDLBool
+    {
+        private SDL_bool invert(SDL_bool value) => value == SDL_bool.SDL_TRUE ? SDL_bool.SDL_FALSE : SDL_bool.SDL_TRUE;
+
+        [Test]
+        public void TestFalse()
+        {
+            Assert.That(SDL3.SDL_OutOfMemory(), Is.EqualTo(SDL_bool.SDL_FALSE));
+        }
+
+        [Test]
+        public void TestTrue()
+        {
+            Assert.That(SDL3.SDL_ClearError(), Is.EqualTo(SDL_bool.SDL_TRUE));
+        }
+
+        [Test]
+        public void TestStoreLoad([Values] SDL_bool value)
+        {
+            var props = SDL3.SDL_CreateProperties();
+            Assume.That(props, Is.Not.EqualTo(0));
+
+            var ret = SDL3.SDL_SetBooleanProperty(props, "test", value);
+            Assume.That(ret, Is.EqualTo(SDL_bool.SDL_TRUE));
+
+            Assert.That(SDL3.SDL_GetBooleanProperty(props, "test", invert(value)), Is.EqualTo(value));
+
+            SDL3.SDL_DestroyProperties(props);
+        }
+    }
+}