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// 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();
}