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TestIntegerField.javaAPI DocApache Poi 3.0.17162Mon Jan 01 12:39:46 GMT 2007org.apache.poi.util

TestIntegerField

public class TestIntegerField extends TestCase
Test IntegerField code
author
Marc Johnson (mjohnson at apache dot org)

Fields Summary
private static final int[]
_test_array
Constructors Summary
public TestIntegerField(String name)
Constructor

param
name

        super(name);
Methods Summary
public static voidmain(java.lang.String[] args)
Main

param
args

        System.out.println("Testing util.IntegerField functionality");
        junit.textui.TestRunner.run(TestIntegerField.class);
public voidtestConstructors()
Test constructors.


           

      
    
        try
        {
            new IntegerField(-1);
            fail("Should have caught ArrayIndexOutOfBoundsException");
        }
        catch (ArrayIndexOutOfBoundsException ignored_e)
        {

            // as expected
        }
        IntegerField field = new IntegerField(2);

        assertEquals(0, field.get());
        try
        {
            new IntegerField(-1, 1);
            fail("Should have caught ArrayIndexOutOfBoundsException");
        }
        catch (ArrayIndexOutOfBoundsException ignored_e)
        {

            // as expected
        }
        field = new IntegerField(2, 0x12345678);
        assertEquals(0x12345678, field.get());
        byte[] array = new byte[ 6 ];

        try
        {
            new IntegerField(-1, 1, array);
            fail("Should have caught ArrayIndexOutOfBoundsException");
        }
        catch (ArrayIndexOutOfBoundsException ignored_e)
        {

            // as expected
        }
        field = new IntegerField(2, 0x12345678, array);
        assertEquals(0x12345678, field.get());
        assertEquals(( byte ) 0x78, array[ 2 ]);
        assertEquals(( byte ) 0x56, array[ 3 ]);
        assertEquals(( byte ) 0x34, array[ 4 ]);
        assertEquals(( byte ) 0x12, array[ 5 ]);
        array = new byte[ 5 ];
        try
        {
            new IntegerField(2, 5, array);
            fail("should have gotten ArrayIndexOutOfBoundsException");
        }
        catch (ArrayIndexOutOfBoundsException ignored_e)
        {

            // as expected
        }
        for (int j = 0; j < _test_array.length; j++)
        {
            array = new byte[ 4 ];
            new IntegerField(0, _test_array[ j ], array);
            assertEquals(_test_array[ j ], new IntegerField(0, array).get());
        }
public voidtestReadFromBytes()
Test readFromBytes

        IntegerField field = new IntegerField(1);
        byte[]       array = new byte[ 4 ];

        try
        {
            field.readFromBytes(array);
            fail("should have caught ArrayIndexOutOfBoundsException");
        }
        catch (ArrayIndexOutOfBoundsException ignored_e)
        {

            // as expected
        }
        field = new IntegerField(0);
        for (int j = 0; j < _test_array.length; j++)
        {
            array[ 0 ] = ( byte ) (_test_array[ j ] % 256);
            array[ 1 ] = ( byte ) ((_test_array[ j ] >> 8) % 256);
            array[ 2 ] = ( byte ) ((_test_array[ j ] >> 16) % 256);
            array[ 3 ] = ( byte ) ((_test_array[ j ] >> 24) % 256);
            field.readFromBytes(array);
            assertEquals("testing " + j, _test_array[ j ], field.get());
        }
public voidtestReadFromStream()
Test readFromStream

exception
IOException

        IntegerField field  = new IntegerField(0);
        byte[]       buffer = new byte[ _test_array.length * 4 ];

        for (int j = 0; j < _test_array.length; j++)
        {
            buffer[ (j * 4) + 0 ] = ( byte ) (_test_array[ j ] % 256);
            buffer[ (j * 4) + 1 ] = ( byte ) ((_test_array[ j ] >> 8) % 256);
            buffer[ (j * 4) + 2 ] = ( byte ) ((_test_array[ j ] >> 16) % 256);
            buffer[ (j * 4) + 3 ] = ( byte ) ((_test_array[ j ] >> 24) % 256);
        }
        ByteArrayInputStream stream = new ByteArrayInputStream(buffer);

        for (int j = 0; j < buffer.length / 4; j++)
        {
            field.readFromStream(stream);
            assertEquals("Testing " + j, _test_array[ j ], field.get());
        }
public voidtestSet()
Test set() methods

        IntegerField field = new IntegerField(0);
        byte[]       array = new byte[ 4 ];

        for (int j = 0; j < _test_array.length; j++)
        {
            field.set(_test_array[ j ]);
            assertEquals("testing _1 " + j, _test_array[ j ], field.get());
            field = new IntegerField(0);
            field.set(_test_array[ j ], array);
            assertEquals("testing _2 ", _test_array[ j ], field.get());
            assertEquals("testing _3.0 " + _test_array[ j ],
                         ( byte ) (_test_array[ j ] % 256), array[ 0 ]);
            assertEquals("testing _3.1 " + _test_array[ j ],
                         ( byte ) ((_test_array[ j ] >> 8) % 256),
                         array[ 1 ]);
            assertEquals("testing _3.2 " + _test_array[ j ],
                         ( byte ) ((_test_array[ j ] >> 16) % 256),
                         array[ 2 ]);
            assertEquals("testing _3.3 " + _test_array[ j ],
                         ( byte ) ((_test_array[ j ] >> 24) % 256),
                         array[ 3 ]);
        }
public voidtestWriteToBytes()
test writeToBytes

        IntegerField field = new IntegerField(0);
        byte[]       array = new byte[ 4 ];

        for (int j = 0; j < _test_array.length; j++)
        {
            field.set(_test_array[ j ]);
            field.writeToBytes(array);
            int val = array[ 3 ] << 24;

            val &= 0xFF000000;
            val += (array[ 2 ] << 16) & 0x00FF0000;
            val += (array[ 1 ] << 8) & 0x0000FF00;
            val += (array[ 0 ] & 0x000000FF);
            assertEquals("testing ", _test_array[ j ], val);
        }