Recyclable.Collections.TestData.xUnit package added.

Recyclable.Collections.TestData.xUnit/ItemsCountTheoryData.cs

@@ -0,0 +1,15 @@
+using Xunit;
+
+namespace Recyclable.Collections.TestData.xUnit
+{
+	public class ItemsCountTheoryData : TheoryData<long>
+	{
+		public ItemsCountTheoryData()
+		{
+			foreach (var testCase in RecyclableLongListTestData.ItemsCountVariants)
+			{
+				Add(testCase);
+			}
+		}
+	}
+}