Update RSI_Series to check for period != 0 before calculating RSI

Tests/Basic tests/Oscillators.cs

@@ -0,0 +1,158 @@
+using Xunit;
+using System;
+using System.Runtime.InteropServices;
+using QuanTAlib;
+
+namespace Basics;
+#nullable disable
+public class Oscillators
+{
+  private static Type[] maSeriesTypes = new Type[]
+  {
+    typeof(BIAS_Series),
+    typeof(MAX_Series),
+    typeof(MIN_Series),
+    typeof(MIDPOINT_Series),
+    typeof(ZL_Series),
+    typeof(DECAY_Series),
+    typeof(ENTROPY_Series),
+    typeof(KURTOSIS_Series),
+    typeof(MAD_Series),
+    typeof(MAPE_Series),
+    typeof(MSE_Series),
+    typeof(SDEV_Series),
+    typeof(SMAPE_Series),
+    typeof(WMAPE_Series),
+    typeof(SSDEV_Series),
+    typeof(VAR_Series),
+    typeof(SVAR_Series),
+    typeof(MEDIAN_Series),
+    typeof(ZSCORE_Series),
+    typeof(CMO_Series),
+    typeof(RSI_Series),
+    typeof(TRIX_Series),
+};
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void Name_exists(Type classType)
+  {
+    TSeries data = new("Data") {1,2,3};
+
+    var MA_Series = Activator.CreateInstance(classType, data, 5, false) as TSeries;
+    Assert.NotEmpty(MA_Series.Name);
+  }
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void Series_Length(Type classType)
+  {
+    GBM_Feed feed = new(1000);
+    TSeries data = feed.OHLC4;
+
+    var MA_Series = Activator.CreateInstance(classType, data, 5, false) as TSeries;
+    Assert.Equal(1000, MA_Series.Count);
+  }
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void Return_data(Type classType)
+  {
+    TSeries data = new() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
+
+    var MA_Series = Activator.CreateInstance(classType, data, 5, false) as TSeries;
+    var result = MA_Series.Add(20);
+    Assert.Equal(result.v, MA_Series.Last.v);
+  }
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void Update(Type classType)
+  {
+    TSeries data = new() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
+
+    var MA_Series = Activator.CreateInstance(classType, data, 5, false) as TSeries;
+    var pre_update = MA_Series.Last.v;
+
+    double pre_data = data.Last.v;
+    data.Add(20, true);
+    data.Add(pre_data, true);
+
+    Assert.Equal(pre_update, MA_Series.Last.v);
+    Assert.Equal(data.Count, MA_Series.Count);
+}
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void Period_zero(Type classType)
+  {
+    GBM_Feed feed = new(100);
+    TSeries data = feed.OHLC4;
+
+    var MA_Series = Activator.CreateInstance(classType, data, 0, false) as TSeries;
+    Assert.Equal(data.Count, MA_Series.Count);
+    Assert.False(double.IsNaN(MA_Series.Last.v));
+  }
+
+	[Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void Reset(Type classType)
+  {
+    GBM_Feed feed = new(10);
+    TSeries data = feed.OHLC4;
+    var MA_Series = Activator.CreateInstance(classType, data, 10, false) as TSeries;
+    MA_Series.Reset();
+    data.Add(1);
+		Assert.False(double.IsNaN(MA_Series.Last.v));
+}
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+	public void Period_one(Type classType)
+  {
+    GBM_Feed feed = new(100);
+    TSeries data = feed.OHLC4;
+
+    var MA_Series = Activator.CreateInstance(classType, data, 1, false) as TSeries;
+		Assert.False(double.IsNaN(MA_Series[^1].v));
+}
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void NaN_test(Type classType)
+  {
+    GBM_Feed feed = new(100);
+    TSeries data = feed.OHLC4;
+
+    var MA_Series = Activator.CreateInstance(classType, data, 10, true) as TSeries;
+    Assert.True(double.IsNaN(MA_Series[0].v));
+    Assert.True(double.IsNaN(MA_Series[8].v));
+    Assert.False(double.IsNaN(MA_Series[9].v));
+  }
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void Edge_numbers(Type classType)
+  {
+    TSeries data = new() { double.Epsilon, double.PositiveInfinity, double.MaxValue, double.NegativeInfinity };
+    var MA_Series = Activator.CreateInstance(classType, data, 10, true) as TSeries;
+    Assert.Equal(4, MA_Series.Count);
+  }
+
+  [Theory]
+  [MemberData(nameof(MASeriesData))]
+  public void handling_NaN(Type classType) {
+	  TSeries data = new("Name") { 1, 2, 3, 4, 5, 6, double.NaN, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 };
+var MA_Series = Activator.CreateInstance(classType, data, 10, true) as TSeries;
+	  Assert.False(double.IsNaN(MA_Series.Last.v));
+  }
+
+public static IEnumerable<object[]> MASeriesData()
+  {
+    foreach (var type in maSeriesTypes)
+    {
+      yield return new object[] { type };
+    }
+  }
+}
+#nullable restore