modulo10test.java

这是个国外JAVA爱好者写的条形码生成器

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package net.sourceforge.barbecue;

import junit.framework.TestCase;
import net.sourceforge.barbecue.Modulo10;

import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
import java.util.List;
import java.awt.*;

public class Modulo10Test extends TestCase {
    
    public void testInvalidCharactersThrowsException() throws Exception {
        try {
            Modulo10.getMod10CheckDigit("L32774300042", 1, 3, true);
            fail();
        } catch(java.lang.NumberFormatException e) {
        }
        try {
            Modulo10.getMod10CheckDigit("L32774300042", 1, 3);
            fail();
        } catch(java.lang.NumberFormatException e) {
        }
        try {
            Modulo10.getMod10CheckDigit("L32774300042", 3);
            fail();
        } catch(java.lang.NumberFormatException e) {
        }
    }
    
    
    public void testCheckDigitCalculatedUsingMod10() throws Exception {
        // check the mod 10 checksum for '32774300042'
        assertEquals("6", String.valueOf(Modulo10.getMod10CheckDigit("32774300042", 1, 3, true)));
        
        // check the mod 10 checksum for '07567816412'
        // (0 * 1) + (7 * 3) + (5 * 1) + (6 * 3) + (7 * 1) + (8 * 3) + 
        // (1 * 1) + (6 * 3) + (4 * 1) + (1 * 3) + (2 * 1)
        // = 0 + 21 + 5 + 18 + 7 + 24 + 1 + 18 + 4 + 3 + 2
        // = 103
        // round up to 10 means it's 7
        assertEquals("7", String.valueOf(Modulo10.getMod10CheckDigit("07567816412", 1, 3, true)));
        
        // check the mod 10 checksum for '07567816412'
        // (0 * 3) + (7 * 1) + (5 * 3) + (6 * 1) + (7 * 3) + (8 * 1) + 
        // (1 * 3) + (6 * 1) + (4 * 3) + (1 * 1) + (2 * 3)
        // = 0 + 7 + 15 + 6 + 21 + 8 + 3 + 6 + 12 + 1 + 6
        // = 85
        // round up to 10 means it's 5
        assertEquals("5", String.valueOf(Modulo10.getMod10CheckDigit("07567816412", 1, 3, false)));
        
        // check the mod 10 checksum for '87070000002'
        // (8 * 1) + (7 * 3) + (0 * 1) + (7 * 3) + (0 * 1) + (0 * 3) + 
        // (0 * 1) + (0 * 3) + (0 * 1) + (0 * 3) + (2 * 1)
        // = 8 + 21 + 0 + 21 + 0 + 0 + 0 + 0 + 0 + 0 + 2
        // = 52
        // round up to 10 means it's 8
        assertEquals("8", String.valueOf(Modulo10.getMod10CheckDigit("87070000002", 1, 3, true)));
        
        // check the mod 10 checksum for '87070000002'
        // (8 * 3) + (7 * 1) + (0 * 3) + (7 * 1) + (0 * 3) + (0 * 1) + 
        // (0 * 3) + (0 * 1) + (0 * 3) + (0 * 1) + (2 * 3)
        // = 24 + 7 + 0 + 7 + 0 + 0 + 0 + 0 + 0 + 0 + 6
        // = 44
        // round up to 10 means it's 6
        assertEquals("6", String.valueOf(Modulo10.getMod10CheckDigit("87070000002", 1, 3, false)));
        
        // check the mod 10 checksum for '123456789'
        // (1 * 3) + (2 * 2) + (3 * 3) + (4 * 2) + (5 * 3) + (6 * 2) + 
        // (7 * 3) + (8 * 2) + (9 * 3)
        // = 3 + 4 + 9 + 8 + 15 + 12 + 21 + 16 + 27
        // = 115
        // round up to 10 means it's 5
        assertEquals("5", String.valueOf(Modulo10.getMod10CheckDigit("123456789", 3, 2, true)));

        // check the mod 10 checksum for '123456789'
        // (1 * 2) + (2 * 3) + (3 * 2) + (4 * 3) + (5 * 2) + (6 * 3) + 
        // (7 * 2) + (8 * 3) + (9 * 2)
        // = 2 + 6 + 6 + 12 + 10 + 18 + 14 + 24 + 18
        // = 110
        // round up to 10 means it's 0
        assertEquals("0", String.valueOf(Modulo10.getMod10CheckDigit("123456789", 3, 2, false)));
    }
 }