| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * 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 libcore.java.lang; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Modifier; |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.ReadOnlyBufferException; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetDecoder; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.CoderResult; |
| import java.nio.charset.CodingErrorAction; |
| import java.util.Arrays; |
| import java.util.Locale; |
| import junit.framework.TestCase; |
| |
| public class StringTest extends TestCase { |
| public void testIsEmpty() { |
| assertTrue("".isEmpty()); |
| assertFalse("x".isEmpty()); |
| } |
| |
| // The evil decoder keeps hold of the CharBuffer it wrote to. |
| private static final class EvilCharsetDecoder extends CharsetDecoder { |
| private static char[] chars; |
| public EvilCharsetDecoder(Charset cs) { |
| super(cs, 1.0f, 1.0f); |
| } |
| protected CoderResult decodeLoop(ByteBuffer in, CharBuffer out) { |
| chars = out.array(); |
| int inLength = in.remaining(); |
| for (int i = 0; i < inLength; ++i) { |
| in.put((byte) 'X'); |
| out.put('Y'); |
| } |
| return CoderResult.UNDERFLOW; |
| } |
| public static void corrupt() { |
| for (int i = 0; i < chars.length; ++i) { |
| chars[i] = '$'; |
| } |
| } |
| } |
| |
| // The evil encoder tries to write to the CharBuffer it was given to |
| // read from. |
| private static final class EvilCharsetEncoder extends CharsetEncoder { |
| public EvilCharsetEncoder(Charset cs) { |
| super(cs, 1.0f, 1.0f); |
| } |
| protected CoderResult encodeLoop(CharBuffer in, ByteBuffer out) { |
| int inLength = in.remaining(); |
| for (int i = 0; i < inLength; ++i) { |
| in.put('x'); |
| out.put((byte) 'y'); |
| } |
| return CoderResult.UNDERFLOW; |
| } |
| } |
| |
| private static final Charset EVIL_CHARSET = new Charset("evil", null) { |
| public boolean contains(Charset charset) { return false; } |
| public CharsetEncoder newEncoder() { return new EvilCharsetEncoder(this); } |
| public CharsetDecoder newDecoder() { return new EvilCharsetDecoder(this); } |
| }; |
| |
| public void testGetBytes_MaliciousCharset() { |
| try { |
| String s = "hi"; |
| // Check that our encoder can't write to the input CharBuffer |
| // it was given. |
| s.getBytes(EVIL_CHARSET); |
| fail(); // We shouldn't have got here! |
| } catch (ReadOnlyBufferException expected) { |
| // We caught you trying to be naughty! |
| } |
| } |
| |
| public void testString_BII() throws Exception { |
| byte[] bytes = "xa\u0666bx".getBytes("UTF-8"); |
| assertEquals("a\u0666b", new String(bytes, 1, bytes.length - 2)); |
| } |
| |
| public void testString_BIIString() throws Exception { |
| byte[] bytes = "xa\u0666bx".getBytes("UTF-8"); |
| assertEquals("a\u0666b", new String(bytes, 1, bytes.length - 2, "UTF-8")); |
| } |
| |
| public void testString_BIICharset() throws Exception { |
| byte[] bytes = "xa\u0666bx".getBytes("UTF-8"); |
| assertEquals("a\u0666b", new String(bytes, 1, bytes.length - 2, Charset.forName("UTF-8"))); |
| } |
| |
| public void testString_BCharset() throws Exception { |
| byte[] bytes = "a\u0666b".getBytes("UTF-8"); |
| assertEquals("a\u0666b", new String(bytes, Charset.forName("UTF-8"))); |
| } |
| |
| public void testStringFromCharset_MaliciousCharset() { |
| Charset cs = EVIL_CHARSET; |
| byte[] bytes = new byte[] {(byte) 'h', (byte) 'i'}; |
| final String result = new String(bytes, cs); |
| assertEquals("YY", result); // (Our decoder always outputs 'Y's.) |
| // Check that even if the decoder messes with the output CharBuffer |
| // after we've created a string from it, it doesn't affect the string. |
| EvilCharsetDecoder.corrupt(); |
| assertEquals("YY", result); |
| } |
| |
| public void test_getBytes_bad() throws Exception { |
| // Check that we use '?' as the replacement byte for invalid characters. |
| assertEquals("[97, 63, 98]", Arrays.toString("a\u0666b".getBytes("US-ASCII"))); |
| assertEquals("[97, 63, 98]", Arrays.toString("a\u0666b".getBytes(Charset.forName("US-ASCII")))); |
| } |
| |
| public void test_getBytes_UTF_8() { |
| // We have a fast path implementation of String.getBytes for UTF-8. |
| Charset cs = Charset.forName("UTF-8"); |
| |
| // Test the empty string. |
| assertEquals("[]", Arrays.toString("".getBytes(cs))); |
| |
| // Test one-byte characters. |
| assertEquals("[0]", Arrays.toString("\u0000".getBytes(cs))); |
| assertEquals("[127]", Arrays.toString("\u007f".getBytes(cs))); |
| assertEquals("[104, 105]", Arrays.toString("hi".getBytes(cs))); |
| |
| // Test two-byte characters. |
| assertEquals("[-62, -128]", Arrays.toString("\u0080".getBytes(cs))); |
| assertEquals("[-39, -90]", Arrays.toString("\u0666".getBytes(cs))); |
| assertEquals("[-33, -65]", Arrays.toString("\u07ff".getBytes(cs))); |
| assertEquals("[104, -39, -90, 105]", Arrays.toString("h\u0666i".getBytes(cs))); |
| |
| // Test three-byte characters. |
| assertEquals("[-32, -96, -128]", Arrays.toString("\u0800".getBytes(cs))); |
| assertEquals("[-31, -120, -76]", Arrays.toString("\u1234".getBytes(cs))); |
| assertEquals("[-17, -65, -65]", Arrays.toString("\uffff".getBytes(cs))); |
| assertEquals("[104, -31, -120, -76, 105]", Arrays.toString("h\u1234i".getBytes(cs))); |
| |
| // Test supplementary characters. |
| // Minimum supplementary character: U+10000 |
| assertEquals("[-16, -112, -128, -128]", Arrays.toString("\ud800\udc00".getBytes(cs))); |
| // Random supplementary character: U+10381 Ugaritic letter beta |
| assertEquals("[-16, -112, -114, -127]", Arrays.toString("\ud800\udf81".getBytes(cs))); |
| // Maximum supplementary character: U+10FFFF |
| assertEquals("[-12, -113, -65, -65]", Arrays.toString("\udbff\udfff".getBytes(cs))); |
| // A high surrogate at end of string is an error replaced with '?'. |
| assertEquals("[104, 63]", Arrays.toString("h\ud800".getBytes(cs))); |
| // A high surrogate not followed by a low surrogate is an error replaced with '?'. |
| assertEquals("[104, 63, 105]", Arrays.toString("h\ud800i".getBytes(cs))); |
| } |
| |
| public void test_new_String_bad() throws Exception { |
| // Check that we use U+FFFD as the replacement string for invalid bytes. |
| assertEquals("a\ufffdb", new String(new byte[] { 97, -2, 98 }, "US-ASCII")); |
| assertEquals("a\ufffdb", new String(new byte[] { 97, -2, 98 }, Charset.forName("US-ASCII"))); |
| } |
| |
| /** |
| |
| * Test that strings interned manually and then later loaded as literals |
| * maintain reference equality. http://b/3098960 |
| */ |
| public void testInternBeforeLiteralIsLoaded() throws Exception{ |
| String programmatic = Arrays.asList("5058", "9962", "1563", "5744").toString().intern(); |
| String literal = (String) Class.forName("libcore.java.lang.StringTest$HasLiteral") |
| .getDeclaredField("literal").get(null); |
| assertEquals(System.identityHashCode(programmatic), System.identityHashCode(literal)); |
| assertSame(programmatic, literal); |
| } |
| |
| static class HasLiteral { |
| static String literal = "[5058, 9962, 1563, 5744]"; |
| } |
| |
| private static final String COMBINING_DOT_ABOVE = "\u0307"; |
| private static final String LATIN_CAPITAL_I = "I"; |
| private static final String LATIN_CAPITAL_I_WITH_DOT_ABOVE = "\u0130"; |
| private static final String LATIN_SMALL_I = "i"; |
| private static final String LATIN_SMALL_DOTLESS_I = "\u0131"; |
| |
| private static final String[] LATIN_I_VARIANTS = { |
| LATIN_SMALL_I, |
| LATIN_SMALL_DOTLESS_I, |
| LATIN_CAPITAL_I, |
| LATIN_CAPITAL_I_WITH_DOT_ABOVE, |
| }; |
| |
| public void testCaseMapping_tr_TR() { |
| Locale tr_TR = new Locale("tr", "TR"); |
| assertEquals(LATIN_SMALL_I, LATIN_SMALL_I.toLowerCase(tr_TR)); |
| assertEquals(LATIN_SMALL_I, LATIN_CAPITAL_I_WITH_DOT_ABOVE.toLowerCase(tr_TR)); |
| assertEquals(LATIN_SMALL_DOTLESS_I, LATIN_SMALL_DOTLESS_I.toLowerCase(tr_TR)); |
| |
| assertEquals(LATIN_CAPITAL_I, LATIN_CAPITAL_I.toUpperCase(tr_TR)); |
| assertEquals(LATIN_CAPITAL_I_WITH_DOT_ABOVE, LATIN_CAPITAL_I_WITH_DOT_ABOVE.toUpperCase(tr_TR)); |
| assertEquals(LATIN_CAPITAL_I_WITH_DOT_ABOVE, LATIN_SMALL_I.toUpperCase(tr_TR)); |
| |
| assertEquals(LATIN_CAPITAL_I, LATIN_SMALL_DOTLESS_I.toUpperCase(tr_TR)); |
| assertEquals(LATIN_SMALL_DOTLESS_I, LATIN_CAPITAL_I.toLowerCase(tr_TR)); |
| } |
| |
| public void testCaseMapping_en_US() { |
| Locale en_US = new Locale("en", "US"); |
| assertEquals(LATIN_CAPITAL_I, LATIN_SMALL_I.toUpperCase(en_US)); |
| assertEquals(LATIN_CAPITAL_I, LATIN_CAPITAL_I.toUpperCase(en_US)); |
| assertEquals(LATIN_CAPITAL_I_WITH_DOT_ABOVE, LATIN_CAPITAL_I_WITH_DOT_ABOVE.toUpperCase(en_US)); |
| |
| assertEquals(LATIN_SMALL_I, LATIN_SMALL_I.toLowerCase(en_US)); |
| assertEquals(LATIN_SMALL_I, LATIN_CAPITAL_I.toLowerCase(en_US)); |
| assertEquals(LATIN_SMALL_DOTLESS_I, LATIN_SMALL_DOTLESS_I.toLowerCase(en_US)); |
| |
| assertEquals(LATIN_CAPITAL_I, LATIN_SMALL_DOTLESS_I.toUpperCase(en_US)); |
| // http://b/3325799: the RI fails this because it's using an obsolete version of the Unicode rules. |
| // Android correctly preserves canonical equivalence. (See the separate test for tr_TR.) |
| assertEquals(LATIN_SMALL_I + COMBINING_DOT_ABOVE, LATIN_CAPITAL_I_WITH_DOT_ABOVE.toLowerCase(en_US)); |
| } |
| |
| public void testCaseMapping_el() { |
| Locale el_GR = new Locale("el", "GR"); |
| assertEquals("ΟΔΟΣ ΟΔΟΣ ΣΟ ΣΟ OΣ ΟΣ Σ ΕΞ", "ΟΔΌΣ Οδός Σο ΣΟ oΣ ΟΣ σ ἕξ".toUpperCase(el_GR)); |
| assertEquals("ΟΔΟΣ ΟΔΟΣ ΣΟ ΣΟ OΣ ΟΣ Σ ΕΞ", "ΟΔΌΣ Οδός Σο ΣΟ oΣ ΟΣ σ ἕξ".toUpperCase(el_GR)); |
| assertEquals("ΟΔΟΣ ΟΔΟΣ ΣΟ ΣΟ OΣ ΟΣ Σ ΕΞ", "ΟΔΌΣ Οδός Σο ΣΟ oΣ ΟΣ σ ἕξ".toUpperCase(el_GR)); |
| |
| Locale en_US = new Locale("en", "US"); |
| assertEquals("ΟΔΌΣ ΟΔΌΣ ΣΟ ΣΟ OΣ ΟΣ Σ ἝΞ", "ΟΔΌΣ Οδός Σο ΣΟ oΣ ΟΣ σ ἕξ".toUpperCase(en_US)); |
| } |
| |
| public void testEqualsIgnoreCase_tr_TR() { |
| testEqualsIgnoreCase(new Locale("tr", "TR")); |
| } |
| |
| public void testEqualsIgnoreCase_en_US() { |
| testEqualsIgnoreCase(new Locale("en", "US")); |
| } |
| |
| /** |
| * String.equalsIgnoreCase should not depend on the locale. |
| */ |
| private void testEqualsIgnoreCase(Locale locale) { |
| Locale defaultLocale = Locale.getDefault(); |
| Locale.setDefault(locale); |
| try { |
| for (String a : LATIN_I_VARIANTS) { |
| for (String b : LATIN_I_VARIANTS) { |
| if (!a.equalsIgnoreCase(b)) { |
| fail("Expected " + a + " to equal " + b + " in " + locale); |
| } |
| } |
| } |
| } finally { |
| Locale.setDefault(defaultLocale); |
| } |
| } |
| |
| public void testRegionMatches_ignoreCase_en_US() { |
| testRegionMatches_ignoreCase(new Locale("en", "US")); |
| } |
| |
| public void testRegionMatches_ignoreCase_tr_TR() { |
| testRegionMatches_ignoreCase(new Locale("tr", "TR")); |
| } |
| |
| private void testRegionMatches_ignoreCase(Locale locale) { |
| Locale defaultLocale = Locale.getDefault(); |
| Locale.setDefault(locale); |
| try { |
| for (String a : LATIN_I_VARIANTS) { |
| for (String b : LATIN_I_VARIANTS) { |
| if (!a.regionMatches(true, 0, b, 0, b.length())) { |
| fail("Expected " + a + " to equal " + b + " in " + locale); |
| } |
| } |
| } |
| } finally { |
| Locale.setDefault(defaultLocale); |
| } |
| } |
| |
| // http://code.google.com/p/android/issues/detail?id=15266 |
| public void test_replaceAll() throws Exception { |
| assertEquals("project_Id", "projectId".replaceAll("(?!^)(\\p{Upper})(?!$)", "_$1")); |
| } |
| |
| // https://code.google.com/p/android/issues/detail?id=23831 |
| public void test_23831() throws Exception { |
| byte[] bytes = { (byte) 0xf5, (byte) 0xa9, (byte) 0xea, (byte) 0x21 }; |
| String expected = "\ufffd\ufffd\u0021"; |
| |
| // Since we use icu4c for CharsetDecoder... |
| CharsetDecoder decoder = Charset.forName("UTF-8").newDecoder(); |
| decoder.onMalformedInput(CodingErrorAction.REPLACE); |
| assertEquals(expected, decoder.decode(ByteBuffer.wrap(bytes)).toString()); |
| |
| // Our fast-path code in String should behave the same... |
| assertEquals(expected, new String(bytes, "UTF-8")); |
| } |
| |
| // https://code.google.com/p/android/issues/detail?id=55129 |
| public void test_55129() throws Exception { |
| assertEquals("-h-e-l-l-o- -w-o-r-l-d-", "hello world".replace("", "-")); |
| assertEquals("-w-o-r-l-d-", "hello world".substring(6).replace("", "-")); |
| assertEquals("-*-w-*-o-*-r-*-l-*-d-*-", "hello world".substring(6).replace("", "-*-")); |
| } |
| |
| public void test_String_getBytes() throws Exception { |
| // http://b/11571917 |
| assertEquals("[-126, -96]", Arrays.toString("あ".getBytes("Shift_JIS"))); |
| assertEquals("[-126, -87]", Arrays.toString("か".getBytes("Shift_JIS"))); |
| assertEquals("[-105, 67]", Arrays.toString("佑".getBytes("Shift_JIS"))); |
| assertEquals("[36]", Arrays.toString("$".getBytes("Shift_JIS"))); |
| assertEquals("[-29, -127, -117]", Arrays.toString("か".getBytes("UTF-8"))); |
| |
| // http://b/11639117 |
| assertEquals("[-79, -72, -70, -48]", Arrays.toString("구분".getBytes("EUC-KR"))); |
| |
| |
| // https://code.google.com/p/android/issues/detail?id=63188 |
| assertEquals("[-77, -10, -64, -76, -63, -53]", Arrays.toString("出来了".getBytes("gbk"))); |
| assertEquals("[-77, -10, -64, -76]", Arrays.toString("出来".getBytes("gbk"))); |
| assertEquals("[-77, -10]", Arrays.toString("出".getBytes("gbk"))); |
| } |
| |
| public void test_compareTo() throws Exception { |
| // For strings where a character differs, the result is |
| // the difference between the characters. |
| assertEquals(-1, "a".compareTo("b")); |
| assertEquals(-2, "a".compareTo("c")); |
| assertEquals(1, "b".compareTo("a")); |
| assertEquals(2, "c".compareTo("a")); |
| |
| // For strings where the characters match up to the length of the shorter, |
| // the result is the difference between the strings' lengths. |
| assertEquals(0, "a".compareTo("a")); |
| assertEquals(-1, "a".compareTo("aa")); |
| assertEquals(-1, "a".compareTo("az")); |
| assertEquals(-2, "a".compareTo("aaa")); |
| assertEquals(-2, "a".compareTo("azz")); |
| assertEquals(-3, "a".compareTo("aaaa")); |
| assertEquals(-3, "a".compareTo("azzz")); |
| assertEquals(0, "a".compareTo("a")); |
| assertEquals(1, "aa".compareTo("a")); |
| assertEquals(1, "az".compareTo("a")); |
| assertEquals(2, "aaa".compareTo("a")); |
| assertEquals(2, "azz".compareTo("a")); |
| assertEquals(3, "aaaa".compareTo("a")); |
| assertEquals(3, "azzz".compareTo("a")); |
| } |
| |
| public void test_compareToIgnoreCase() throws Exception { |
| // For strings where a character differs, the result is |
| // the difference between the characters. |
| assertEquals(-1, "a".compareToIgnoreCase("b")); |
| assertEquals(-1, "a".compareToIgnoreCase("B")); |
| assertEquals(-2, "a".compareToIgnoreCase("c")); |
| assertEquals(-2, "a".compareToIgnoreCase("C")); |
| assertEquals(1, "b".compareToIgnoreCase("a")); |
| assertEquals(1, "B".compareToIgnoreCase("a")); |
| assertEquals(2, "c".compareToIgnoreCase("a")); |
| assertEquals(2, "C".compareToIgnoreCase("a")); |
| |
| // For strings where the characters match up to the length of the shorter, |
| // the result is the difference between the strings' lengths. |
| assertEquals(0, "a".compareToIgnoreCase("a")); |
| assertEquals(0, "a".compareToIgnoreCase("A")); |
| assertEquals(0, "A".compareToIgnoreCase("a")); |
| assertEquals(0, "A".compareToIgnoreCase("A")); |
| assertEquals(-1, "a".compareToIgnoreCase("aa")); |
| assertEquals(-1, "a".compareToIgnoreCase("aA")); |
| assertEquals(-1, "a".compareToIgnoreCase("Aa")); |
| assertEquals(-1, "a".compareToIgnoreCase("az")); |
| assertEquals(-1, "a".compareToIgnoreCase("aZ")); |
| assertEquals(-2, "a".compareToIgnoreCase("aaa")); |
| assertEquals(-2, "a".compareToIgnoreCase("AAA")); |
| assertEquals(-2, "a".compareToIgnoreCase("azz")); |
| assertEquals(-2, "a".compareToIgnoreCase("AZZ")); |
| assertEquals(-3, "a".compareToIgnoreCase("aaaa")); |
| assertEquals(-3, "a".compareToIgnoreCase("AAAA")); |
| assertEquals(-3, "a".compareToIgnoreCase("azzz")); |
| assertEquals(-3, "a".compareToIgnoreCase("AZZZ")); |
| assertEquals(1, "aa".compareToIgnoreCase("a")); |
| assertEquals(1, "aA".compareToIgnoreCase("a")); |
| assertEquals(1, "Aa".compareToIgnoreCase("a")); |
| assertEquals(1, "az".compareToIgnoreCase("a")); |
| assertEquals(2, "aaa".compareToIgnoreCase("a")); |
| assertEquals(2, "azz".compareToIgnoreCase("a")); |
| assertEquals(3, "aaaa".compareToIgnoreCase("a")); |
| assertEquals(3, "azzz".compareToIgnoreCase("a")); |
| } |
| |
| // http://b/25943996 |
| public void testSplit_trailingSeparators() { |
| String[] splits = "test\0message\0\0\0\0\0\0".split("\0", -1); |
| assertEquals("test", splits[0]); |
| assertEquals("message", splits[1]); |
| assertEquals("", splits[2]); |
| assertEquals("", splits[3]); |
| assertEquals("", splits[4]); |
| assertEquals("", splits[5]); |
| assertEquals("", splits[6]); |
| assertEquals("", splits[7]); |
| } |
| |
| // http://b/26126818 |
| public void testCodePointCount() { |
| String hello = "Hello, fools"; |
| |
| assertEquals(5, hello.codePointCount(0, 5)); |
| assertEquals(7, hello.codePointCount(5, 12)); |
| assertEquals(2, hello.codePointCount(10, 12)); |
| } |
| |
| // http://b/26444984 |
| public void testGetCharsOverflow() { |
| int srcBegin = Integer.MAX_VALUE; //2147483647 |
| int srcEnd = srcBegin + 10; //-2147483639 |
| try { |
| // The output array size must be larger than |srcEnd - srcBegin|. |
| "yes".getChars(srcBegin, srcEnd, new char[256], 0); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| } |
