package edu.mines.jtk.opt.test;

import java.util.Random;

import junit.framework.TestCase;
import junit.framework.TestSuite;

import edu.mines.jtk.opt.*;
import edu.mines.jtk.util.Almost;

/** Unit tests for edu.mines.jtk.opt.ArrayVect1fs. */
public class ArrayVect1fsTest extends TestCase {

  /** Run test code. */
  public void testAll () {
    Random random = new Random(32525);
    {
      ArrayVect1f[] data = new ArrayVect1f[5];
      for (int j=0; j<data.length; ++j) {
        float[] a = new float[31];
        for (int i=0; i<a.length; ++i) {a[i] = random.nextFloat();}
        data[j] = new ArrayVect1f(a, j+3, ((j+4.)/3.));
      }
      ArrayVect1fs v = new ArrayVect1fs(data);
      VectUtil.test(v);
      v.dispose();
    }

    {
      ArrayVect1f[] data = new ArrayVect1f[5];
      for (int j=0; j<data.length; ++j) {
        float[] a = new float[31];
        for (int i=0; i<a.length; ++i) {a[i] = 1.f;}
        data[j] = new ArrayVect1f(a, 0, 3.);
      }
      ArrayVect1fs v = new ArrayVect1fs(data);
      VectUtil.test(v);
      Vect w = v.clone();
      w.multiplyInverseCovariance();
      assert Almost.FLOAT.equal(1./3., v.dot(w));
      assert Almost.FLOAT.equal(1./3., v.magnitude());
    }
  }

  // OPTIONAL OPTIONAL OPTIONAL OPTIONAL OPTIONAL OPTIONAL OPTIONAL

  /* Initialize objects used by all test methods */
  @Override protected void setUp() throws Exception { super.setUp();}

  /* Destruction of stuff used by all tests: rarely necessary */
  @Override protected void tearDown() throws Exception { super.tearDown();}

  // NO NEED TO CHANGE THE FOLLOWING

  /** Standard constructor calls TestCase(name) constructor 
      @param name Name of junit Test.
   */
  public ArrayVect1fsTest(String name) {super (name);}

  /** This automatically generates a suite of all "test" methods.
      @return A suite of all junit tests as a Test.
   */
  public static junit.framework.Test suite() {
    try {assert false; throw new IllegalStateException("need -ea");}
    catch (AssertionError e) {}
    return new TestSuite(ArrayVect1fsTest.class);
  }

  /** Run all tests with text gui if this class main is invoked 
      @param args Command-line arguments.
   */
  public static void main (String[] args) {
    junit.textui.TestRunner.run (suite());
  }
}