From 3e6f11a4436528f5ffe4940d00520b21b18dedde Mon Sep 17 00:00:00 2001
From: Christoph Ruegg <git@cdrnet.ch>
Date: Tue, 17 Dec 2013 09:35:48 +0100
Subject: [PATCH] Generate: more tests, fix PeriodicMapSequence

---
 src/Numerics/Generate.cs       |  2 +-
 src/UnitTests/GenerateTests.cs | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/Numerics/Generate.cs b/src/Numerics/Generate.cs
index 455453ba..151b2621 100644
--- a/src/Numerics/Generate.cs
+++ b/src/Numerics/Generate.cs
@@ -348,7 +348,7 @@ namespace MathNet.Numerics
                 {
                     x %= amplitude;
                     phase = x;
-                    k = 0;
+                    k = 1;
                 }
 
                 yield return map(x);
diff --git a/src/UnitTests/GenerateTests.cs b/src/UnitTests/GenerateTests.cs
index a568cb0b..30f71e16 100644
--- a/src/UnitTests/GenerateTests.cs
+++ b/src/UnitTests/GenerateTests.cs
@@ -148,6 +148,18 @@ namespace MathNet.Numerics.UnitTests
             Assert.That(Generate.Periodic(8, 2.0, 0.25, Constants.Pi2).Select(Math.Sin), Is.EqualTo(new[] { 0.0, isq2, 1.0, isq2, 0.0, -isq2, -1.0, -isq2 }).Within(1e-12).AsCollection);
         }
 
+        [Test]
+        public void PeriodicConsistentWithSinusoidal()
+        {
+            Assert.That(
+                Generate.PeriodicMap(100, Math.Sin, 16.0, 2.0, Constants.Pi2),
+                Is.EqualTo(Generate.Sinusoidal(100, 16.0, 2.0, 1.0)).Within(1e-12).AsCollection);
+
+            Assert.That(
+                Generate.PeriodicMapSequence(Math.Sin, 16.0, 2.0, Constants.Pi2).Take(100).ToArray(),
+                Is.EqualTo(Generate.SinusoidalSequence(16.0, 2.0, 1.0).Take(100).ToArray()).Within(1e-12).AsCollection);
+        }
+
         [Test]
         public void PreiodicConsistentWithSequence()
         {