// Path: src/main/java/net/tradelib/functors/Sma.java
// public class Sma implements IMovingAverage {
//    private double mean;
//    private EvictingQueue<Double> cq;
//    private final int n;
//    private final double dn;
//    private int count;
//    
//    public Sma(int n) {
//       this.count = 0;
//       this.n = n;
//       this.dn = n;
//       this.mean = 0.0;
//       this.cq = EvictingQueue.create(this.n);
//    }
//    
//    public int getLength() { return n; }
//    public int getCount() { return count; }
//    
//    public double add(double value)
//    {
//       // The number of elements including the one added
//       ++count;
//       if(count > n) {
//          mean += (value - cq.peek()) / dn; 
//       } else if(count == n) {
//          mean += (value - mean) / dn; 
//       } else if(count > 1) {
//          mean += (value - mean) / count;
//       } else {
//          mean = value;
//       }
// 
//       // Add the value to the buffer
//       cq.add(value);
//       
//       return last();
//    }
//    
//    public double last() { return count >= n ? mean : Double.NaN; }
// }


import static org.junit.Assert.*;
import net.tradelib.functors.Sma;
import org.junit.Test;
// Copyright 2015 by Ivan Popivanov
//
// 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 net.tradelib.functors;



public class SmaTest {

   @Test
   public void test() {
      String [] inputs = {"124.41","125.34","125.68","125.92","127.32","129.32","131.65","131.39","129.65","131.07",
            "131.82","131.82","132.82","134.91","133.19","134.96","133.4","132.92","134.77","134.36"};
      String [] expected = {null,null,null,null,null,null,null,null,null,"128.175","128.916","129.564","130.278",
            "131.177","131.764","132.328","132.503","132.656","133.168","133.497"};
// Path: src/main/java/net/tradelib/functors/Sma.java
// public class Sma implements IMovingAverage {
//    private double mean;
//    private EvictingQueue<Double> cq;
//    private final int n;
//    private final double dn;
//    private int count;
//    
//    public Sma(int n) {
//       this.count = 0;
//       this.n = n;
//       this.dn = n;
//       this.mean = 0.0;
//       this.cq = EvictingQueue.create(this.n);
//    }
//    
//    public int getLength() { return n; }
//    public int getCount() { return count; }
//    
//    public double add(double value)
//    {
//       // The number of elements including the one added
//       ++count;
//       if(count > n) {
//          mean += (value - cq.peek()) / dn; 
//       } else if(count == n) {
//          mean += (value - mean) / dn; 
//       } else if(count > 1) {
//          mean += (value - mean) / count;
//       } else {
//          mean = value;
//       }
// 
//       // Add the value to the buffer
//       cq.add(value);
//       
//       return last();
//    }
//    
//    public double last() { return count >= n ? mean : Double.NaN; }
// }


// Path: src/test/java/net/tradelib/functors/SmaTest.java
import static org.junit.Assert.*;
import net.tradelib.functors.Sma;
import org.junit.Test;

// Copyright 2015 by Ivan Popivanov
//
// 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 net.tradelib.functors;



public class SmaTest {

   @Test
   public void test() {
      String [] inputs = {"124.41","125.34","125.68","125.92","127.32","129.32","131.65","131.39","129.65","131.07",
            "131.82","131.82","132.82","134.91","133.19","134.96","133.4","132.92","134.77","134.36"};
      String [] expected = {null,null,null,null,null,null,null,null,null,"128.175","128.916","129.564","130.278",
            "131.177","131.764","132.328","132.503","132.656","133.168","133.497"};
      Sma sma = new Sma(10);