001/*
002 * $Id: FactorQuotientTest.java 5863 2018-07-20 11:13:34Z kredel $
003 */
004
005package edu.jas.ufd;
006
007
008import java.util.SortedMap;
009
010import junit.framework.Test;
011import junit.framework.TestCase;
012import junit.framework.TestSuite;
013
014import edu.jas.arith.BigRational;
015import edu.jas.kern.ComputerThreads;
016import edu.jas.poly.GenPolynomial;
017import edu.jas.poly.GenPolynomialRing;
018import edu.jas.poly.TermOrder;
019
020
021/**
022 * Factor quotient tests with JUnit.
023 * @author Heinz Kredel
024 */
025
026public class FactorQuotientTest extends TestCase {
027
028
029    /**
030     * main.
031     */
032    public static void main(String[] args) {
033        junit.textui.TestRunner.run(suite());
034    }
035
036
037    /**
038     * Constructs a <CODE>FactorQuotientTest</CODE> object.
039     * @param name String.
040     */
041    public FactorQuotientTest(String name) {
042        super(name);
043    }
044
045
046    /**
047     */
048    public static Test suite() {
049        TestSuite suite = new TestSuite(FactorQuotientTest.class);
050        return suite;
051    }
052
053
054    int rl = 1;
055
056
057    int kl = 3;
058
059
060    int ll = 3;
061
062
063    int el = 3;
064
065
066    float q = 0.4f;
067
068
069    QuotientRing<BigRational> efac;
070
071
072    GenPolynomialRing<BigRational> mfac;
073
074
075    @Override
076    protected void setUp() {
077        BigRational cfac = new BigRational(1);
078        TermOrder to = new TermOrder(TermOrder.INVLEX);
079        mfac = new GenPolynomialRing<BigRational>(cfac, rl, to);
080        efac = new QuotientRing<BigRational>(mfac);
081    }
082
083
084    @Override
085    protected void tearDown() {
086        //efac.terminate();
087        efac = null;
088        ComputerThreads.terminate();
089    }
090
091
092    /**
093     * Test dummy for Junit.
094     * 
095     */
096    public void xtestDummy() {
097    }
098
099
100    /**
101     * Test quotient coefficient polynomial factorization.
102     * 
103     */
104    public void testQuotientFactorization() {
105
106        TermOrder to = new TermOrder(TermOrder.INVLEX);
107        //BigRational cfac = new BigRational(1);
108
109        String[] var_x = new String[] { "x" };
110        GenPolynomialRing<Quotient<BigRational>> pfac = new GenPolynomialRing<Quotient<BigRational>>(efac, 1,
111                to, var_x);
112        //System.out.println("pfac   = " + pfac.toScript());
113
114        GenPolynomial<Quotient<BigRational>> a = pfac.random(kl, ll, el, q); // will be irreducible most times
115        //System.out.println("a      = " + a);
116        a = a.multiply(a.sum(pfac.getONE()));
117        //System.out.println("a      = " + a);
118
119        FactorAbstract<Quotient<BigRational>> engine = FactorFactory.getImplementation(efac);
120        //System.out.println("engine = " + engine);
121
122        SortedMap<GenPolynomial<Quotient<BigRational>>, Long> sm = engine.factors(a);
123        //System.out.println("factors(a) = " + sm);
124
125        assertTrue("#facs >= 1", sm.size() >= 1);
126
127        boolean t = engine.isFactorization(a, sm);
128        //System.out.println("t        = " + t);
129        assertTrue("prod(factor(a)) = a", t);
130    }
131
132}