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TestBitVector.javaAPI DocApache Lucene 1.4.35313Tue Mar 30 00:48:08 BST 2004org.apache.lucene.util

TestBitVector

public class TestBitVector extends TestCase
TestBitVector tests the BitVector, obviously.
author
"Peter Mularien"
version
$Id: TestBitVector.java,v 1.3 2004/03/29 22:48:07 cutting Exp $

Fields Summary
Constructors Summary
public TestBitVector(String s)

        super(s);
    
Methods Summary
private booleandoCompare(org.apache.lucene.util.BitVector bv, org.apache.lucene.util.BitVector compare)
Compare two BitVectors. This should really be an equals method on the BitVector itself.

param
bv One bit vector
param
compare The second to compare

        boolean equal = true;
        for(int i=0;i<bv.size();i++) {
            // bits must be equal
            if(bv.get(i)!=compare.get(i)) {
                equal = false;
                break;
            }
        }
        return equal;
    
private voiddoTestClearVectorOfSize(int n)

        BitVector bv = new BitVector(n);
        for(int i=0;i<bv.size();i++) {
            // ensure a set bit is cleared
            assertFalse(bv.get(i));
            bv.set(i);
            assertTrue(bv.get(i));
            bv.clear(i);
            assertFalse(bv.get(i));
        }
    
private voiddoTestConstructOfSize(int n)

        BitVector bv = new BitVector(n);
        assertEquals(n,bv.size());
    
private voiddoTestCountVectorOfSize(int n)

        BitVector bv = new BitVector(n);
        // test count when incrementally setting bits
        for(int i=0;i<bv.size();i++) {
            assertFalse(bv.get(i));
            assertEquals(i,bv.count());
            bv.set(i);
            assertTrue(bv.get(i));
            assertEquals(i+1,bv.count());
        }

        bv = new BitVector(n);
        // test count when setting then clearing bits
        for(int i=0;i<bv.size();i++) {
            assertFalse(bv.get(i));
            assertEquals(0,bv.count());
            bv.set(i);
            assertTrue(bv.get(i));
            assertEquals(1,bv.count());
            bv.clear(i);
            assertFalse(bv.get(i));
            assertEquals(0,bv.count());
        }
    
private voiddoTestGetSetVectorOfSize(int n)

        BitVector bv = new BitVector(n);
        for(int i=0;i<bv.size();i++) {
            // ensure a set bit can be git'
            assertFalse(bv.get(i));
            bv.set(i);
            assertTrue(bv.get(i));
        }
    
private voiddoTestWriteRead(int n)

        Directory d = new  RAMDirectory();

        BitVector bv = new BitVector(n);
        // test count when incrementally setting bits
        for(int i=0;i<bv.size();i++) {
            assertFalse(bv.get(i));
            assertEquals(i,bv.count());
            bv.set(i);
            assertTrue(bv.get(i));
            assertEquals(i+1,bv.count());
            bv.write(d, "TESTBV");
            BitVector compare = new BitVector(d, "TESTBV");
            // compare bit vectors with bits set incrementally
            assertTrue(doCompare(bv,compare));
        }
    
public voidtestClear()
Test the clear() method on BitVectors of various sizes.

throws
Exception

        doTestClearVectorOfSize(8);
        doTestClearVectorOfSize(20);
        doTestClearVectorOfSize(100);
        doTestClearVectorOfSize(1000);
    
public voidtestConstructSize()
Test the default constructor on BitVectors of various sizes.

throws
Exception

        doTestConstructOfSize(8);
        doTestConstructOfSize(20);
        doTestConstructOfSize(100);
        doTestConstructOfSize(1000);
    
public voidtestCount()
Test the count() method on BitVectors of various sizes.

throws
Exception

        doTestCountVectorOfSize(8);
        doTestCountVectorOfSize(20);
        doTestCountVectorOfSize(100);
        doTestCountVectorOfSize(1000);
    
public voidtestGetSet()
Test the get() and set() methods on BitVectors of various sizes.

throws
Exception

        doTestGetSetVectorOfSize(8);
        doTestGetSetVectorOfSize(20);
        doTestGetSetVectorOfSize(100);
        doTestGetSetVectorOfSize(1000);
    
public voidtestWriteRead()
Test writing and construction to/from Directory.

throws
Exception

        doTestWriteRead(8);
        doTestWriteRead(20);
        doTestWriteRead(100);
        doTestWriteRead(1000);