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// Test comparison against single-element character strings.
function makeComparator(code) {
var str = String.fromCharCode(code);
return Function("ch", "code", `
assertEq(ch == "${str}", code == ${code} && ch.length == 1);
assertEq(ch != "${str}", code != ${code} || ch.length != 1);
assertEq(ch < "${str}", code < ${code} || (code == ${code} && ch.length < 1));
assertEq(ch <= "${str}", code < ${code} || (code == ${code} && ch.length <= 1));
assertEq(ch > "${str}", code > ${code} || (code == ${code} && ch.length > 1));
assertEq(ch >= "${str}", code > ${code} || (code == ${code} && ch.length >= 1));
`);
}
function testCompare(strings, comparator) {
// Don't Ion compile to ensure |comparator| won't be inlined.
with ({}) ;
for (let i = 0; i < 1000; ++i) {
let str = strings[i % strings.length];
comparator("", -1);
for (let j = 0; j < str.length; ++j) {
let ch = str.charAt(j);
let code = str.charCodeAt(j);
comparator(ch, code);
comparator(ch + "A", code);
}
}
}
// Compare against the Latin-1 character U+0062 ('b').
testCompare([
"",
"a", "b", "c",
"a-", "b-", "c-",
"a\u{100}", "b\u{100}", "c\u{100}",
], makeComparator(0x62));
// Compare against the maximum Latin-1 character U+00FF.
testCompare([
"",
"a", "b", "c",
"a-", "b-", "c-",
"\u{fe}", "\u{ff}", "\u{100}",
"\u{fe}-", "\u{ff}-", "\u{100}-",
], makeComparator(0xff));
// Compare against the Two-byte character U+0101.
testCompare([
"",
"a", "b", "c",
"a-", "b-", "c-",
"\u{100}", "\u{101}", "\u{102}",
"\u{100}-", "\u{101}-", "\u{102}-",
], makeComparator(0x101));