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microsoft · Sep 24, 2024 · e82c913 · e82c913
1 parent bbe833d
commit e82c913
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Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/src/libraries/Microsoft.PowerFx.Interpreter/Functions/Library.cs b/src/libraries/Microsoft.PowerFx.Interpreter/Functions/Library.cs
@@ -28,7 +28,7 @@ internal static partial class Library
         /// </summary>
         public static readonly TexlFunction DistinctInterpreterFunction = new DistinctFunction();
 
-        internal static readonly DateTime _epoch = new DateTime(1899, 12, 30, 0, 0, 0, 0);
+        internal static readonly DateTime _epoch = new DateTime(1899, 12, 30, 0, 0, 0, 0, DateTimeKind.Utc);
 
         // Helper to get a service or fallback to a default if the service is missing.
         private static T GetService<T>(this IServiceProvider services, T defaultService)

diff --git a/src/tests/Microsoft.PowerFx.Interpreter.Tests.Shared/ConfigTests.cs b/src/tests/Microsoft.PowerFx.Interpreter.Tests.Shared/ConfigTests.cs
@@ -35,6 +35,21 @@ public async Task BasicEvaluation()
             Assert.Equal(5.0, result.ToObject());
         }
 
+        [Fact]
+        public async Task TestDecimalToDateTimeCoercion()
+        {
+            // Per expression.
+            var engine = new RecalcEngine();
+            var rc = new RuntimeConfig();
+            rc.SetTimeZone(TimeZoneInfo.Utc);
+
+            var res = await engine.EvalAsync("If(false, DateTime(1899, 12, 30, 0, 0, 0, 0), 0)", CancellationToken.None, runtimeConfig: rc);
+
+            var dt = res.ToObject();
+
+            Assert.Equal(DateTimeKind.Utc, ((DateTime)dt).Kind);
+        }
+
         [Fact]
         public async Task BasicDirectEvalFunc()
         {