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/*
* Copyright (C) 2012.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 or
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
package uk.me.parabola.imgfmt.app.net;
import uk.me.parabola.imgfmt.app.BitWriter;
import org.junit.Test;
import static org.junit.Assert.*;
/**
* @author Steve Ratcliffe
*/
public class VarBitWriterTest {
private final BitWriter bw = new BitWriter();
@Test
public void testPositive() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
// should be able to write numbers up to 7
vbw.write(7);
byte b = bw.getBytes()[0];
assertEquals(b, 7);
}
@Test
public void testPositiveWithWidth() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.bitWidth = 1;
// should be able to write numbers up to 15
vbw.write(15);
byte b = bw.getBytes()[0];
assertEquals(b, 15);
}
@Test(expected = Abandon.class)
public void testPositiveWithWidthFail() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.bitWidth = 1;
// should be able to write numbers up to 15
vbw.write(16);
assertTrue(false);
}
@Test(expected=Abandon.class)
public void testPositiveFail() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
// should be able to write numbers up to 7
vbw.write(8);
assertTrue(false);
}
@Test
public void testNegative() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.negative = true;
// write up to -7
vbw.write(-7);
byte b = bw.getBytes()[0];
assertEquals(b, 7);
}
@Test(expected = Abandon.class)
public void testNegativeWithPositive() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.negative = true;
// positive numbers are invalid
vbw.write(7);
assertTrue(false);
}
@Test(expected = Abandon.class)
public void testNegativeTooBig() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.negative = true;
// number too large
vbw.write(8);
assertTrue(false);
}
@Test
public void testSignedPositive() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.signed = true;
// up to 7
vbw.write(7);
byte b = bw.getBytes()[0];
assertEquals(b, 7);
}
@Test
public void testSignedNegative() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.signed = true;
// up to -8
vbw.write(-8);
byte b = bw.getBytes()[0];
assertEquals(b, 0x8);
}
@Test(expected = Abandon.class)
public void testSignedPositiveTooBig() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.signed = true;
// up to 7, 8 too big
vbw.write(8);
assertTrue(false);
}
@Test(expected = Abandon.class)
public void testSignedNegativeTooBig() {
VarBitWriter vbw = new VarBitWriter(bw, 3);
vbw.signed = true;
// up to -8, -9 is too big
vbw.write(-9);
assertTrue(false);
}
}