EncoderTest.java
/*
* Copyright 2013 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.zxing.aztec.encoder;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.FormatException;
import com.google.zxing.ResultPoint;
import com.google.zxing.aztec.AztecDetectorResult;
import com.google.zxing.aztec.AztecWriter;
import com.google.zxing.aztec.decoder.Decoder;
import com.google.zxing.common.BitArray;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.DecoderResult;
import org.junit.Assert;
import org.junit.Test;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.EnumMap;
import java.util.Map;
import java.util.Random;
import java.util.regex.Pattern;
/**
* Aztec 2D generator unit tests.
*
* @author Rustam Abdullaev
* @author Frank Yellin
*/
public final class EncoderTest extends Assert {
private static final Charset ISO_8859_1 = StandardCharsets.ISO_8859_1;
private static final Charset UTF_8 = StandardCharsets.UTF_8;
private static final Charset SHIFT_JIS = Charset.forName("Shift_JIS");
private static final Charset ISO_8859_15 = Charset.forName("ISO-8859-15");
private static final Charset WINDOWS_1252 = Charset.forName("Windows-1252");
private static final Pattern DOTX = Pattern.compile("[^.X]");
private static final Pattern SPACES = Pattern.compile("\\s+");
private static final ResultPoint[] NO_POINTS = new ResultPoint[0];
// real life tests
@Test
public void testEncode1() {
testEncode("This is an example Aztec symbol for Wikipedia.", true, 3,
"X X X X X X X X \n" +
"X X X X X X X X X X \n" +
"X X X X X X X X X X X \n" +
"X X X X X X X X X X X \n" +
" X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X \n" +
"X X X X X X X X X X \n" +
" X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X \n" +
" X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X \n" +
" X X X \n" +
" X X X X X X X X X X \n" +
" X X X X X X X X X X \n");
}
@Test
public void testEncode2() {
testEncode("Aztec Code is a public domain 2D matrix barcode symbology" +
" of nominally square symbols built on a square grid with a " +
"distinctive square bullseye pattern at their center.", false, 6,
" X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X X X X X X X X X \n" +
" X X X X X X X X X X X X X X X X \n" +
"X X X X X X X X X X X X X \n");
}
@Test
public void testAztecWriter() throws Exception {
testWriter("Espa\u00F1ol", null, 25, true, 1); // Without ECI (implicit ISO-8859-1)
testWriter("Espa\u00F1ol", ISO_8859_1, 25, true, 1); // Explicit ISO-8859-1
testWriter("\u20AC 1 sample data.", WINDOWS_1252, 25, true, 2); // ISO-8859-1 can't encode Euro; Windows-1252 can
testWriter("\u20AC 1 sample data.", ISO_8859_15, 25, true, 2);
testWriter("\u20AC 1 sample data.", UTF_8, 25, true, 2);
testWriter("\u20AC 1 sample data.", UTF_8, 100, true, 3);
testWriter("\u20AC 1 sample data.", UTF_8, 300, true, 4);
testWriter("\u20AC 1 sample data.", UTF_8, 500, false, 5);
testWriter("The capital of Japan is named \u6771\u4EAC.", SHIFT_JIS, 25, true, 3);
// Test AztecWriter defaults
String data = "In ut magna vel mauris malesuada";
AztecWriter writer = new AztecWriter();
BitMatrix matrix = writer.encode(data, BarcodeFormat.AZTEC, 0, 0);
AztecCode aztec = Encoder.encode(data,
Encoder.DEFAULT_EC_PERCENT, Encoder.DEFAULT_AZTEC_LAYERS);
BitMatrix expectedMatrix = aztec.getMatrix();
assertEquals(matrix, expectedMatrix);
}
// synthetic tests (encode-decode round-trip)
@Test
public void testEncodeDecode1() throws Exception {
testEncodeDecode("Abc123!", true, 1);
}
@Test
public void testEncodeDecode2() throws Exception {
testEncodeDecode("Lorem ipsum. http://test/", true, 2);
}
@Test
public void testEncodeDecode3() throws Exception {
testEncodeDecode("AAAANAAAANAAAANAAAANAAAANAAAANAAAANAAAANAAAANAAAAN", true, 3);
}
@Test
public void testEncodeDecode4() throws Exception {
testEncodeDecode("http://test/~!@#*^%&)__ ;:'\"[]{}\\|-+-=`1029384", true, 4);
}
@Test
public void testEncodeDecode5() throws Exception {
testEncodeDecode("http://test/~!@#*^%&)__ ;:'\"[]{}\\|-+-=`1029384756<>/?abc"
+ "Four score and seven our forefathers brought forth", false, 5);
}
@Test
public void testEncodeDecode10() throws Exception {
testEncodeDecode("In ut magna vel mauris malesuada dictum. Nulla ullamcorper metus quis diam" +
" cursus facilisis. Sed mollis quam id justo rutrum sagittis. Donec laoreet rutrum" +
" est, nec convallis mauris condimentum sit amet. Phasellus gravida, justo et congue" +
" auctor, nisi ipsum viverra erat, eget hendrerit felis turpis nec lorem. Nulla" +
" ultrices, elit pellentesque aliquet laoreet, justo erat pulvinar nisi, id" +
" elementum sapien dolor et diam.", false, 10);
}
@Test
public void testEncodeDecode23() throws Exception {
testEncodeDecode("In ut magna vel mauris malesuada dictum. Nulla ullamcorper metus quis diam" +
" cursus facilisis. Sed mollis quam id justo rutrum sagittis. Donec laoreet rutrum" +
" est, nec convallis mauris condimentum sit amet. Phasellus gravida, justo et congue" +
" auctor, nisi ipsum viverra erat, eget hendrerit felis turpis nec lorem. Nulla" +
" ultrices, elit pellentesque aliquet laoreet, justo erat pulvinar nisi, id" +
" elementum sapien dolor et diam. Donec ac nunc sodales elit placerat eleifend." +
" Sed ornare luctus ornare. Vestibulum vehicula, massa at pharetra fringilla, risus" +
" justo faucibus erat, nec porttitor nibh tellus sed est. Ut justo diam, lobortis eu" +
" tristique ac, p.In ut magna vel mauris malesuada dictum. Nulla ullamcorper metus" +
" quis diam cursus facilisis. Sed mollis quam id justo rutrum sagittis. Donec" +
" laoreet rutrum est, nec convallis mauris condimentum sit amet. Phasellus gravida," +
" justo et congue auctor, nisi ipsum viverra erat, eget hendrerit felis turpis nec" +
" lorem. Nulla ultrices, elit pellentesque aliquet laoreet, justo erat pulvinar" +
" nisi, id elementum sapien dolor et diam. Donec ac nunc sodales elit placerat" +
" eleifend. Sed ornare luctus ornare. Vestibulum vehicula, massa at pharetra" +
" fringilla, risus justo faucibus erat, nec porttitor nibh tellus sed est. Ut justo" +
" diam, lobortis eu tristique ac, p. In ut magna vel mauris malesuada dictum. Nulla" +
" ullamcorper metus quis diam cursus facilisis. Sed mollis quam id justo rutrum" +
" sagittis. Donec laoreet rutrum est, nec convallis mauris condimentum sit amet." +
" Phasellus gravida, justo et congue auctor, nisi ipsum viverra erat, eget hendrerit" +
" felis turpis nec lorem. Nulla ultrices, elit pellentesque aliquet laoreet, justo" +
" erat pulvinar nisi, id elementum sapien dolor et diam.", false, 23);
}
@Test
public void testEncodeDecode31() throws Exception {
testEncodeDecode("In ut magna vel mauris malesuada dictum. Nulla ullamcorper metus quis diam" +
" cursus facilisis. Sed mollis quam id justo rutrum sagittis. Donec laoreet rutrum" +
" est, nec convallis mauris condimentum sit amet. Phasellus gravida, justo et congue" +
" auctor, nisi ipsum viverra erat, eget hendrerit felis turpis nec lorem. Nulla" +
" ultrices, elit pellentesque aliquet laoreet, justo erat pulvinar nisi, id" +
" elementum sapien dolor et diam. Donec ac nunc sodales elit placerat eleifend." +
" Sed ornare luctus ornare. Vestibulum vehicula, massa at pharetra fringilla, risus" +
" justo faucibus erat, nec porttitor nibh tellus sed est. Ut justo diam, lobortis eu" +
" tristique ac, p.In ut magna vel mauris malesuada dictum. Nulla ullamcorper metus" +
" quis diam cursus facilisis. Sed mollis quam id justo rutrum sagittis. Donec" +
" laoreet rutrum est, nec convallis mauris condimentum sit amet. Phasellus gravida," +
" justo et congue auctor, nisi ipsum viverra erat, eget hendrerit felis turpis nec" +
" lorem. Nulla ultrices, elit pellentesque aliquet laoreet, justo erat pulvinar" +
" nisi, id elementum sapien dolor et diam. Donec ac nunc sodales elit placerat" +
" eleifend. Sed ornare luctus ornare. Vestibulum vehicula, massa at pharetra" +
" fringilla, risus justo faucibus erat, nec porttitor nibh tellus sed est. Ut justo" +
" diam, lobortis eu tristique ac, p. In ut magna vel mauris malesuada dictum. Nulla" +
" ullamcorper metus quis diam cursus facilisis. Sed mollis quam id justo rutrum" +
" sagittis. Donec laoreet rutrum est, nec convallis mauris condimentum sit amet." +
" Phasellus gravida, justo et congue auctor, nisi ipsum viverra erat, eget hendrerit" +
" felis turpis nec lorem. Nulla ultrices, elit pellentesque aliquet laoreet, justo" +
" erat pulvinar nisi, id elementum sapien dolor et diam. Donec ac nunc sodales elit" +
" placerat eleifend. Sed ornare luctus ornare. Vestibulum vehicula, massa at" +
" pharetra fringilla, risus justo faucibus erat, nec porttitor nibh tellus sed est." +
" Ut justo diam, lobortis eu tristique ac, p.In ut magna vel mauris malesuada" +
" dictum. Nulla ullamcorper metus quis diam cursus facilisis. Sed mollis quam id" +
" justo rutrum sagittis. Donec laoreet rutrum est, nec convallis mauris condimentum" +
" sit amet. Phasellus gravida, justo et congue auctor, nisi ipsum viverra erat," +
" eget hendrerit felis turpis nec lorem. Nulla ultrices, elit pellentesque aliquet" +
" laoreet, justo erat pulvinar nisi, id elementum sapien dolor et diam. Donec ac" +
" nunc sodales elit placerat eleifend. Sed ornare luctus ornare. Vestibulum vehicula," +
" massa at pharetra fringilla, risus justo faucibus erat, nec porttitor nibh tellus" +
" sed est. Ut justo diam, lobortis eu tris. In ut magna vel mauris malesuada dictum." +
" Nulla ullamcorper metus quis diam cursus facilisis. Sed mollis quam id justo rutrum" +
" sagittis. Donec laoreet rutrum est, nec convallis mauris condimentum sit amet." +
" Phasellus gravida, justo et congue auctor, nisi ipsum viverra erat, eget" +
" hendrerit felis turpis nec lorem.", false, 31);
}
@Test
public void testGenerateModeMessage() {
testModeMessage(true, 2, 29, ".X .XXX.. ...X XX.. ..X .XX. .XX.X");
testModeMessage(true, 4, 64, "XX XXXXXX .X.. ...X ..XX .X.. XX..");
testModeMessage(false, 21, 660, "X.X.. .X.X..X..XX .XXX ..X.. .XXX. .X... ..XXX");
testModeMessage(false, 32, 4096, "XXXXX XXXXXXXXXXX X.X. ..... XXX.X ..X.. X.XXX");
}
@Test
public void testStuffBits() {
testStuffBits(5, ".X.X. X.X.X .X.X.",
".X.X. X.X.X .X.X.");
testStuffBits(5, ".X.X. ..... .X.X",
".X.X. ....X ..X.X");
testStuffBits(3, "XX. ... ... ..X XXX .X. ..",
"XX. ..X ..X ..X ..X .XX XX. .X. ..X");
testStuffBits(6, ".X.X.. ...... ..X.XX",
".X.X.. .....X. ..X.XX XXXX.");
testStuffBits(6, ".X.X.. ...... ...... ..X.X.",
".X.X.. .....X .....X ....X. X.XXXX");
testStuffBits(6, ".X.X.. XXXXXX ...... ..X.XX",
".X.X.. XXXXX. X..... ...X.X XXXXX.");
testStuffBits(6,
"...... ..XXXX X..XX. .X.... .X.X.X .....X .X.... ...X.X .....X ....XX ..X... ....X. X..XXX X.XX.X",
".....X ...XXX XX..XX ..X... ..X.X. X..... X.X... ....X. X..... X....X X..X.. .....X X.X..X XXX.XX .XXXXX");
}
@Test
public void testHighLevelEncode() throws FormatException {
testHighLevelEncodeString("A. b.",
// 'A' P/S '. ' L/L b D/L '.'
"...X. ..... ...XX XXX.. ...XX XXXX. XX.X");
testHighLevelEncodeString("Lorem ipsum.",
// 'L' L/L 'o' 'r' 'e' 'm' ' ' 'i' 'p' 's' 'u' 'm' D/L '.'
".XX.X XXX.. X.... X..XX ..XX. .XXX. ....X .X.X. X...X X.X.. X.XX. .XXX. XXXX. XX.X");
testHighLevelEncodeString("Lo. Test 123.",
// 'L' L/L 'o' P/S '. ' U/S 'T' 'e' 's' 't' D/L ' ' '1' '2' '3' '.'
".XX.X XXX.. X.... ..... ...XX XXX.. X.X.X ..XX. X.X.. X.X.X XXXX. ...X ..XX .X.. .X.X XX.X");
testHighLevelEncodeString("Lo...x",
// 'L' L/L 'o' D/L '.' '.' '.' U/L L/L 'x'
".XX.X XXX.. X.... XXXX. XX.X XX.X XX.X XXX. XXX.. XX..X");
testHighLevelEncodeString(". x://abc/.",
//P/S '. ' L/L 'x' P/S ':' P/S '/' P/S '/' 'a' 'b' 'c' P/S '/' D/L '.'
"..... ...XX XXX.. XX..X ..... X.X.X ..... X.X.. ..... X.X.. ...X. ...XX ..X.. ..... X.X.. XXXX. XX.X");
// Uses Binary/Shift rather than Lower/Shift to save two bits.
testHighLevelEncodeString("ABCdEFG",
//'A' 'B' 'C' B/S =1 'd' 'E' 'F' 'G'
"...X. ...XX ..X.. XXXXX ....X .XX..X.. ..XX. ..XXX .X...");
testHighLevelEncodeString(
// Found on an airline boarding pass. Several stretches of Binary shift are
// necessary to keep the bitcount so low.
"09 UAG ^160MEUCIQC0sYS/HpKxnBELR1uB85R20OoqqwFGa0q2uEi"
+ "Ygh6utAIgLl1aBVM4EOTQtMQQYH9M2Z3Dp4qnA/fwWuQ+M8L3V8U=",
823);
}
@Test
public void testHighLevelEncodeBinary() throws FormatException {
// binary short form single byte
testHighLevelEncodeString("N\0N",
// 'N' B/S =1 '\0' N
".XXXX XXXXX ....X ........ .XXXX"); // Encode "N" in UPPER
testHighLevelEncodeString("N\0n",
// 'N' B/S =2 '\0' 'n'
".XXXX XXXXX ...X. ........ .XX.XXX."); // Encode "n" in BINARY
// binary short form consecutive bytes
testHighLevelEncodeString("N\0\u0080 A",
// 'N' B/S =2 '\0' \u0080 ' ' 'A'
".XXXX XXXXX ...X. ........ X....... ....X ...X.");
// binary skipping over single character
testHighLevelEncodeString("\0a\u00FF\u0080 A",
// B/S =4 '\0' 'a' '\3ff' '\200' ' ' 'A'
"XXXXX ..X.. ........ .XX....X XXXXXXXX X....... ....X ...X.");
// getting into binary mode from digit mode
testHighLevelEncodeString("1234\0",
//D/L '1' '2' '3' '4' U/L B/S =1 \0
"XXXX. ..XX .X.. .X.X .XX. XXX. XXXXX ....X ........"
);
// Create a string in which every character requires binary
StringBuilder sb = new StringBuilder();
for (int i = 0; i <= 3000; i++) {
sb.append((char) (128 + (i % 30)));
}
// Test the output generated by Binary/Switch, particularly near the
// places where the encoding changes: 31, 62, and 2047+31=2078
for (int i : new int[] { 1, 2, 3, 10, 29, 30, 31, 32, 33,
60, 61, 62, 63, 64, 2076, 2077, 2078, 2079, 2080, 2100 }) {
// This is the expected length of a binary string of length "i"
int expectedLength = (8 * i) +
((i <= 31) ? 10 : (i <= 62) ? 20 : (i <= 2078) ? 21 : 31);
// Verify that we are correct about the length.
testHighLevelEncodeString(sb.substring(0, i), expectedLength);
if (i != 1 && i != 32 && i != 2079) {
// The addition of an 'a' at the beginning or end gets merged into the binary code
// in those cases where adding another binary character only adds 8 or 9 bits to the result.
// So we exclude the border cases i=1,32,2079
// A lower case letter at the beginning will be merged into binary mode
testHighLevelEncodeString('a' + sb.substring(0, i - 1), expectedLength);
// A lower case letter at the end will also be merged into binary mode
testHighLevelEncodeString(sb.substring(0, i - 1) + 'a', expectedLength);
}
// A lower case letter at both ends will enough to latch us into LOWER.
testHighLevelEncodeString('a' + sb.substring(0, i) + 'b', expectedLength + 15);
}
sb = new StringBuilder();
for (int i = 0; i < 32; i++) {
sb.append('��'); // �� forces binary encoding
}
sb.setCharAt(1, 'A');
// expect B/S(1) A B/S(30)
testHighLevelEncodeString(sb.toString(), 5 + 20 + 31 * 8);
sb = new StringBuilder();
for (int i = 0; i < 31; i++) {
sb.append('��');
}
sb.setCharAt(1, 'A');
// expect B/S(31)
testHighLevelEncodeString(sb.toString(), 10 + 31 * 8);
sb = new StringBuilder();
for (int i = 0; i < 34; i++) {
sb.append('��');
}
sb.setCharAt(1, 'A');
// expect B/S(31) B/S(3)
testHighLevelEncodeString(sb.toString(), 20 + 34 * 8);
sb = new StringBuilder();
for (int i = 0; i < 64; i++) {
sb.append('��');
}
sb.setCharAt(30, 'A');
// expect B/S(64)
testHighLevelEncodeString(sb.toString(), 21 + 64 * 8);
}
@Test
public void testHighLevelEncodePairs() throws FormatException {
// Typical usage
testHighLevelEncodeString("ABC. DEF\r\n",
// A B C P/S .<sp> D E F P/S \r\n
"...X. ...XX ..X.. ..... ...XX ..X.X ..XX. ..XXX ..... ...X.");
// We should latch to PUNCT mode, rather than shift. Also check all pairs
testHighLevelEncodeString("A. : , \r\n",
// 'A' M/L P/L ". " ": " ", " "\r\n"
"...X. XXX.X XXXX. ...XX ..X.X ..X.. ...X.");
// Latch to DIGIT rather than shift to PUNCT
testHighLevelEncodeString("A. 1234",
// 'A' D/L '.' ' ' '1' '2' '3' '4'
"...X. XXXX. XX.X ...X ..XX .X.. .X.X .X X.");
// Don't bother leaving Binary Shift.
testHighLevelEncodeString("A\200. \200",
// 'A' B/S =2 \200 "." " " \200
"...X. XXXXX ..X.. X....... ..X.XXX. ..X..... X.......");
}
@Test(expected = IllegalArgumentException.class)
public void testUserSpecifiedLayers() {
doTestUserSpecifiedLayers(33);
}
@Test(expected = IllegalArgumentException.class)
public void testUserSpecifiedLayers2() {
doTestUserSpecifiedLayers(-1);
}
private void doTestUserSpecifiedLayers(int userSpecifiedLayers) {
String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
AztecCode aztec = Encoder.encode(alphabet, 25, -2);
assertEquals(2, aztec.getLayers());
assertTrue(aztec.isCompact());
aztec = Encoder.encode(alphabet, 25, 32);
assertEquals(32, aztec.getLayers());
assertFalse(aztec.isCompact());
Encoder.encode(alphabet, 25, userSpecifiedLayers);
}
@Test(expected = IllegalArgumentException.class)
public void testBorderCompact4CaseFailed() {
// Compact(4) con hold 608 bits of information, but at most 504 can be data. Rest must
// be error correction
String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
// encodes as 26 * 5 * 4 = 520 bits of data
String alphabet4 = alphabet + alphabet + alphabet + alphabet;
Encoder.encode(alphabet4, 0, -4);
}
@Test
public void testBorderCompact4Case() {
// Compact(4) con hold 608 bits of information, but at most 504 can be data. Rest must
// be error correction
String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
// encodes as 26 * 5 * 4 = 520 bits of data
String alphabet4 = alphabet + alphabet + alphabet + alphabet;
// If we just try to encode it normally, it will go to a non-compact 4 layer
AztecCode aztecCode = Encoder.encode(alphabet4, 0, Encoder.DEFAULT_AZTEC_LAYERS);
assertFalse(aztecCode.isCompact());
assertEquals(4, aztecCode.getLayers());
// But shortening the string to 100 bytes (500 bits of data), compact works fine, even if we
// include more error checking.
aztecCode = Encoder.encode(alphabet4.substring(0, 100), 10, Encoder.DEFAULT_AZTEC_LAYERS);
assertTrue(aztecCode.isCompact());
assertEquals(4, aztecCode.getLayers());
}
// Helper routines
private static void testEncode(String data, boolean compact, int layers, String expected) {
AztecCode aztec = Encoder.encode(data, 33, Encoder.DEFAULT_AZTEC_LAYERS);
assertEquals("Unexpected symbol format (compact)", compact, aztec.isCompact());
assertEquals("Unexpected nr. of layers", layers, aztec.getLayers());
BitMatrix matrix = aztec.getMatrix();
assertEquals("encode() failed", expected, matrix.toString());
}
private static void testEncodeDecode(String data, boolean compact, int layers) throws Exception {
AztecCode aztec = Encoder.encode(data, 25, Encoder.DEFAULT_AZTEC_LAYERS);
assertEquals("Unexpected symbol format (compact)", compact, aztec.isCompact());
assertEquals("Unexpected nr. of layers", layers, aztec.getLayers());
BitMatrix matrix = aztec.getMatrix();
AztecDetectorResult r =
new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers(), 0);
DecoderResult res = new Decoder().decode(r);
assertEquals(data, res.getText());
// Check error correction by introducing a few minor errors
Random random = getPseudoRandom();
matrix.flip(random.nextInt(matrix.getWidth()), random.nextInt(2));
matrix.flip(random.nextInt(matrix.getWidth()), matrix.getHeight() - 2 + random.nextInt(2));
matrix.flip(random.nextInt(2), random.nextInt(matrix.getHeight()));
matrix.flip(matrix.getWidth() - 2 + random.nextInt(2), random.nextInt(matrix.getHeight()));
r = new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers(), 0);
res = new Decoder().decode(r);
assertEquals(data, res.getText());
}
private static void testWriter(String data,
Charset charset,
int eccPercent,
boolean compact,
int layers) throws FormatException {
// Perform an encode-decode round-trip because it can be lossy.
Map<EncodeHintType,Object> hints = new EnumMap<>(EncodeHintType.class);
if (null != charset) {
hints.put(EncodeHintType.CHARACTER_SET, charset.name());
}
hints.put(EncodeHintType.ERROR_CORRECTION, eccPercent);
AztecWriter writer = new AztecWriter();
BitMatrix matrix = writer.encode(data, BarcodeFormat.AZTEC, 0, 0, hints);
AztecCode aztec = Encoder.encode(data, eccPercent,
Encoder.DEFAULT_AZTEC_LAYERS, charset);
assertEquals("Unexpected symbol format (compact)", compact, aztec.isCompact());
assertEquals("Unexpected nr. of layers", layers, aztec.getLayers());
BitMatrix matrix2 = aztec.getMatrix();
assertEquals(matrix, matrix2);
AztecDetectorResult r =
new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers(), 0);
DecoderResult res = new Decoder().decode(r);
assertEquals(data, res.getText());
// Check error correction by introducing up to eccPercent/2 errors
int ecWords = aztec.getCodeWords() * eccPercent / 100 / 2;
Random random = getPseudoRandom();
for (int i = 0; i < ecWords; i++) {
// don't touch the core
int x = random.nextBoolean() ?
random.nextInt(aztec.getLayers() * 2)
: matrix.getWidth() - 1 - random.nextInt(aztec.getLayers() * 2);
int y = random.nextBoolean() ?
random.nextInt(aztec.getLayers() * 2)
: matrix.getHeight() - 1 - random.nextInt(aztec.getLayers() * 2);
matrix.flip(x, y);
}
r = new AztecDetectorResult(matrix, NO_POINTS, aztec.isCompact(), aztec.getCodeWords(), aztec.getLayers(), 0);
res = new Decoder().decode(r);
assertEquals(data, res.getText());
}
private static Random getPseudoRandom() {
return new Random(0xDEADBEEF);
}
private static void testModeMessage(boolean compact, int layers, int words, String expected) {
BitArray in = Encoder.generateModeMessage(compact, layers, words);
assertEquals("generateModeMessage() failed", stripSpace(expected), stripSpace(in.toString()));
}
private static void testStuffBits(int wordSize, String bits, String expected) {
BitArray in = toBitArray(bits);
BitArray stuffed = Encoder.stuffBits(in, wordSize);
assertEquals("stuffBits() failed for input string: " + bits,
stripSpace(expected), stripSpace(stuffed.toString()));
}
public static BitArray toBitArray(CharSequence bits) {
BitArray in = new BitArray();
char[] str = DOTX.matcher(bits).replaceAll("").toCharArray();
for (char aStr : str) {
in.appendBit(aStr == 'X');
}
return in;
}
public static boolean[] toBooleanArray(BitArray bitArray) {
boolean[] result = new boolean[bitArray.getSize()];
for (int i = 0; i < result.length; i++) {
result[i] = bitArray.get(i);
}
return result;
}
private static void testHighLevelEncodeString(String s, String expectedBits) throws FormatException {
BitArray bits = new HighLevelEncoder(s.getBytes(StandardCharsets.ISO_8859_1)).encode();
String receivedBits = stripSpace(bits.toString());
assertEquals("highLevelEncode() failed for input string: " + s, stripSpace(expectedBits), receivedBits);
assertEquals(s, Decoder.highLevelDecode(toBooleanArray(bits)));
}
private static void testHighLevelEncodeString(String s, int expectedReceivedBits) throws FormatException {
BitArray bits = new HighLevelEncoder(s.getBytes(StandardCharsets.ISO_8859_1)).encode();
int receivedBitCount = stripSpace(bits.toString()).length();
assertEquals("highLevelEncode() failed for input string: " + s,
expectedReceivedBits, receivedBitCount);
assertEquals(s, Decoder.highLevelDecode(toBooleanArray(bits)));
}
public static String stripSpace(String s) {
return SPACES.matcher(s).replaceAll("");
}
}