// Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
// Licensed under the Apache License, Version 2.0.

using ImageMagick;
using Xunit;

namespace Magick.NET.Core.Tests;

public partial class EndianReaderTests
{
    public class TheReadStringMethod : EndianReaderTests
    {
        [Fact]
        public void ShouldReturnNullWhenBufferIsNotLongEnough()
        {
            var reader = new EndianReader(new byte[1] { 0 });

            var result = reader.ReadString(2);

            Assert.Null(result);
        }

        [Fact]
        public void ShouldReadString()
        {
            var reader = new EndianReader(new byte[12] { 77, 97, 103, 105, 99, 107, 46, 78, 69, 84, 0, 77 });

            var result = reader.ReadString(10);

            Assert.Equal("Magick.NET", result);
        }

        [Fact]
        public void ShouldChangeTheIndex()
        {
            var reader = new EndianReader(new byte[10] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 });

            reader.ReadString(10);

            Assert.Equal(10U, reader.Index);
        }
    }
}
