package com.nr.test.test_chapter3;
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.interp.Linear_interp;
import com.nr.ran.Ran;
public class Test_Linear_interp {
@Before
public void setUp() throws Exception {
}
@After
public void tearDown() throws Exception {
}
@Test
public void test() {
double sbeps=5.e-15;
int i,N=10;
double[] x=new double[N],y=new double[N],xx=new double[N],yy=new double[N],zz=new double[N];
boolean localflag, globalflag=false;
// Test Linear_interp
System.out.println("Testing Linear_interp");
for (i=0;i<N;i++) {
x[i]=(double)(i);
y[i]=2.0*(double)(i);
}
Linear_interp z = new Linear_interp(x,y);
Ran myran = new Ran(17);
for (i=0;i<N;i++) {
xx[i]=(N-1)*myran.doub();
yy[i]=z.interp(xx[i]); // interpolated values
zz[i]=2.0*xx[i]; // Correct values
}
localflag = maxel(vecsub(zz,yy)) > sbeps;
globalflag = globalflag || localflag;
if (localflag) {
fail("*** Linear_interp: interpolation of linear function unsuccessful.");
}
if (globalflag) System.out.println("Failed\n");
else System.out.println("Passed\n");
}
}