codabarbarcodetest.java

这是个国外JAVA爱好者写的条形码生成器

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Copyright (c) 2003, International Barcode Consortium
All rights reserved.

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package net.sourceforge.barbecue.linear.codabar;

import junit.framework.TestCase;
import net.sourceforge.barbecue.Barcode;
import net.sourceforge.barbecue.BarcodeException;
import net.sourceforge.barbecue.BlankModule;
import net.sourceforge.barbecue.GraphicsMock;
import net.sourceforge.barbecue.Module;
import net.sourceforge.barbecue.SeparatorModule;

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

public class CodabarBarcodeTest extends TestCase {
	private CodabarBarcode b;

	protected void setUp() throws Exception {
		super.setUp();
		b = new CodabarBarcode("A12345B");
	}

	public void testPreAmbleIsEmpty() throws Exception {
		assertEquals(new BlankModule(0), b.getPreAmble());
	}

	public void testPostAmbleIsEmpty() throws Exception {
		assertEquals(new BlankModule(0), b.getPostAmble());
	}

	public void testChecksumIsNull() throws Exception {
		assertNull(b.calculateChecksum());
	}

	public void testWidthCalculatedCorrectly() throws Exception {
		assertWidth("A", 10);
	}

	public void testStartStopCharsMustBeFirstAndLastChars() throws Exception {
		assertCanConstruct("A12345B");
		assertCanConstruct("A12345D");
		assertCanConstruct("A12345C");
		assertCanConstruct("B12345C");
		assertCanConstruct("B");

		assertCannotConstruct("1A2345");
		assertCannotConstruct("123A45");
		assertCannotConstruct("A123A45");
		assertCannotConstruct("123A45B");
		assertCannotConstruct("A12345BB");
		assertCannotConstruct("AB12345B");
		assertCannotConstruct("ABCD");
	}

	public void testAAndCUsedAsDefaultStartAndStopCharsIfDataContainsNoAlphas() throws Exception {
		Barcode barcode = new CodabarBarcode("1234");
		assertEquals("A1234C", barcode.getData());
	}

	public void testExtendedStartStopCharsAreAccepted() throws Exception {
		assertCanConstruct("a1234t");
		assertCanConstruct("b1234e");
		assertCanConstruct("c1234*");
		assertCanConstruct("d1234n");
	}

	public void testExtendedStartAndStopCharsAreShownInLabelAsOriginalCharsEvenThoughEncodedAsABCD() throws Exception {
		CodabarBarcode barcode = new CodabarBarcode("a1234*");
		assertEquals("a1234*", barcode.getLabel());
	}

	public void testBarcodeCannotContainCharsOutsideCodabarSet() throws Exception {
		assertCannotConstruct("B12345F");
	}

	public void testSpacesInDataAreIgnoredForEncodingButPreservedInTextOutput() throws Exception {
		String data = "123 123 123 123";
		assertCanConstruct(data);
		CodabarBarcode barcode = new CodabarBarcode(data);
		assertEquals(data, barcode.getLabel());
	}

	public void testSeparatorAddedBetweenModules() throws Exception {
		CodabarBarcode barcode = new CodabarBarcode("A");
		Module[] modules = barcode.encodeData();
		assertEquals(1, modules.length);
		assertEquals(new Module(new int[] {1, 1, 2, 2, 1, 2, 1}), modules[0]);

		barcode = new CodabarBarcode("AB");
		modules = barcode.encodeData();
		assertEquals(3, modules.length);
		assertEquals(new Module(new int[] {1, 1, 2, 2, 1, 2, 1}), modules[0]);
		assertEquals(new SeparatorModule(1), modules[1]);
		assertEquals(new Module(new int[] {1, 1, 1, 2, 1, 2, 2}), modules[2]);

		barcode = new CodabarBarcode("A123B");
		modules = barcode.encodeData();
		assertEquals(9, modules.length);
		assertEquals(new Module(new int[] {1, 1, 2, 2, 1, 2, 1}), modules[0]);
		assertEquals(new SeparatorModule(1), modules[1]);
		assertEquals(new SeparatorModule(1), modules[3]);
		assertEquals(new SeparatorModule(1), modules[5]);
		assertEquals(new SeparatorModule(1), modules[7]);
		assertEquals(new Module(new int[] {1, 1, 1, 2, 1, 2, 2}), modules[8]);
	}

	public void testNullAndEmptyDataRejected() throws Exception {
		assertCannotConstruct(null);
		assertCannotConstruct("");
	}

	public void testEncodingIsCorrect() throws Exception {
		String data = "A1234567890.+/:D";
		CodabarBarcode barcode = new CodabarBarcode(data);
		Module[] modules = barcode.encodeData();
		assertEquals(31, modules.length);
		int index = 0;
		StringCharacterIterator iter = new StringCharacterIterator(data);
		for (char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) {
			assertEquals(ModuleFactory.getModule(String.valueOf(c)), modules[index]);
			index += 2;
		}
	}

	public void testDrawPaintsCorrectBars() throws Exception {
		CodabarBarcode barcode = new CodabarBarcode("A123B");
		barcode.setBarWidth(1);
		barcode.setDrawingText(false);
		GraphicsMock g = new GraphicsMock();
		barcode.draw(g, 0, 0);
		int[] expected = new int[] {
			0, // Quiet zone
			1, 1, 2, 2, 1, 2, 1,	// A
			1, // Separator
			1, 1, 1, 1, 2, 2, 1,	// 1
			1, // Separator
			1, 1, 1, 2, 1, 1, 2,	// 2
			1, // Separator
			2, 2, 1, 1, 1, 1, 1,	// 3
			1, // Separator
			1, 1, 1, 2, 1, 2, 2,	// B
			0 // Quiet zone
		};
		List rects = g.getRects();
		assertEquals(41, rects.size());
		for (int i=0; i<rects.size(); i++) {
			Rectangle rectangle = (Rectangle) rects.get(i);
			assertEquals(expected[i], (int) rectangle.getWidth());
		}
	}

	private void assertWidth(String data, int expectedWidth) throws Exception {
		CodabarBarcode barcode = new CodabarBarcode(data);
		barcode.setBarWidth(1);
		assertEquals(expectedWidth, barcode.getWidth());
	}

	protected void assertCanConstruct(String data) {
		try {
			new CodabarBarcode(data);
		} catch (BarcodeException e) {
			e.printStackTrace();
			fail("Exception thrown attempting to construct barcode with data: " + data);
		}
	}

	protected void assertCannotConstruct(String data) {
		try {
			new CodabarBarcode(data);
			fail("Exception should have been thrown attempting to construct barcode with data: " + data);
		} catch (BarcodeException e) {
			// OK
		}
	}
}