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function warmup(fun, input_array) {
for (var index = 0; index < input_array.length; index++) {
input = input_array[index];
input_lhs = input[0];
input_rhs = input[1];
output = input[2];
for (var i = 0; i < 30; i++) {
var y = fun(input_lhs, input_rhs);
assertEq(y, output)
}
}
}
{
// Check that changing the Symbol.toPrimitive function of Date.prototype does not affect the inlined Date subtraction.
const testCases = [[new Date("2024-09-20T19:54:27.432Z"), new Date("2024-09-20T19:54:27.427Z"), 5],
[new Date("2024-09-20T19:54:27.432Z"), 1726862067427, 5],
[1726862067427, new Date("2024-09-20T19:54:27.432Z"), -5]];
const funDateSub = (a, b) => { return a - b; }
warmup(funDateSub, testCases);
const originalDateToPrimitive = Date.prototype[Symbol.toPrimitive];
let counter = 0;
Object.defineProperty(Date.prototype, Symbol.toPrimitive, {
value: function(hint) {
counter++;
return originalDateToPrimitive.call(this, hint);
},
configurable: true,
});
assertEq(funDateSub(new Date("2024-09-20T19:54:27.432Z"), new Date("2024-09-20T19:54:27.422Z")), 10);
assertEq(counter, 2);
}
{
// Check that a pre-existing Date.prototype[Symbol.toPrimitive] override does not affect the inlined Date subtraction.
let counter = 0;
const originalDateToPrimitive = Date.prototype[Symbol.toPrimitive];
Object.defineProperty(Date.prototype, Symbol.toPrimitive, {
value: function(hint) {
counter++;
return originalDateToPrimitive.call(this, hint);
},
});
const funDateSub = (a, b) => { return a - b; }
assertEq(funDateSub(new Date("2024-09-20T19:54:27.432Z"), new Date("2024-09-20T19:54:27.422Z")), 10);
assertEq(counter, 2);
const testCases = [[new Date("2024-09-20T19:54:27.432Z"), new Date("2024-09-20T19:54:27.427Z"), 5],
[new Date("2024-09-20T19:54:27.432Z"), 1726862067427, 5],
[1726862067427, new Date("2024-09-20T19:54:27.432Z"), -5]];
warmup(funDateSub, testCases);
counter = 0;
assertEq(funDateSub(new Date("2024-09-20T19:54:27.432Z"), new Date("2024-09-20T19:54:27.422Z")), 10);
assertEq(funDateSub(new Date("2024-09-20T19:54:27.432Z"), 1726862067427), 5);
assertEq(counter, 3);
}
{
// Check that using extended date classes does not affect the inlined Date subtraction.
const testCases = [[new Date("2024-09-20T19:54:27.432Z"), new Date("2024-09-20T19:54:27.427Z"), 5],
[new Date("2024-09-20T19:54:27.432Z"), 1726862067427, 5],
[1726862067427, new Date("2024-09-20T19:54:27.432Z"), -5]];
const funDateSub = (a, b) => { return a - b; }
warmup(funDateSub, testCases);
let counter = 0;
class MyDate extends Date {
[Symbol.toPrimitive]() {
counter++;
return super.valueOf();
}
}
assertEq(funDateSub(new MyDate("2024-09-20T19:54:27.432Z"), new MyDate("2024-09-20T19:54:27.422Z")), 10);
assertEq(funDateSub(1726862067427, new MyDate("2024-09-20T19:54:27.432Z")), -5);
assertEq(counter, 3);
}