package com.nr.test.test_chapter6;
import static com.nr.NRUtil.buildVector;
import static com.nr.sf.Elliptic.rc;
import static com.nr.sf.Elliptic.rf;
import static com.nr.test.NRTestUtil.maxel;
import static com.nr.test.NRTestUtil.vecsub;
import static org.junit.Assert.fail;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import com.nr.ran.Ran;
public class Test_rc {
@Before
public void setUp() throws Exception {
}
@After
public void tearDown() throws Exception {
}
@Test
public void test() {
int i,N=1000,M=15;
double x,y,sbeps;
double xx[]={0.5,0.5,0.5,1.0,1.0,1.0,2.0,2.0,2.0,
5.0,5.0,5.0,10.0,10.0,10.0};
double yy[]={0.5,5.0,10.0,0.5,5.0,10.0,0.5,5.0,10.0,
0.5,5.0,10.0,0.5,5.0,10.0};
double fingerprint[]={1.4142135623730949,0.58880582378346324,0.43646741450163296,
1.246450480280461,0.55357435889704532,0.41634859079941822,
1.0752916200648814,0.51157686594443497,0.39143618306709632,
0.85722388169844077,0.44721359549995793,0.35124073655203636,
0.70672482712931073,0.39416225082970491,0.31622776601683794};
double[] f1= new double[N],f2= new double[N],ff1 = new double[M],expect = buildVector(fingerprint);
boolean localflag, globalflag=false;
// Test rc
System.out.println("Testing rc");
// Test values against those of rf(x,y,z);
Ran myran = new Ran(17);
for (i=0;i<N;i++) {
x=10.0*myran.doub();
y=10.0*myran.doub();
f1[i]=rc(x,y);
f2[i]=rf(x,y,y);
}
System.out.printf("rc: Maximum discrepancy = %f\n", maxel(vecsub(f1,f2)));
sbeps=1.e-14;
localflag = maxel(vecsub(f1,f2)) > sbeps;
globalflag = globalflag || localflag;
if (localflag) {
fail("*** rc: Function rc(x,y) does not equal rf(x,y,y)");
}
// Fingerprint test
for (i=0;i<M;i++)
ff1[i]=rc(xx[i],yy[i]);
System.out.printf("rc: Fingerprint discrepancy = %f\n", maxel(vecsub(ff1,expect)));
localflag = maxel(vecsub(ff1,expect)) > sbeps;
globalflag = globalflag || localflag;
if (localflag) {
fail("*** rc: Fuction does not match previously computed fingerprint");
}
if (globalflag) System.out.println("Failed\n");
else System.out.println("Passed\n");
}
}