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Base64Test.javaAPI DocAndroid 5.1 API23804Thu Mar 12 22:22:12 GMT 2015android.util

Base64Test

public class Base64Test extends TestCase

Fields Summary
private static final String
TAG
private static final byte[]
BYTES
private static final String
lipsum
Constructors Summary
Methods Summary
public voidXXXtestEncodeInternal()
Tests that Base64.Encoder.encode() does correct handling of the tail for each call. This test is disabled because while it passes if you can get it to run, android's test infrastructure currently doesn't allow us to get at package-private members (Base64.Encoder in this case).

        byte[] input = { (byte) 0x61, (byte) 0x62, (byte) 0x63 };
        byte[] output = new byte[100];

        Base64.Encoder encoder = new Base64.Encoder(Base64.NO_PADDING | Base64.NO_WRAP,
                                                    output);

        encoder.process(input, 0, 3, false);
        assertEquals("YWJj".getBytes(), 4, encoder.output, encoder.op);
        assertEquals(0, encoder.tailLen);

        encoder.process(input, 0, 3, false);
        assertEquals("YWJj".getBytes(), 4, encoder.output, encoder.op);
        assertEquals(0, encoder.tailLen);

        encoder.process(input, 0, 1, false);
        assertEquals(0, encoder.op);
        assertEquals(1, encoder.tailLen);

        encoder.process(input, 0, 1, false);
        assertEquals(0, encoder.op);
        assertEquals(2, encoder.tailLen);

        encoder.process(input, 0, 1, false);
        assertEquals("YWFh".getBytes(), 4, encoder.output, encoder.op);
        assertEquals(0, encoder.tailLen);

        encoder.process(input, 0, 2, false);
        assertEquals(0, encoder.op);
        assertEquals(2, encoder.tailLen);

        encoder.process(input, 0, 2, false);
        assertEquals("YWJh".getBytes(), 4, encoder.output, encoder.op);
        assertEquals(1, encoder.tailLen);

        encoder.process(input, 0, 2, false);
        assertEquals("YmFi".getBytes(), 4, encoder.output, encoder.op);
        assertEquals(0, encoder.tailLen);

        encoder.process(input, 0, 1, true);
        assertEquals("YQ".getBytes(), 2, encoder.output, encoder.op);
private voidassertBad(java.lang.String in)
Assert that decoding 'in' throws IllegalArgumentException.

        try {
            byte[] out = Base64.decode(in, 0);
            fail("should have failed to decode");
        } catch (IllegalArgumentException e) {
        }
private voidassertEquals(byte[] expected, int len, byte[] actual)
Assert that actual equals the first len bytes of expected.

        assertEquals(len, actual.length);
        for (int i = 0; i < len; ++i) {
            assertEquals(expected[i], actual[i]);
        }
private voidassertEquals(byte[] expected, int len, byte[] actual, int alen)
Assert that actual equals the first len bytes of expected.

        assertEquals(len, alen);
        for (int i = 0; i < len; ++i) {
            assertEquals(expected[i], actual[i]);
        }
private voidassertEquals(byte[] expected, byte[] actual)
Assert that actual equals the first len bytes of expected.

        assertEquals(expected.length, actual.length);
        for (int i = 0; i < expected.length; ++i) {
            assertEquals(expected[i], actual[i]);
        }
private java.lang.StringdecodeString(java.lang.String in)
Decodes a string, returning a string.


           
          
        byte[] out = Base64.decode(in, 0);
        return new String(out);
private java.lang.StringencodeToString(java.lang.String in, int flags)
Encodes the string 'in' using 'flags'. Asserts that decoding gives the same string. Returns the encoded string.

        String b64 = Base64.encodeToString(in.getBytes(), flags);
        String dec = decodeString(b64);
        assertEquals(in, dec);
        return b64;
public voidtestBinaryDecode()


         
        assertEquals(BYTES, 0, Base64.decode("", 0));
        assertEquals(BYTES, 1, Base64.decode("/w==", 0));
        assertEquals(BYTES, 2, Base64.decode("/+4=", 0));
        assertEquals(BYTES, 3, Base64.decode("/+7d", 0));
        assertEquals(BYTES, 4, Base64.decode("/+7dzA==", 0));
        assertEquals(BYTES, 5, Base64.decode("/+7dzLs=", 0));
        assertEquals(BYTES, 6, Base64.decode("/+7dzLuq", 0));
        assertEquals(BYTES, 7, Base64.decode("/+7dzLuqmQ==", 0));
        assertEquals(BYTES, 8, Base64.decode("/+7dzLuqmYg=", 0));
public voidtestDecodeExtraChars()

        // padding 0
        assertEquals("hello, world", decodeString("aGVsbG8sIHdvcmxk"));
        assertBad("aGVsbG8sIHdvcmxk=");
        assertBad("aGVsbG8sIHdvcmxk==");
        assertBad("aGVsbG8sIHdvcmxk =");
        assertBad("aGVsbG8sIHdvcmxk = = ");
        assertEquals("hello, world", decodeString(" aGVs bG8s IHdv cmxk  "));
        assertEquals("hello, world", decodeString(" aGV sbG8 sIHd vcmx k "));
        assertEquals("hello, world", decodeString(" aG VsbG 8sIH dvcm xk "));
        assertEquals("hello, world", decodeString(" a GVsb G8sI Hdvc mxk "));
        assertEquals("hello, world", decodeString(" a G V s b G 8 s I H d v c m x k "));
        assertEquals("hello, world", decodeString("_a*G_V*s_b*G_8*s_I*H_d*v_c*m_x*k_"));
        assertEquals("hello, world", decodeString("aGVsbG8sIHdvcmxk"));

        // padding 1
        assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPyE="));
        assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPyE"));
        assertBad("aGVsbG8sIHdvcmxkPyE==");
        assertBad("aGVsbG8sIHdvcmxkPyE ==");
        assertBad("aGVsbG8sIHdvcmxkPyE = = ");
        assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E="));
        assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E"));
        assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E ="));
        assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E "));
        assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E = "));
        assertEquals("hello, world?!", decodeString("aGVsbG8sIHdvcmxkPy E   "));

        // padding 2
        assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkLg=="));
        assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkLg"));
        assertBad("aGVsbG8sIHdvcmxkLg=");
        assertBad("aGVsbG8sIHdvcmxkLg =");
        assertBad("aGVsbG8sIHdvcmxkLg = ");
        assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g=="));
        assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g"));
        assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g =="));
        assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g "));
        assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g = = "));
        assertEquals("hello, world.", decodeString("aGVsbG8sIHdvcmxkL g   "));
public voidtestFlags()

        assertEquals("YQ==\n",       encodeToString("a", 0));
        assertEquals("YQ==",         encodeToString("a", Base64.NO_WRAP));
        assertEquals("YQ\n",         encodeToString("a", Base64.NO_PADDING));
        assertEquals("YQ",           encodeToString("a", Base64.NO_PADDING | Base64.NO_WRAP));
        assertEquals("YQ==\r\n",     encodeToString("a", Base64.CRLF));
        assertEquals("YQ\r\n",       encodeToString("a", Base64.CRLF | Base64.NO_PADDING));

        assertEquals("YWI=\n",       encodeToString("ab", 0));
        assertEquals("YWI=",         encodeToString("ab", Base64.NO_WRAP));
        assertEquals("YWI\n",        encodeToString("ab", Base64.NO_PADDING));
        assertEquals("YWI",          encodeToString("ab", Base64.NO_PADDING | Base64.NO_WRAP));
        assertEquals("YWI=\r\n",     encodeToString("ab", Base64.CRLF));
        assertEquals("YWI\r\n",      encodeToString("ab", Base64.CRLF | Base64.NO_PADDING));

        assertEquals("YWJj\n",       encodeToString("abc", 0));
        assertEquals("YWJj",         encodeToString("abc", Base64.NO_WRAP));
        assertEquals("YWJj\n",       encodeToString("abc", Base64.NO_PADDING));
        assertEquals("YWJj",         encodeToString("abc", Base64.NO_PADDING | Base64.NO_WRAP));
        assertEquals("YWJj\r\n",     encodeToString("abc", Base64.CRLF));
        assertEquals("YWJj\r\n",     encodeToString("abc", Base64.CRLF | Base64.NO_PADDING));

        assertEquals("YWJjZA==\n",   encodeToString("abcd", 0));
        assertEquals("YWJjZA==",     encodeToString("abcd", Base64.NO_WRAP));
        assertEquals("YWJjZA\n",     encodeToString("abcd", Base64.NO_PADDING));
        assertEquals("YWJjZA",       encodeToString("abcd", Base64.NO_PADDING | Base64.NO_WRAP));
        assertEquals("YWJjZA==\r\n", encodeToString("abcd", Base64.CRLF));
        assertEquals("YWJjZA\r\n",   encodeToString("abcd", Base64.CRLF | Base64.NO_PADDING));
public voidtestInputStream()


         
        int[] flagses = { Base64.DEFAULT,
                          Base64.NO_PADDING,
                          Base64.NO_WRAP,
                          Base64.NO_PADDING | Base64.NO_WRAP,
                          Base64.CRLF,
                          Base64.URL_SAFE };
        int[] writeLengths = { -10, -5, -1, 0, 1, 1, 2, 2, 3, 10, 100 };
        Random rng = new Random(32176L);

        // Test input needs to be at least 2048 bytes to fill up the
        // read buffer of Base64InputStream.
        byte[] plain = (lipsum + lipsum + lipsum + lipsum + lipsum).getBytes();

        for (int flags: flagses) {
            byte[] encoded = Base64.encode(plain, flags);

            ByteArrayInputStream bais;
            Base64InputStream b64is;
            byte[] actual = new byte[plain.length * 2];
            int ap;
            int b;

            // ----- test decoding ("encoded" -> "plain") -----

            // read as much as it will give us in one chunk
            bais = new ByteArrayInputStream(encoded);
            b64is = new Base64InputStream(bais, flags);
            ap = 0;
            while ((b = b64is.read(actual, ap, actual.length-ap)) != -1) {
                ap += b;
            }
            assertEquals(actual, ap, plain);

            // read individual bytes
            bais = new ByteArrayInputStream(encoded);
            b64is = new Base64InputStream(bais, flags);
            ap = 0;
            while ((b = b64is.read()) != -1) {
                actual[ap++] = (byte) b;
            }
            assertEquals(actual, ap, plain);

            // mix reads of variously-sized arrays with one-byte reads
            bais = new ByteArrayInputStream(encoded);
            b64is = new Base64InputStream(bais, flags);
            ap = 0;
            readloop: while (true) {
                int l = writeLengths[rng.nextInt(writeLengths.length)];
                if (l >= 0) {
                    b = b64is.read(actual, ap, l);
                    if (b == -1) break readloop;
                    ap += b;
                } else {
                    for (int i = 0; i < -l; ++i) {
                        if ((b = b64is.read()) == -1) break readloop;
                        actual[ap++] = (byte) b;
                    }
                }
            }
            assertEquals(actual, ap, plain);

            // ----- test encoding ("plain" -> "encoded") -----

            // read as much as it will give us in one chunk
            bais = new ByteArrayInputStream(plain);
            b64is = new Base64InputStream(bais, flags, true);
            ap = 0;
            while ((b = b64is.read(actual, ap, actual.length-ap)) != -1) {
                ap += b;
            }
            assertEquals(actual, ap, encoded);

            // read individual bytes
            bais = new ByteArrayInputStream(plain);
            b64is = new Base64InputStream(bais, flags, true);
            ap = 0;
            while ((b = b64is.read()) != -1) {
                actual[ap++] = (byte) b;
            }
            assertEquals(actual, ap, encoded);

            // mix reads of variously-sized arrays with one-byte reads
            bais = new ByteArrayInputStream(plain);
            b64is = new Base64InputStream(bais, flags, true);
            ap = 0;
            readloop: while (true) {
                int l = writeLengths[rng.nextInt(writeLengths.length)];
                if (l >= 0) {
                    b = b64is.read(actual, ap, l);
                    if (b == -1) break readloop;
                    ap += b;
                } else {
                    for (int i = 0; i < -l; ++i) {
                        if ((b = b64is.read()) == -1) break readloop;
                        actual[ap++] = (byte) b;
                    }
                }
            }
            assertEquals(actual, ap, encoded);
        }
public voidtestLineLength()

        String in_56 = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd";
        String in_57 = in_56 + "e";
        String in_58 = in_56 + "ef";
        String in_59 = in_56 + "efg";
        String in_60 = in_56 + "efgh";
        String in_61 = in_56 + "efghi";

        String prefix = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXphYmNkZWZnaGlqa2xtbm9wcXJzdHV2d3h5emFi";
        String out_56 = prefix + "Y2Q=\n";
        String out_57 = prefix + "Y2Rl\n";
        String out_58 = prefix + "Y2Rl\nZg==\n";
        String out_59 = prefix + "Y2Rl\nZmc=\n";
        String out_60 = prefix + "Y2Rl\nZmdo\n";
        String out_61 = prefix + "Y2Rl\nZmdoaQ==\n";

        // no newline for an empty input array.
        assertEquals("", encodeToString("", 0));

        assertEquals(out_56, encodeToString(in_56, 0));
        assertEquals(out_57, encodeToString(in_57, 0));
        assertEquals(out_58, encodeToString(in_58, 0));
        assertEquals(out_59, encodeToString(in_59, 0));
        assertEquals(out_60, encodeToString(in_60, 0));
        assertEquals(out_61, encodeToString(in_61, 0));

        assertEquals(out_56.replaceAll("=", ""), encodeToString(in_56, Base64.NO_PADDING));
        assertEquals(out_57.replaceAll("=", ""), encodeToString(in_57, Base64.NO_PADDING));
        assertEquals(out_58.replaceAll("=", ""), encodeToString(in_58, Base64.NO_PADDING));
        assertEquals(out_59.replaceAll("=", ""), encodeToString(in_59, Base64.NO_PADDING));
        assertEquals(out_60.replaceAll("=", ""), encodeToString(in_60, Base64.NO_PADDING));
        assertEquals(out_61.replaceAll("=", ""), encodeToString(in_61, Base64.NO_PADDING));

        assertEquals(out_56.replaceAll("\n", ""), encodeToString(in_56, Base64.NO_WRAP));
        assertEquals(out_57.replaceAll("\n", ""), encodeToString(in_57, Base64.NO_WRAP));
        assertEquals(out_58.replaceAll("\n", ""), encodeToString(in_58, Base64.NO_WRAP));
        assertEquals(out_59.replaceAll("\n", ""), encodeToString(in_59, Base64.NO_WRAP));
        assertEquals(out_60.replaceAll("\n", ""), encodeToString(in_60, Base64.NO_WRAP));
        assertEquals(out_61.replaceAll("\n", ""), encodeToString(in_61, Base64.NO_WRAP));
public voidtestOutputStream()
Tests that Base64OutputStream produces exactly the same results as calling Base64.encode/.decode on an in-memory array.

        int[] flagses = { Base64.DEFAULT,
                          Base64.NO_PADDING,
                          Base64.NO_WRAP,
                          Base64.NO_PADDING | Base64.NO_WRAP,
                          Base64.CRLF,
                          Base64.URL_SAFE };
        int[] writeLengths = { -10, -5, -1, 0, 1, 1, 2, 2, 3, 10, 100 };
        Random rng = new Random(32176L);

        // Test input needs to be at least 1024 bytes to test filling
        // up the write(int) buffer of Base64OutputStream.
        byte[] plain = (lipsum + lipsum).getBytes();

        for (int flags: flagses) {
            byte[] encoded = Base64.encode(plain, flags);

            ByteArrayOutputStream baos;
            Base64OutputStream b64os;
            byte[] actual;
            int p;

            // ----- test encoding ("plain" -> "encoded") -----

            // one large write(byte[]) of the whole input
            baos = new ByteArrayOutputStream();
            b64os = new Base64OutputStream(baos, flags);
            b64os.write(plain);
            b64os.close();
            actual = baos.toByteArray();
            assertEquals(encoded, actual);

            // many calls to write(int)
            baos = new ByteArrayOutputStream();
            b64os = new Base64OutputStream(baos, flags);
            for (int i = 0; i < plain.length; ++i) {
                b64os.write(plain[i]);
            }
            b64os.close();
            actual = baos.toByteArray();
            assertEquals(encoded, actual);

            // intermixed sequences of write(int) with
            // write(byte[],int,int) of various lengths.
            baos = new ByteArrayOutputStream();
            b64os = new Base64OutputStream(baos, flags);
            p = 0;
            while (p < plain.length) {
                int l = writeLengths[rng.nextInt(writeLengths.length)];
                l = Math.min(l, plain.length-p);
                if (l >= 0) {
                    b64os.write(plain, p, l);
                    p += l;
                } else {
                    l = Math.min(-l, plain.length-p);
                    for (int i = 0; i < l; ++i) {
                        b64os.write(plain[p+i]);
                    }
                    p += l;
                }
            }
            b64os.close();
            actual = baos.toByteArray();
            assertEquals(encoded, actual);

            // ----- test decoding ("encoded" -> "plain") -----

            // one large write(byte[]) of the whole input
            baos = new ByteArrayOutputStream();
            b64os = new Base64OutputStream(baos, flags, false);
            b64os.write(encoded);
            b64os.close();
            actual = baos.toByteArray();
            assertEquals(plain, actual);

            // many calls to write(int)
            baos = new ByteArrayOutputStream();
            b64os = new Base64OutputStream(baos, flags, false);
            for (int i = 0; i < encoded.length; ++i) {
                b64os.write(encoded[i]);
            }
            b64os.close();
            actual = baos.toByteArray();
            assertEquals(plain, actual);

            // intermixed sequences of write(int) with
            // write(byte[],int,int) of various lengths.
            baos = new ByteArrayOutputStream();
            b64os = new Base64OutputStream(baos, flags, false);
            p = 0;
            while (p < encoded.length) {
                int l = writeLengths[rng.nextInt(writeLengths.length)];
                l = Math.min(l, encoded.length-p);
                if (l >= 0) {
                    b64os.write(encoded, p, l);
                    p += l;
                } else {
                    l = Math.min(-l, encoded.length-p);
                    for (int i = 0; i < l; ++i) {
                        b64os.write(encoded[p+i]);
                    }
                    p += l;
                }
            }
            b64os.close();
            actual = baos.toByteArray();
            assertEquals(plain, actual);
        }
public voidtestSingleByteReads()
http://b/3026478

        InputStream in = new Base64InputStream(
                new ByteArrayInputStream("/v8=".getBytes()), Base64.DEFAULT);
        assertEquals(254, in.read());
        assertEquals(255, in.read());
public voidtestWebSafe()

        assertEquals(BYTES, 0, Base64.decode("", Base64.URL_SAFE));
        assertEquals(BYTES, 1, Base64.decode("_w==", Base64.URL_SAFE));
        assertEquals(BYTES, 2, Base64.decode("_-4=", Base64.URL_SAFE));
        assertEquals(BYTES, 3, Base64.decode("_-7d", Base64.URL_SAFE));
        assertEquals(BYTES, 4, Base64.decode("_-7dzA==", Base64.URL_SAFE));
        assertEquals(BYTES, 5, Base64.decode("_-7dzLs=", Base64.URL_SAFE));
        assertEquals(BYTES, 6, Base64.decode("_-7dzLuq", Base64.URL_SAFE));
        assertEquals(BYTES, 7, Base64.decode("_-7dzLuqmQ==", Base64.URL_SAFE));
        assertEquals(BYTES, 8, Base64.decode("_-7dzLuqmYg=", Base64.URL_SAFE));

        assertEquals("", Base64.encodeToString(BYTES, 0, 0, Base64.URL_SAFE));
        assertEquals("_w==\n", Base64.encodeToString(BYTES, 0, 1, Base64.URL_SAFE));
        assertEquals("_-4=\n", Base64.encodeToString(BYTES, 0, 2, Base64.URL_SAFE));
        assertEquals("_-7d\n", Base64.encodeToString(BYTES, 0, 3, Base64.URL_SAFE));
        assertEquals("_-7dzA==\n", Base64.encodeToString(BYTES, 0, 4, Base64.URL_SAFE));
        assertEquals("_-7dzLs=\n", Base64.encodeToString(BYTES, 0, 5, Base64.URL_SAFE));
        assertEquals("_-7dzLuq\n", Base64.encodeToString(BYTES, 0, 6, Base64.URL_SAFE));
        assertEquals("_-7dzLuqmQ==\n", Base64.encodeToString(BYTES, 0, 7, Base64.URL_SAFE));
        assertEquals("_-7dzLuqmYg=\n", Base64.encodeToString(BYTES, 0, 8, Base64.URL_SAFE));