TestBase64Codec.java

package com.fasterxml.jackson.core.base64;

import org.junit.Assert;

import com.fasterxml.jackson.core.*;

public class TestBase64Codec
    extends com.fasterxml.jackson.test.BaseTest
{
    public void testProps()
    {
        Base64Variant std = Base64Variants.MIME;
        // let's verify basic props of std cocec
        assertEquals("MIME", std.getName());
        assertEquals("MIME", std.toString());
        assertTrue(std.usesPadding());
        assertFalse(std.usesPaddingChar('X'));
        assertEquals('=', std.getPaddingChar());
        assertTrue(std.usesPaddingChar('='));
        assertEquals((byte) '=', std.getPaddingByte());
        assertEquals(76, std.getMaxLineLength());
    }

    public void testCharEncoding() throws Exception
    {
        Base64Variant std = Base64Variants.MIME;
        assertEquals(Base64Variant.BASE64_VALUE_INVALID, std.decodeBase64Char('?'));
        assertEquals(Base64Variant.BASE64_VALUE_INVALID, std.decodeBase64Char((int) '?'));
        assertEquals(Base64Variant.BASE64_VALUE_INVALID, std.decodeBase64Char((byte) '?'));

        assertEquals(0, std.decodeBase64Char('A'));
        assertEquals(1, std.decodeBase64Char((int) 'B'));
        assertEquals(2, std.decodeBase64Char((byte)'C'));

        assertEquals('/', std.encodeBase64BitsAsChar(63));
        assertEquals((byte) 'b', std.encodeBase64BitsAsByte(27));

        String EXP_STR = "HwdJ";
        int TRIPLET = 0x1F0749;
        StringBuilder sb = new StringBuilder();
        std.encodeBase64Chunk(sb, TRIPLET);
        assertEquals(EXP_STR, sb.toString());

        byte[] exp = EXP_STR.getBytes("UTF-8");
        byte[] act = new byte[exp.length];
        std.encodeBase64Chunk(TRIPLET, act, 0);
        Assert.assertArrayEquals(exp, act);
    }

    @SuppressWarnings("unused")
    public void testErrors() throws Exception
    {
        try {
            Base64Variant b = new Base64Variant("foobar", "xyz", false, '!', 24);
        } catch (IllegalArgumentException iae) {
            verifyException(iae, "length must be exactly");
        }
    }
}