Refactor validation tests for various indicators to utilize shared test data structure

lib/feeds/gbm/ValidationTestData.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Skender.Stock.Indicators;
+
+namespace QuanTAlib.Tests;
+
+public class ValidationTestData : IDisposable
+{
+    public TBarSeries Bars { get; }
+    public TSeries Data { get; }
+    public IReadOnlyList<Quote> SkenderQuotes { get; }
+    public ReadOnlyMemory<double> RawData { get; }
+
+    public ValidationTestData(int count = 5000, double startPrice = 1000000.0, double mu = 0.05, double sigma = 2.0, int seed = 123)
+    {
+        var gbm = new GBM(startPrice, mu, sigma, seed: seed);
+        Bars = gbm.Fetch(count, DateTime.UtcNow.Ticks, TimeSpan.FromMinutes(1));
+        Data = Bars.Close;
+        RawData = Data.Select(x => x.Value).ToArray();
+
+        var quotes = new List<Quote>();
+        for (int i = 0; i < Bars.Count; i++)
+        {
+            quotes.Add(new Quote
+            {
+                Date = new DateTime(Bars.Open.Times[i], DateTimeKind.Utc),
+                Open = (decimal)Bars.Open[i].Value,
+                High = (decimal)Bars.High[i].Value,
+                Low = (decimal)Bars.Low[i].Value,
+                Close = (decimal)Bars.Close[i].Value,
+                Volume = (decimal)Bars.Volume[i].Value
+            });
+        }
+        SkenderQuotes = quotes;
+    }
+
+    private bool _disposed;
+
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+
+    protected virtual void Dispose(bool disposing)
+    {
+        if (!_disposed)
+        {
+            if (disposing)
+            {
+                // Dispose managed state (managed objects)
+            }
+
+            _disposed = true;
+        }
+    }
+}