created some unit tests

ComiServUnitTest/PaginatedTests.cs

@@ -0,0 +1,87 @@
+using ComiServ.Models;
+using Microsoft.EntityFrameworkCore.Metadata.Conventions;
+using System.CodeDom;
+using System.Security.Policy;
+
+namespace ComiServUnitTest;
+
+[TestClass]
+public class PaginatedTests
+{
+	[TestMethod]
+	public void PageUnderUnderflow()
+	{
+		const int pageNum = 1;
+		const int pageSize = 20;
+		const int dataSize = 30;
+		var data = Enumerable.Range(0, dataSize).ToArray();
+		var page = new Paginated<int>(pageSize, pageNum, data);
+		Assert.IsTrue(page.Last);
+		Assert.AreEqual(pageSize, page.Max);
+		Assert.AreEqual(pageNum, page.Page);
+		Assert.AreEqual(10, page.Count);
+		Assert.AreEqual(page.Items.Count, page.Count);
+		Assert.AreEqual(20, page.Items.First());
+		Assert.AreEqual(data.Last(), page.Items.Last());
+	}
+	[TestMethod]
+	public void PageOverflow()
+	{
+		const int pageNum = 2;
+		const int pageSize = 30;
+		const int dataSize = 150;
+		var data = Enumerable.Range(0, dataSize).ToArray();
+		var page = new Paginated<int>(pageSize, pageNum, data);
+		Assert.IsFalse(page.Last);
+		Assert.AreEqual(pageSize, page.Max);
+		Assert.AreEqual(pageNum, page.Page);
+		Assert.AreEqual(pageSize, page.Count);
+		Assert.AreEqual(page.Items.Count, page.Count);
+		Assert.AreEqual(pageSize*pageNum, page.Items.First());
+		Assert.AreEqual(pageSize*(pageNum+1)-1, page.Items.Last());
+	}
+	[TestMethod]
+	public void PageExact()
+	{
+		const int pageNum = 1;
+		const int pageSize = 30;
+		const int dataSize = 60;
+		var data = Enumerable.Range(0, dataSize).ToArray();
+		var page = new Paginated<int>(pageSize, pageNum, data);
+		Assert.IsTrue(page.Last);
+		Assert.AreEqual(pageSize, page.Max);
+		Assert.AreEqual(pageNum, page.Page);
+		Assert.AreEqual(pageSize, page.Count);
+		Assert.AreEqual(page.Items.Count, page.Count);
+		Assert.AreEqual(pageSize * pageNum, page.Items.First());
+		Assert.AreEqual(data.Last(), page.Items.Last());
+	}
+	[TestMethod]
+	public void PageEmpty()
+	{
+		const int pageNum = 0;
+		const int pageSize = 10;
+		const int dataSize = 0;
+		var data = Enumerable.Range(0, dataSize).ToArray();
+		var page = new Paginated<int>(pageSize, pageNum, data);
+		Assert.IsTrue(page.Last);
+		Assert.AreEqual(pageSize, page.Max);
+		Assert.AreEqual(pageNum, page.Page);
+		Assert.AreEqual(page.Items.Count, page.Count);
+		Assert.IsFalse(page.Items.Any());
+	}
+	[TestMethod]
+	public void PageDoesntExist()
+	{
+		const int pageNum = 5;
+		const int pageSize = 20;
+		const int dataSize = 50;
+		var data = Enumerable.Range(0, dataSize).ToArray();
+		var page = new Paginated<int>(pageSize, pageNum, data);
+		Assert.IsTrue(page.Last);
+		Assert.AreEqual(pageSize, page.Max);
+		Assert.AreEqual(pageNum, page.Page);
+		Assert.AreEqual(page.Items.Count, page.Count);
+		Assert.IsFalse(page.Items.Any());
+	}
+}