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|
// Test case to cover empty string comparison folding.
//
// MCompare can fold comparison with an empty string constant and replace it
// with |string.length <op> 0|.
const strings = [
// Zero length string.
"",
// Uncommon zero length strings.
newString("", {external: true}),
// Latin-1 strings.
"a",
"ä",
"monkey",
// Two-byte strings.
"猿",
"🐒",
newString("monkey", {twoByte: true}),
];
const operators = [
"==", "===", "!=", "!==",
"<", "<=", ">=", ">",
];
for (let op of operators) {
let lhs = x => `${x} ${op} ""`;
let rhs = x => `"" ${op} ${x}`;
for (let input of [lhs, rhs]) {
let fn = Function("strings", `
const expected = strings.map(x => {
// Prevent Warp compilation when computing the expected results.
with ({}) ;
return ${input("x")};
});
for (let i = 0; i < 200; ++i) {
let idx = i % strings.length;
let str = strings[idx];
let res = ${input("str")};
assertEq(res, expected[idx]);
}
`);
fn(strings);
}
}
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