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LibJS: Add Math.sign()

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Linus Groh 2020-05-18 14:35:41 +01:00 • committed by Andreas Kling
parent bdfd1f1545
commit b27834cf16
3 changed files with 60 additions and 0 deletions
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42
Libraries/LibJS/Tests/Math.sign.js Normal file
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@ -0,0 +1,42 @@
load("test-common.js");
function isPositiveZero(value) {
return value === 0 && 1 / value === Infinity;
}
function isNegativeZero(value) {
return value === 0 && 1 / value === -Infinity;
}
try {
assert(Math.sign.length === 1);
assert(Math.sign(0.0001) === 1);
assert(Math.sign(1) === 1);
assert(Math.sign(42) === 1);
assert(Math.sign(Infinity) === 1);
assert(isPositiveZero(Math.sign(0)));
assert(isPositiveZero(Math.sign(null)));
assert(isPositiveZero(Math.sign('')));
assert(isPositiveZero(Math.sign([])));
assert(Math.sign(-0.0001) === -1);
assert(Math.sign(-1) === -1);
assert(Math.sign(-42) === -1);
assert(Math.sign(-Infinity) === -1);
assert(isNegativeZero(Math.sign(-0)));
assert(isNegativeZero(Math.sign(-null)));
assert(isNegativeZero(Math.sign(-'')));
assert(isNegativeZero(Math.sign(-[])));
assert(isNaN(Math.sign()));
assert(isNaN(Math.sign(undefined)));
assert(isNaN(Math.sign([1, 2, 3])));
assert(isNaN(Math.sign({})));
assert(isNaN(Math.sign(NaN)));
assert(isNaN(Math.sign("foo")));
console.log("PASS");
} catch (e) {
console.log("FAIL: " + e);
}