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package com.dampcake.bencode;
import org.junit.Before;
import org.junit.Test;
import org.junit.function.ThrowingRunnable;
import java.io.EOFException;
import java.io.InvalidObjectException;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.concurrent.ConcurrentSkipListMap;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.assertTrue;
/**
* Unit tests for Bencode.
*/
@SuppressWarnings("unchecked")
public class BencodeTest {
private Bencode instance;
@Before
public void setUp() {
instance = new Bencode();
}
@Test
public void testConstructorNullCharset() {
NullPointerException exception = assertThrows(NullPointerException.class, () -> new Bencode(null));
assertEquals("charset cannot be null", exception.getMessage());
}
@Test
public void testConstructorWithCharset() {
Bencode bencode = new Bencode(Charset.forName("US-ASCII"));
assertEquals(bencode.getCharset(), Charset.forName("US-ASCII"));
}
@Test
public void testTypeString() {
assertSame(Type.STRING, instance.type("7".getBytes()));
}
@Test
public void testTypeNumber() {
assertSame(Type.NUMBER, instance.type("i1".getBytes()));
}
@Test
public void testTypeList() {
assertSame(Type.LIST, instance.type("l123".getBytes()));
}
@Test
public void testTypeDictionary() {
assertSame(Type.DICTIONARY, instance.type("dtesting".getBytes()));
}
@Test
public void testTypeUnknown() {
assertSame(Type.UNKNOWN, instance.type("unknown".getBytes()));
}
@Test
public void testTypeEmpty() {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.type(new byte[0]));
assertThat(exception.getCause(), instanceOf(EOFException.class));
}
@Test
public void testTypeNullBytes() {
NullPointerException exception = assertThrows(NullPointerException.class, () -> instance.type(null));
assertEquals("bytes cannot be null", exception.getMessage());
}
@Test
public void testDecodeNullBytes() {
NullPointerException exception = assertThrows(NullPointerException.class, () -> instance.decode(null, Type.STRING));
assertEquals("bytes cannot be null", exception.getMessage());
}
@Test
public void testDecodeNullType() {
NullPointerException exception = assertThrows(NullPointerException.class, () -> instance.decode("12:Hello World!".getBytes(), null));
assertEquals("type cannot be null", exception.getMessage());
}
@Test
public void testDecodeUnknownType() {
IllegalArgumentException exception = assertThrows(IllegalArgumentException.class, () -> instance.decode("12:Hello World!".getBytes(), Type.UNKNOWN));
assertEquals("type cannot be UNKNOWN", exception.getMessage());
}
@Test
public void testDecodeString() {
String decoded = instance.decode("12:Hello World!".getBytes(), Type.STRING);
assertEquals("Hello World!", decoded);
}
@Test
public void testDecodeStringMultiByteCodePoints() {
String decoded = instance.decode("7:Garçon".getBytes(), Type.STRING);
assertEquals("Garçon", decoded);
}
@Test
public void testDecodeEmptyString() {
String decoded = instance.decode("0:123".getBytes(), Type.STRING);
assertEquals("", decoded);
}
@Test
public void testDecodeStringNaN() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("1c3:Testing".getBytes(), Type.STRING));
assertThat(exception.getCause(), instanceOf(InvalidObjectException.class));
}
@Test
public void testDecodeStringEOF() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("123456".getBytes(), Type.STRING));
assertThat(exception.getCause(), instanceOf(EOFException.class));
}
@Test
public void testDecodeStringEmpty() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("".getBytes(), Type.STRING));
assertThat(exception.getCause(), instanceOf(EOFException.class));
}
@Test
public void testDecodeNumber() throws Exception {
long decoded = instance.decode("i123456e123".getBytes(), Type.NUMBER);
assertEquals(123456, decoded);
}
@Test
public void testDecodeNumberNaN() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("i123cbve1".getBytes(), Type.NUMBER));
assertThat(exception.getCause(), instanceOf(NumberFormatException.class));
}
@Test
public void testDecodeNumberEOF() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("i123".getBytes(), Type.NUMBER));
assertThat(exception.getCause(), instanceOf(EOFException.class));
}
@Test
public void testDecodeNumberEmpty() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("".getBytes(), Type.NUMBER));
assertThat(exception.getCause(), instanceOf(EOFException.class));
}
@Test
public void testDecodeList() throws Exception {
List<Object> decoded = instance.decode("l5:Hello6:World!li123ei456eeetesting".getBytes(), Type.LIST);
assertEquals(3, decoded.size());
assertEquals("Hello", decoded.get(0));
assertEquals("World!", decoded.get(1));
List<Object> list = (List<Object>) decoded.get(2);
assertEquals(123L, list.get(0));
assertEquals(456L, list.get(1));
}
@Test
public void testDecodeListByteArray() throws Exception {
instance = new Bencode(true);
List<Object> decoded = instance.decode("l5:Hello6:World!li123ei456eeetesting".getBytes(), Type.LIST);
assertEquals(3, decoded.size());
assertThat(decoded.get(0), instanceOf(ByteBuffer.class));
assertEquals("Hello", new String(((ByteBuffer) decoded.get(0)).array()));
assertThat(decoded.get(1), instanceOf(ByteBuffer.class));
assertEquals("World!", new String(((ByteBuffer) decoded.get(1)).array()));
List<Object> list = (List<Object>) decoded.get(2);
assertEquals(123L, list.get(0));
assertEquals(456L, list.get(1));
}
@Test
public void testDecodeListEmpty() throws Exception {
List<Object> decoded = instance.decode("le123".getBytes(), Type.LIST);
assertTrue(decoded.isEmpty());
}
@Test
public void testDecodeListInvalidItem() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("l2:Worlde".getBytes(), Type.LIST));
assertThat(exception.getCause(), instanceOf(InvalidObjectException.class));
}
@Test
public void testDecodeListEOF() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("l5:Hello".getBytes(), Type.LIST));
assertThat(exception.getCause(), instanceOf(EOFException.class));
}
@Test
public void testDecodeDictionary() throws Exception {
Map<String, Object> decoded = instance.decode("d4:dictd3:1234:test3:4565:thinge4:listl11:list-item-111:list-item-2e6:numberi123456e6:string5:valuee".getBytes(), Type.DICTIONARY);
assertEquals(4, decoded.size());
assertEquals("value", decoded.get("string"));
assertEquals(123456L, decoded.get("number"));
List<Object> list = (List<Object>) decoded.get("list");
assertEquals(2, list.size());
assertEquals("list-item-1", list.get(0));
assertEquals("list-item-2", list.get(1));
Map<String, Object> map = (Map<String, Object>) decoded.get("dict");
assertEquals(2, map.size());
assertEquals("test", map.get("123"));
assertEquals("thing", map.get("456"));
}
@Test
public void testDecodeDebianTracker() throws Exception {
Map<String, Object> decoded = instance.decode("d8:intervali900e5:peersld2:ip12:146.71.73.514:porti63853eeee".getBytes(), Type.DICTIONARY);
assertEquals(2, decoded.size());
assertEquals(900L, decoded.get("interval"));
List<Object> list = (List<Object>) decoded.get("peers");
assertEquals(1, list.size());
Map<String, Object> map = (Map<String, Object>) list.get(0);
assertEquals("146.71.73.51", map.get("ip"));
assertEquals(63853L, map.get("port"));
}
@Test
public void testDecodeDictionaryByteArray() throws Exception {
instance = new Bencode(true);
Map<String, Object> decoded = instance.decode("d4:dictd3:1234:test3:4565:thinge4:listl11:list-item-111:list-item-2e6:numberi123456e6:string5:valuee".getBytes(), Type.DICTIONARY);
assertEquals(4, decoded.size());
assertThat(decoded.get("string"), instanceOf(ByteBuffer.class));
assertEquals("value", new String(((ByteBuffer) decoded.get("string")).array()));
assertEquals(123456L, decoded.get("number"));
List<Object> list = (List<Object>) decoded.get("list");
assertEquals(2, list.size());
assertThat(list.get(0), instanceOf(ByteBuffer.class));
assertEquals("list-item-1", new String(((ByteBuffer) list.get(0)).array()));
assertThat(list.get(1), instanceOf(ByteBuffer.class));
assertEquals("list-item-2", new String(((ByteBuffer) list.get(1)).array()));
Map<String, Object> map = (Map<String, Object>) decoded.get("dict");
assertEquals(2, map.size());
assertThat(map.get("123"), instanceOf(ByteBuffer.class));
assertEquals("test", new String(((ByteBuffer) map.get("123")).array()));
assertThat(map.get("456"), instanceOf(ByteBuffer.class));
assertEquals("thing", new String(((ByteBuffer) map.get("456")).array()));
}
@Test
public void testDecodeDictionaryEmpty() throws Exception {
Map<String, Object> decoded = instance.decode("de123test".getBytes(), Type.DICTIONARY);
assertTrue(decoded.isEmpty());
}
@Test
public void testDecodeDictionaryInvalidItem() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("d4:item5:value3:testing".getBytes(), Type.DICTIONARY));
assertThat(exception.getCause(), instanceOf(InvalidObjectException.class));
}
@Test
public void testDecodeDictionaryEOF() throws Exception {
BencodeException exception = assertThrows(BencodeException.class, () -> instance.decode("d4:item5:test".getBytes(), Type.DICTIONARY));
assertThat(exception.getCause(), instanceOf(EOFException.class));
}
@Test
public void testWriteString() throws Exception {
byte[] encoded = instance.encode("Hello World!");
assertEquals("12:Hello World!", new String(encoded, instance.getCharset()));
}
@Test
public void testWriteStringMultiByteCodePoints() throws Exception {
byte[] encoded = instance.encode("Garçon");
assertEquals("7:Garçon", new String(encoded, instance.getCharset()));
}
@Test
public void testWriteStringEmpty() throws Exception {
byte[] encoded = instance.encode("");
assertEquals("0:", new String(encoded, instance.getCharset()));
}
@Test
public void testWriteStringNull() throws Exception {
NullPointerException exception = assertThrows(NullPointerException.class, () -> instance.encode((String) null));
assertEquals("s cannot be null", exception.getMessage());
}
@Test
public void testWriteNumber() throws Exception {
byte[] encoded = instance.encode(123456);
assertEquals("i123456e", new String(encoded, instance.getCharset()));
}
@Test
public void testWriteNumberDecimal() throws Exception {
byte[] encoded = instance.encode(123.456);
assertEquals("i123e", new String(encoded, instance.getCharset()));
}
@Test
public void testWriteNumberNull() throws Exception {
NullPointerException exception = assertThrows(NullPointerException.class, () -> instance.encode((Number) null));
assertEquals("n cannot be null", exception.getMessage());
}
@Test
public void testWriteList() throws Exception {
byte[] encoded = instance.encode(new ArrayList<Object>() {{
add("Hello");
add("World!");
add(new ArrayList<Object>() {{
add(123);
add(456);
}});
}});
assertEquals("l5:Hello6:World!li123ei456eee", new String(encoded, instance.getCharset()));
}
@Test
public void testWriteListEmpty() throws Exception {
byte[] encoded = instance.encode(new ArrayList<Object>());
assertEquals("le", new String(encoded, instance.getCharset()));
}
@Test
public void testWriteListNullItem() throws Exception {
ThrowingRunnable runnable = () -> instance.encode(new ArrayList<Object>() {{
add("Hello");
add("World!");
add(new ArrayList<Object>() {{
add(null);
add(456);
}});
}});
BencodeException exception = assertThrows(BencodeException.class, runnable);
assertThat(exception.getCause(), instanceOf(NullPointerException.class));
}
@Test
public void testWriteListNull() throws Exception {
NullPointerException exception = assertThrows(NullPointerException.class, () -> instance.encode((List<?>) null));
assertEquals("l cannot be null", exception.getMessage());
}
@Test
public void testWriteDictionary() throws Exception {
byte[] encoded = instance.encode(new LinkedHashMap<Object, Object>() {{
put("string", "value");
put("number", 123456);
put("list", new ArrayList<Object>() {{
add("list-item-1");
add("list-item-2");
}});
put("dict", new ConcurrentSkipListMap<Integer, String>() {{
put(123, "test");
put(456, "thing");
}});
}});
assertEquals("d4:dictd3:1234:test3:4565:thinge4:listl11:list-item-111:list-item-2e6:numberi123456e6:string5:valuee",
new String(encoded, instance.getCharset()));
}
@Test
public void testWriteDictionaryEmpty() throws Exception {
byte[] encoded = instance.encode(new HashMap<Object, Object>());
assertEquals("de", new String(encoded, instance.getCharset()));
}
@Test
public void testWriteDictionaryKeyCastException() throws Exception {
ThrowingRunnable runnable = () -> instance.encode(new TreeMap<Object, Object>() {{
put("string", "value");
put(123, "number-key");
}});
assertThrows(ClassCastException.class, runnable);
}
@Test
public void testWriteDictionaryNull() throws Exception {
NullPointerException exception = assertThrows(NullPointerException.class, () -> instance.encode((Map<?, ?>) null));
assertEquals("m cannot be null", exception.getMessage());
}
}
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