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function test() {
const char = "\u1FA2";
const upperChars = char.toUpperCase();
assertEq(upperChars.length, 2);
for (var i = 0; i < 20; i++) {
var prefix1 = "a".repeat(i);
var prefix2 = ".".repeat(i);
assertEq((prefix1 + char).toUpperCase(), prefix1.toUpperCase() + upperChars);
assertEq((prefix2 + char).toUpperCase(), prefix2 + upperChars);
}
}
test();