ANTOOZA-BACKEND/Tests/Application.Tests/YahooChartParserTests.cs

using Infrastructure.StockData;

namespace Application.Tests;

[TestClass]
public sealed class YahooChartParserTests
{
    [TestMethod]
    public void Parse_MapsMetaFields_LowercasesSymbol()
    {
        // Yahoo v8 chart 표준 응답 축약 (meta 만) — 실제 ^GSPC 응답 형태
        const string json = """
        {"chart":{"result":[{"meta":{"symbol":"^GSPC","regularMarketTime":1783543721,"gmtoffset":-14400,"regularMarketPrice":7482.71,"chartPreviousClose":7499.36,"regularMarketDayHigh":7488.51,"regularMarketDayLow":7421.82,"regularMarketVolume":2874621000}}],"error":null}}
        """;

        var q = YahooChartParser.Parse(json, "^GSPC");

        Assert.IsNotNull(q);
        Assert.AreEqual("^gspc", q.Symbol, "심볼은 소문자 정규화");
        Assert.AreEqual(7482.71m, q.Close);
        Assert.AreEqual(7488.51m, q.High);
        Assert.AreEqual(7421.82m, q.Low);
        Assert.AreEqual(2874621000L, q.Volume);
        Assert.AreEqual(7482.71m, q.Open, "시가 미제공 → 종가로 대체");
        Assert.AreEqual(2026, q.TradeDate.Year);
        Assert.AreEqual(7, q.TradeDate.Month);
    }

    [TestMethod]
    public void Parse_MissingPriceOrTime_ReturnsNull()
    {
        // 종가 없음
        Assert.IsNull(YahooChartParser.Parse("""{"chart":{"result":[{"meta":{"symbol":"^X","regularMarketTime":1783543721}}]}}""", "^X"));
        // 거래시각 없음
        Assert.IsNull(YahooChartParser.Parse("""{"chart":{"result":[{"meta":{"symbol":"^X","regularMarketPrice":100.0}}]}}""", "^X"));
    }

    [TestMethod]
    public void Parse_EmptyOrError_ReturnsNull()
    {
        Assert.IsNull(YahooChartParser.Parse("", "^X"));
        Assert.IsNull(YahooChartParser.Parse("   ", "^X"));
        Assert.IsNull(YahooChartParser.Parse("""{"chart":{"result":null,"error":{"code":"Not Found"}}}""", "^X"));
        Assert.IsNull(YahooChartParser.Parse("not json", "^X"));
    }
}