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// Test relational comparison when one operand is null or undefined.
function test(xs) {
for (let i = 0; i < 200; ++i) {
let x = xs[i % xs.length];
// The result is equal when compared to the result with explicit ToNumber conversions.
// Test when null-or-undefined is on the right-hand side.
assertEq(x < nullOrUndef, (+x) < (+nullOrUndef));
assertEq(x <= nullOrUndef, (+x) <= (+nullOrUndef));
assertEq(x >= nullOrUndef, (+x) >= (+nullOrUndef));
assertEq(x > nullOrUndef, (+x) > (+nullOrUndef));
// Test when null-or-undefined is on the left-hand side.
assertEq(nullOrUndef < x, (+nullOrUndef) < (+x));
assertEq(nullOrUndef <= x, (+nullOrUndef) <= (+x));
assertEq(nullOrUndef >= x, (+nullOrUndef) >= (+x));
assertEq(nullOrUndef > x, (+nullOrUndef) > (+x));
}
}
function runTest(inputs) {
let fNull = Function(`return ${test}`.replaceAll("nullOrUndef", "null"))();
fNull(inputs);
let fUndefined = Function(`return ${test}`.replaceAll("nullOrUndef", "undefined"))();
fUndefined(inputs);
}
// Null inputs.
runTest([
null,
]);
// Undefined inputs.
runTest([
undefined,
]);
// Null or undefined inputs.
runTest([
null,
undefined,
]);
// Int32 inputs
runTest([
-0x8000_0000,
-0x7fff_ffff,
-0x7fff_fffe,
-2,
-1,
0,
1,
2,
0x7fff_fffe,
0x7fff_ffff,
]);
// Number inputs
runTest([
Number.NEGATIVE_INFINITY,
-Number.MAX_VALUE,
Number.MIN_SAFE_INTEGER,
-1.5,
-0.5,
-Number.EPSILON,
-Number.MIN_VALUE,
-0,
0,
Number.MIN_VALUE,
Number.EPSILON,
0.5,
1.5,
Number.MAX_SAFE_INTEGER,
Number.MAX_VALUE,
Number.POSITIVE_INFINITY,
NaN,
]);
// Boolean inputs.
runTest([
true, false,
]);
// String inputs
runTest([
"",
"0", "-0", "0.0", "0e100",
"1", "1.5", "-1234", "-1e0",
"Infinity", "NaN", "not-a-number",
]);