From 8494fa407542f78c173bc8db8a5f8475a43932fc Mon Sep 17 00:00:00 2001
From: Giorgos Sgouridis <giorgos@live.de>
Date: Fri, 18 Aug 2023 19:32:36 +0200
Subject: [PATCH] fix Test_EvenLength_CenterTwoAreSame

---
 src/FftSharp.Tests/Window.cs | 2 +-
 src/FftSharp/Window.cs       | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/FftSharp.Tests/Window.cs b/src/FftSharp.Tests/Window.cs
index de5ccac..1ee5a8f 100644
--- a/src/FftSharp.Tests/Window.cs
+++ b/src/FftSharp.Tests/Window.cs
@@ -86,7 +86,7 @@ public void Test_OddLength_CenterIndexIsBiggest()
         [Test]
         public void Test_EvenLength_CenterTwoAreSame()
         {
-            foreach (IWindow window in FftSharp.Window.GetWindows())
+            foreach (IWindow window in FftSharp.Window.GetSymmetricWindows())
             {
                 double[] values = window.Create(12);
                 Assert.AreEqual(values[5], values[6], 1e-5, window.Name);
diff --git a/src/FftSharp/Window.cs b/src/FftSharp/Window.cs
index 8ec8126..092bf3b 100644
--- a/src/FftSharp/Window.cs
+++ b/src/FftSharp/Window.cs
@@ -63,6 +63,13 @@ public static IWindow[] GetWindows()
                 .ToArray();
         }
 
+        public static IWindow[] GetSymmetricWindows()
+        {
+            return GetWindows()
+                .Where(x => !x.Name.Contains("Periodic"))
+                .ToArray();
+        }
+
         [Obsolete("This method is obsolete. Create a window in the Windows namespace and interact with its methods.")]
         public static double[] Rectangular(int pointCount) => new Windows.Rectangular().Create(pointCount);