1 files changed, 73 insertions, 0 deletions
diff --git a/src/test/java/com/jsyn/dsp/TestSimpleDelay.java b/src/test/java/com/jsyn/dsp/TestSimpleDelay.java
new file mode 100644
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+++ b/src/test/java/com/jsyn/dsp/TestSimpleDelay.java
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+/*
+ * Copyright 2009 Phil Burk, Mobileer Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jsyn.dsp;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.jsyn.engine.SynthesisEngine;
+import com.jsyn.unitgen.Add;
+import com.jsyn.unitgen.Compare;
+import com.jsyn.unitgen.Divide;
+import com.jsyn.unitgen.Maximum;
+import com.jsyn.unitgen.Minimum;
+import com.jsyn.unitgen.Multiply;
+import com.jsyn.unitgen.MultiplyAdd;
+import com.jsyn.unitgen.PitchToFrequency;
+import com.jsyn.unitgen.PowerOfTwo;
+import com.jsyn.unitgen.Subtract;
+import com.jsyn.unitgen.UnitBinaryOperator;
+import com.softsynth.math.AudioMath;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author Phil Burk, (C) 2009 Mobileer Inc
+ */
+public class TestSimpleDelay {
+
+    @Test
+    public void testProcess() {
+        SimpleDelay delay = new SimpleDelay(3);
+        assertEquals(0.0f, delay.process(0.0f), 0.00001, "Start with zero");
+        assertEquals(0.0f, delay.process(0.7f), 0.00001, "Add an impulse");
+        assertEquals(0.0f, delay.process(0.0f), 0.00001, "Waiting 0");
+        assertEquals(0.0f, delay.process(0.0f), 0.00001, "Waiting 1");
+        assertEquals(0.7f, delay.process(0.0f), 0.00001, "Got it.");
+    }
+
+    @Test
+    public void testAddRead() {
+        SimpleDelay delay = new SimpleDelay(3);
+        assertEquals(0.0f, delay.read(0), 0.00001, "read[0]");
+        assertEquals(0.0f, delay.read(1), 0.00001, "read[1]");
+        assertEquals(0.0f, delay.read(2), 0.00001, "read[2]");
+        delay.write(1.23f);
+        assertEquals(1.23f, delay.read(0), 0.00001, "w0 read[0]");
+        assertEquals(0.0f, delay.read(1), 0.00001, "w0 read[1]");
+        assertEquals(0.0f, delay.read(2), 0.00001, "w0 read[2]");
+        delay.advance();
+        delay.write(0.0f);
+        assertEquals(0.0f, delay.read(0), 0.00001, "w1 read[0]");
+        assertEquals(1.23f, delay.read(1), 0.00001, "w1 read[1]");
+        assertEquals(0.0f, delay.read(2), 0.00001, "w1 read[2]");
+        delay.advance();
+        delay.write(0.567f);
+        assertEquals(0.567f, delay.read(0), 0.00001, "w1 read[0]");
+        assertEquals(0.0f, delay.read(1), 0.00001, "w1 read[1]");
+        assertEquals(1.23f, delay.read(2), 0.00001, "w1 read[2]");
+    }
+}