using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ComiServ.Models;

namespace ComiServUnitTest.EntityTests;

[TestClass]
public class TruncatedTests
{
    [TestMethod]
    public void TruncationUnderflow()
    {
        const int truncMax = 20;
        const int dataSize = 10;
        var data = Enumerable.Range(0, dataSize).ToArray();
        var trunc = new Truncated<int>(truncMax, data);
        Assert.IsTrue(trunc.Complete);
        Assert.AreEqual(truncMax, trunc.Max);
        Assert.AreEqual(dataSize, trunc.Count);
        Assert.AreEqual(trunc.Items.Count, trunc.Count);
        Assert.AreEqual(data.First(), trunc.Items.First());
        Assert.AreEqual(data.Last(), trunc.Items.Last());
    }
    [TestMethod]
    public void TruncationOverflow()
    {
        const int truncMax = 20;
        const int dataSize = 30;
        var data = Enumerable.Range(0, dataSize).ToArray();
        var trunc = new Truncated<int>(truncMax, data);
        Assert.IsFalse(trunc.Complete);
        Assert.AreEqual(truncMax, trunc.Max);
        Assert.AreEqual(truncMax, trunc.Count);
        Assert.AreEqual(trunc.Items.Count, trunc.Count);
        Assert.AreEqual(data.First(), trunc.Items.First());
        Assert.AreEqual(truncMax - 1, trunc.Items.Last());
    }
    [TestMethod]
    public void TruncationExact()
    {
        const int truncMax = 5;
        const int dataSize = 5;
        var data = Enumerable.Range(0, dataSize).ToArray();
        var trunc = new Truncated<int>(truncMax, data);
        Assert.IsTrue(trunc.Complete);
        Assert.AreEqual(truncMax, trunc.Max);
        Assert.AreEqual(truncMax, trunc.Count);
        Assert.AreEqual(trunc.Items.Count, trunc.Count);
        Assert.AreEqual(data.First(), trunc.Items.First());
        Assert.AreEqual(data.Last(), trunc.Items.Last());
    }
    [TestMethod]
    public void TruncationEmpty()
    {
        const int truncMax = 5;
        const int dataSize = 0;
        var data = Enumerable.Range(0, dataSize).ToArray();
        var trunc = new Truncated<int>(truncMax, data);
        Assert.IsTrue(trunc.Complete);
        Assert.AreEqual(truncMax, trunc.Max);
        Assert.AreEqual(0, trunc.Count);
        Assert.AreEqual(trunc.Items.Count, trunc.Count);
    }
}