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using System;

using AwesomeAssertions;

using ICSharpCode.ILSpy.TextView;

using NUnit.Framework;

namespace ICSharpCode.ILSpy.Tests.TextView;

/// <summary>
/// The decompiler text output stops once it exceeds its LengthLimit, so a runaway decompile (a huge
/// type/namespace) can't hang or OOM the UI thread. (Regression: the Avalonia port had no limit.)
/// </summary>
[TestFixture]
public class OutputLengthLimitTests
{
	[Test]
	public void Write_Throws_Once_The_Length_Limit_Is_Exceeded()
	{
		var output = new AvaloniaEditTextOutput { LengthLimit = 10 };

		var act = () => {
			for (int i = 0; i < 100; i++)
				output.Write("0123456789");
		};

		act.Should().Throw<OutputLengthExceededException>();
	}

	[Test]
	public void Write_Does_Not_Throw_Below_The_Limit()
	{
		var output = new AvaloniaEditTextOutput { LengthLimit = 1000 };

		var act = () => {
			output.Write("short output");
			output.WriteLine();
		};

		act.Should().NotThrow();
	}

	[Test]
	public void Default_Limit_Is_Unlimited()
	{
		var output = new AvaloniaEditTextOutput();
		output.LengthLimit.Should().Be(int.MaxValue);
	}
}