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// Copyright (c) 2016, 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 = 2.9
import "package:expect/expect.dart";
main() {
var expect = new String.fromCharCodes(
[0, 0x0a, 0x0d, 0x7f, 0xff, 0xffff, 0xd800, 0xdc00, 0xdbff, 0xdfff]);
test(string) {
Expect.equals(expect, string);
}
// Plain escapes of code points.
test("\x00\x0a\x0d\x7f\xff\uffff\u{10000}\u{10ffff}");
test("""\x00\x0a\x0d\x7f\xff\uffff\u{10000}\u{10ffff}""");
test('\x00\x0a\x0d\x7f\xff\uffff\u{10000}\u{10ffff}');
test('''\x00\x0a\x0d\x7f\xff\uffff\u{10000}\u{10ffff}''');
// Plain escapes of individual code units.
test("\x00\x0a\x0d\x7f\xff\uffff\ud800\udc00\udbff\udfff");
test("""\x00\x0a\x0d\x7f\xff\uffff\ud800\udc00\udbff\udfff""");
test('\x00\x0a\x0d\x7f\xff\uffff\ud800\udc00\udbff\udfff');
test('''\x00\x0a\x0d\x7f\xff\uffff\ud800\udc00\udbff\udfff''');
// Insert newline into multiline string.
test("""\x00
\x0d\x7f\xff\uffff\ud800\udc00\udbff\udfff""");
test('''\x00
\x0d\x7f\xff\uffff\ud800\udc00\udbff\udfff''');
// Extract code points from multi-character escape string.
test("\x00\x0a\x0d\x7f\xff\uffff"
"${"\u{10000}"[0]}${"\u{10000}"[1]}"
"${"\u{10FFFF}"[0]}${"\u{10FFFF}"[1]}");
test("\x00\x0a\x0d\x7f\xff\uffff" + "\ud800" + "\udc00\udbff" + "\udfff");
// Single line string over multiple lines with newlines inside interpolation.
test("\x00\x0a\x0d\x7f\xff${
""
}\uffff\ud800\udc00\udbff\udfff");
}