| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| // @dart = 2.7 |
| |
| import "package:expect/expect.dart"; |
| |
| // Test that string escapes work correctly. |
| |
| testSingleCharacterEscapes() { |
| List/*<String>*/ examples = [ |
| "\b\f\n\r\t\v", |
| '\b\f\n\r\t\v', |
| """\b\f\n\r\t\v""", |
| '''\b\f\n\r\t\v''', |
| ]; |
| List values = [8, 12, 10, 13, 9, 11]; |
| for (String s in examples) { |
| Expect.equals(6, s.length); |
| for (int i = 0; i < 6; i++) { |
| Expect.equals(values[i], s.codeUnitAt(i)); |
| } |
| } |
| |
| // An escaped quote isn't part of a multiline end quote. |
| Expect.equals(r'"', """\""""); |
| Expect.equals(r"'", '''\''''); |
| Expect.equals(r'" "', """" \""""); |
| Expect.equals(r"' '", '''' \''''); |
| Expect.equals(r'"" ', """"" """); |
| Expect.equals(r"'' ", ''''' '''); |
| } |
| |
| testXEscapes() { |
| var allBytes = |
| "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f" |
| "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" |
| "\x20\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f" |
| "\x30\x31\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f" |
| "\x40\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f" |
| "\x50\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f" |
| "\x60\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6a\x6b\x6c\x6d\x6e\x6f" |
| "\x70\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x7b\x7c\x7d\x7e\x7f" |
| "\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f" |
| "\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f" |
| "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf" |
| "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf" |
| "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf" |
| "\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf" |
| "\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef" |
| "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"; |
| Expect.equals(256, allBytes.length); |
| for (int i = 0; i < 256; i++) { |
| Expect.equals(i, allBytes.codeUnitAt(i)); |
| } |
| } |
| |
| testUEscapes() { |
| List /*String*/ examples = [ |
| "\u0000\u0001\u0022\u0027\u005c\u007f\u0080\u00ff" |
| "\u0100\u1000\ud7ff\ue000\uffff", |
| '\u0000\u0001\u0022\u0027\u005c\u007f\u0080\u00ff' |
| '\u0100\u1000\ud7ff\ue000\uffff', |
| """\u0000\u0001\u0022\u0027\u005c\u007f\u0080\u00ff""" |
| """\u0100\u1000\ud7ff\ue000\uffff""", |
| '''\u0000\u0001\u0022\u0027\u005c\u007f\u0080\u00ff''' |
| '''\u0100\u1000\ud7ff\ue000\uffff''' |
| ]; |
| List/*<int>*/ values = [ |
| 0, |
| 1, |
| 0x22, |
| 0x27, |
| 0x5c, |
| 0x7f, |
| 0x80, |
| 0xff, |
| 0x100, |
| 0x1000, |
| 0xd7ff, |
| 0xe000, |
| 0xffff |
| ]; |
| for (String s in examples) { |
| Expect.equals(values.length, s.length); |
| for (int i = 0; i < values.length; i++) { |
| Expect.equals(values[i], s.codeUnitAt(i)); |
| } |
| } |
| // No characters above 0xffff until Leg supports that. |
| var long = "\u{0}\u{00}\u{000}\u{0000}\u{00000}\u{000000}" |
| "\u{1}\u{01}\u{001}\u{00001}" |
| "\u{ffff}\u{0ffff}\u{00ffff}"; |
| var longValues = [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0xffff, 0xffff, 0xffff]; |
| Expect.equals(longValues.length, long.length); |
| for (int i = 0; i < longValues.length; i++) { |
| Expect.equals(longValues[i], long.codeUnitAt(i)); |
| } |
| } |
| |
| testIdentityEscapes() { |
| // All non-control ASCII characters escaped, except those with special |
| // meaning: b, f, n, r, t, u, v, and x (replaced by \x00). |
| var asciiLiterals = |
| "\ \!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\0\1\2\3\4\5\6\7\8\9\:\;\<\=\>" |
| "\?\@\A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z\[\\\]" |
| "\^\_\`\a\x00\c\d\e\x00\g\h\i\j\k\l\m\x00\o\p\q\x00\s\x00\x00\x00" |
| "\w\x00\y\z\{\|\}\~\"; |
| |
| Expect.equals(128 - 32, asciiLiterals.length); |
| for (int i = 32; i < 128; i++) { |
| int code = asciiLiterals.codeUnitAt(i - 32); |
| if (code != 0) { |
| Expect.equals(i, code); |
| } |
| } |
| } |
| |
| testQuotes() { |
| // The string [ "' ]. |
| String bothQuotes = ' "' "' "; |
| Expect.equals(bothQuotes, " \"' "); |
| Expect.equals(bothQuotes, ' "\' '); |
| Expect.equals(bothQuotes, """ "' """); |
| Expect.equals(bothQuotes, ''' "' '''); |
| Expect.equals(bothQuotes, r""" "' """); |
| Expect.equals(bothQuotes, r''' "' '''); |
| } |
| |
| testRawStrings() { |
| String raw1 = r'\x00'; |
| Expect.equals(4, raw1.length); |
| Expect.equals(0x5c, raw1.codeUnitAt(0)); |
| } |
| |
| main() { |
| // Test \x??. |
| testXEscapes(); |
| // Test \u???? and \u{?+}. |
| testUEscapes(); |
| // Test \b, \f, \n, \r, \t, \v. |
| testSingleCharacterEscapes(); |
| // Test all other single character (identity) escaeps. |
| testIdentityEscapes(); |
| // Test that quotes are handled correctly. |
| testQuotes(); |
| // Test that raw strings are raw. |
| testRawStrings(); |
| } |