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LibJS: Implement Number.isNaN()

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Like the global isNaN() without the number coercion.
This commit is contained in:
Linus Groh 2020-04-26 18:31:56 +01:00 • committed by Andreas Kling
parent c350f5ae67
commit 7bd6b58b29
4 changed files with 38 additions and 2 deletions
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30
Libraries/LibJS/Tests/Number.isNaN.js Normal file
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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);
}