Package com.nr.test.test_chapter4

Source Code of com.nr.test.test_chapter4.Test_midsqu

package com.nr.test.test_chapter4;

import static com.nr.fi.Midpnt.qromo;
import static java.lang.Math.abs;
import static java.lang.Math.acos;
import static java.lang.Math.sqrt;
import static org.junit.Assert.fail;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.nr.UniVarRealValueFun;
import com.nr.fi.Midsqu;

public class Test_midsqu implements UniVarRealValueFun{

  @Before
  public void setUp() throws Exception {
  }

  @After
  public void tearDown() throws Exception {
  }

  @Test
  public void test() {
    // int i,j,M=14;
    double PI=acos(-1.0);
    double a,b,s,sbeps=1.e-10; //expect
    boolean localflag, globalflag=false;
   
   

    // Test midsqu
    System.out.println("Testing midsqu");

    a=0.5;
    b=1.0;
    Midsqu midsqu = new Midsqu(this,a,b);
    s=qromo(midsqu);

//    System.out.printf(s << endl;

    System.out.printf("midsqu: Maximum discrepancy = %f\n", abs(s-PI/2.0));
    localflag = abs(s-PI/2.0) > sbeps;
    globalflag = globalflag || localflag;
    if (localflag) {
      fail("*** midsqu: Failure to achieve expected accuracy in improper integral");
     
    }

    if (globalflag) System.out.println("Failed\n");
    else System.out.println("Passed\n");
  }
 
  // Test function
  public double funk(final double x) {
    return 1.0 / sqrt(x) / sqrt(1.0 - x);
  }
}
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