Test: Add WeekDay-related tests.

Author: minichma

Ical.Net.Tests/DataTypeTest.cs

@@ -3,6 +3,7 @@
 // Licensed under the MIT license.
 //
 
+using System.Collections.Generic;
 using Ical.Net.DataTypes;
 using NUnit.Framework;
 
@@ -23,4 +24,35 @@ public void AttachmentConstructorMustAcceptNull()
         Assert.DoesNotThrow(() => { var o = new Attachment((byte[]) null); });
         Assert.DoesNotThrow(() => { var o = new Attachment((string) null); });
     }
-}
+
+    public static IEnumerable<TestCaseData> TestWeekDayEqualsTestCases => [
+        new(new WeekDay("MO"), new WeekDay("1MO")),
+        new(new WeekDay("1TU"), new WeekDay("-1TU")),
+        new(new WeekDay("2WE"), new WeekDay("-2WE")),
+        new(new WeekDay("TH"), new WeekDay("FR")),
+        new(new WeekDay("-5FR"), new WeekDay("FR")),
+        new(new WeekDay("SA"), null),
+    ];
+
+    [Test, TestCaseSource(nameof(TestWeekDayEqualsTestCases)), Category("DataType")]
+    public void TestWeekDayEquals(WeekDay w1, WeekDay w2)
+    {
+        Assert.Multiple(() =>
+        {
+            Assert.That(w1.Equals(w1), Is.True);
+            Assert.That(w1.Equals(w2), Is.False);
+        });
+    }
+
+    [Test, TestCaseSource(nameof(TestWeekDayEqualsTestCases)), Category("DataType")]
+    public void TestWeekDayCompareTo(WeekDay w1, WeekDay w2)
+    {
+        Assert.Multiple(() =>
+        {
+            Assert.That(w1.CompareTo(w1), Is.EqualTo(0));
+
+            if (w2 != null)
+                Assert.That(w1.CompareTo(w2), Is.Not.EqualTo(0));
+        });
+    }
+}