package com.nr.test.test_chapter7;
import static com.nr.NRUtil.buildVector;
import static com.nr.stat.Stattests.chsone;
import static org.junit.Assert.fail;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.netlib.util.doubleW;
import com.nr.ran.HashAll;
public class Test_hashall {
@Before
public void setUp() throws Exception {
}
@After
public void tearDown() throws Exception {
}
@Test
public void test() {
int i,M=1024,N=100*M;
doubleW df = new doubleW(0);
doubleW chisq = new doubleW(0);
doubleW prob = new doubleW(0);
double average;
int[] arr = new int[N];
double[] bins = new double[M];
boolean localflag, globalflag=false;
// Test hashall
System.out.println("Testing hashall");
average=N/(double)(M);
double[] ebins =buildVector(M,average);
for (i=0;i<N;i++)
arr[i]=i+1;
HashAll.hashall(arr);
for (i=0;i<N;i++)
bins[(arr[i]&0x7FFFFFFF)%M] += 1.0; // XXX java do not have unsigned int.
chsone(bins,ebins,df,chisq,prob);
System.out.printf(" chisq,int32(): %f prob: %f\n",chisq.val, prob.val);
localflag = (prob.val < 0.05);
globalflag = globalflag || localflag;
if (localflag) {
fail("*** hashall: Test for randomness does not give a distribution with correct variance");
}
if (globalflag) System.out.println("Failed\n");
else System.out.println("Passed\n");
}
}