add tests

Author: symbiogenesis

src/Controls/tests/Core.UnitTests/DateOnlyTypeConverterTests.cs

@@ -0,0 +1,33 @@
+#if NET6_0_OR_GREATER
+
+namespace Microsoft.Maui.Controls.Core.UnitTests;
+
+using System;
+using System.Globalization;
+using Xunit;
+
+public class DateOnlyTypeConverterTests : BaseTestFixture
+{
+	[Fact]
+	public void TestSucceeds()
+	{
+		var converter = new DateOnlyToDateTimeConverter();
+
+		var dateOnlyValue = new DateOnly(2025, 2, 21);
+
+		var actualDateTime = converter.ConvertFromInvariantString(dateOnlyValue.ToString(CultureInfo.InvariantCulture));
+		var expectedDateTime = new DateTime(2025, 2, 21);
+
+		Assert.Equal(expectedDateTime, actualDateTime);
+	}
+
+	[Fact]
+    public void TestConvertToInvariantStringThrowsNotSupportedException()
+    {
+        var converter = new DateOnlyToDateTimeConverter();
+        
+        var stringValue = "Not a DateOnly string";
+        
+        Assert.Throws<NotSupportedException>(() => converter.ConvertToInvariantString(stringValue));
+    }
+}

src/Controls/tests/Core.UnitTests/TimeOnlyTypeConverterTests.cs

@@ -0,0 +1,33 @@
+#if NET6_0_OR_GREATER
+
+namespace Microsoft.Maui.Controls.Core.UnitTests;
+
+using System;
+using System.Globalization;
+using Xunit;
+
+public class TimeOnlyTypeConverterTests : BaseTestFixture
+{
+	[Fact]
+	public void TestSucceeds()
+	{
+		var converter = new TimeOnlyToTimeSpanConverter();
+
+		var timeOnlyValue = new TimeOnly(8, 30, 0);
+
+		var actualTimeSpan = converter.ConvertFromInvariantString(timeOnlyValue.ToString(CultureInfo.InvariantCulture));
+		var expectedTimeSpan = new TimeSpan(8, 30, 0);
+
+		Assert.Equal(expectedTimeSpan, actualTimeSpan);
+	}
+
+	[Fact]
+    public void TestConvertToInvariantStringThrowsNotSupportedException()
+    {
+        var converter = new TimeOnlyToTimeSpanConverter();
+
+        var stringValue = "Not a DateOnly string";
+
+        Assert.Throws<NotSupportedException>(() => converter.ConvertToInvariantString(stringValue));
+    }
+}