ClaudeDo/tests/ClaudeDo.Worker.Tests/Runner/StreamAnalyzerTests.cs

using ClaudeDo.Worker.Runner;

namespace ClaudeDo.Worker.Tests.Runner;

public sealed class StreamAnalyzerTests
{
    [Fact]
    public void Extracts_Result_Markdown()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"result","result":"## Done","session_id":"sess-1"}""");
        var result = analyzer.GetResult();
        Assert.Equal("## Done", result.ResultMarkdown);
        Assert.Equal("sess-1", result.SessionId);
    }

    [Fact]
    public void Extracts_Structured_Output()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"result","result":"ok","structured_output":{"summary":"all good"},"session_id":"s1"}""");
        var result = analyzer.GetResult();
        Assert.Equal("ok", result.ResultMarkdown);
        Assert.Contains("all good", result.StructuredOutputJson);
    }

    [Fact]
    public void Counts_Assistant_Turns()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"assistant","message":"hi"}""");
        analyzer.ProcessLine("""{"type":"assistant","message":"working on it"}""");
        analyzer.ProcessLine("""{"type":"result","result":"done","session_id":"s1"}""");
        var result = analyzer.GetResult();
        Assert.Equal(2, result.TurnCount);
    }

    [Fact]
    public void Accumulates_Token_Usage()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"stream_event","event":{"type":"message_start","message":{"usage":{"input_tokens":100,"output_tokens":50}}}}""");
        analyzer.ProcessLine("""{"type":"stream_event","event":{"type":"message_start","message":{"usage":{"input_tokens":200,"output_tokens":80}}}}""");
        analyzer.ProcessLine("""{"type":"result","result":"done","session_id":"s1"}""");
        var result = analyzer.GetResult();
        Assert.Equal(300, result.TokensIn);
        Assert.Equal(130, result.TokensOut);
    }

    [Fact]
    public void Counts_Api_Retry_Events()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"system","subtype":"api_retry","attempt":1,"error":"rate_limit"}""");
        analyzer.ProcessLine("""{"type":"system","subtype":"api_retry","attempt":2,"error":"rate_limit"}""");
        analyzer.ProcessLine("""{"type":"result","result":"done","session_id":"s1"}""");
        var result = analyzer.GetResult();
        Assert.Equal(2, result.ApiRetryCount);
    }

    [Fact]
    public void Malformed_Json_Is_Ignored()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("not json {{{");
        analyzer.ProcessLine("");
        analyzer.ProcessLine("   ");
        var result = analyzer.GetResult();
        Assert.Null(result.ResultMarkdown);
        Assert.Equal(0, result.TurnCount);
    }

    [Fact]
    public void No_Result_Event_Returns_Null_Fields()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"assistant","message":"hi"}""");
        var result = analyzer.GetResult();
        Assert.Null(result.ResultMarkdown);
        Assert.Null(result.SessionId);
    }

    [Fact]
    public void Token_Usage_From_Result_Event()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"result","result":"done","session_id":"s1","usage":{"input_tokens":150,"output_tokens":75,"cache_read_input_tokens":0}}""");
        var result = analyzer.GetResult();
        Assert.Equal(150, result.TokensIn);
        Assert.Equal(75, result.TokensOut);
    }

    [Fact]
    public void Result_Usage_Overrides_Stream_Event_Accumulation()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"stream_event","event":{"type":"message_start","message":{"usage":{"input_tokens":10,"output_tokens":5}}}}""");
        analyzer.ProcessLine("""{"type":"result","result":"done","session_id":"s1","usage":{"input_tokens":200,"output_tokens":90}}""");
        var result = analyzer.GetResult();
        Assert.Equal(200, result.TokensIn);
        Assert.Equal(90, result.TokensOut);
    }

    [Fact]
    public void Empty_Result_Falls_Back_To_Structured_Output_Summary()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"result","result":"","structured_output":{"summary":"Task completed successfully.","data":{}},"session_id":"s1"}""");
        var result = analyzer.GetResult();
        Assert.Equal("Task completed successfully.", result.ResultMarkdown);
        Assert.Contains("summary", result.StructuredOutputJson);
    }

    [Fact]
    public void Empty_Result_Falls_Back_To_Full_Json_When_No_Summary()
    {
        var analyzer = new StreamAnalyzer();
        analyzer.ProcessLine("""{"type":"result","result":"","structured_output":{"output":"42"},"session_id":"s1"}""");
        var result = analyzer.GetResult();
        Assert.Contains("output", result.ResultMarkdown);
        Assert.Contains("42", result.ResultMarkdown);
    }
}