ladybird/Libraries/LibJS/Tests/Number.isNaN.js
Linus Groh 7bd6b58b29 LibJS: Implement Number.isNaN()
Like the global isNaN() without the number coercion.
2020-04-26 20:36:59 +02:00

30 lines
959 B
JavaScript

load("test-common.js");
try {
assert(Number.isNaN.length === 1);
assert(Number.isNaN(0) === false);
assert(Number.isNaN(42) === false);
assert(Number.isNaN("") === false);
assert(Number.isNaN("0") === false);
assert(Number.isNaN("42") === false);
assert(Number.isNaN(true) === false);
assert(Number.isNaN(false) === false);
assert(Number.isNaN(null) === false);
assert(Number.isNaN([]) === false);
assert(Number.isNaN(Infinity) === false);
assert(Number.isNaN(-Infinity) === false);
assert(Number.isNaN() === false);
assert(Number.isNaN(undefined) === false);
assert(Number.isNaN("foo") === false);
assert(Number.isNaN({}) === false);
assert(Number.isNaN([1, 2, 3]) === false);
assert(Number.isNaN(NaN) === true);
assert(Number.isNaN(Number.NaN) === true);
assert(Number.isNaN(0 / 0) === true);
console.log("PASS");
} catch (e) {
console.log("FAIL: " + e.message);
}