using TermRemoteCtl.Agent.Terminal;

namespace TermRemoteCtl.Agent.Tests.Terminal;

public class TerminalFrameBatcherTests
{
    [Fact]
    public async Task FlushAsync_Combines_Multiple_Writes_Into_One_Frame()
    {
        var frames = new List<string>();
        await using var batcher = new TerminalFrameBatcher(
            TimeSpan.FromMilliseconds(33),
            frame =>
            {
                frames.Add(frame);
                return Task.CompletedTask;
            });

        batcher.Append("abc");
        batcher.Append("def");

        await batcher.FlushAsync();

        Assert.Equal(["abcdef"], frames);
    }

    [Fact]
    public async Task Append_Emits_Batched_Frame_After_Interval()
    {
        var frames = new List<string>();
        await using var batcher = new TerminalFrameBatcher(
            TimeSpan.FromMilliseconds(10),
            frame =>
            {
                frames.Add(frame);
                return Task.CompletedTask;
            });

        batcher.Append("hello");
        batcher.Append(" world");

        await Task.Delay(50);

        Assert.Equal(["hello world"], frames);
    }
}