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LibJS: Add special cases for Math.cosh and add spec comments

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Although this already works in most cases in non-kvm serenity cases the
cosh and other math function tend to return incorrect values for
Infinity. This makes sure that whatever the underlying cosh function
returns Math.cosh conforms to the spec.
This commit is contained in:
davidot 2022-08-20 16:24:44 +02:00 • committed by Linus Groh
parent 379baa984d
commit b79f03182d
2 changed files with 30 additions and 5 deletions
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22
Userland/Libraries/LibJS/Tests/builtins/Math/Math.cosh.js
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@ -1,7 +1,19 @@
test("basic functionality", () => {
expect(Math.cosh).toHaveLength(1);
describe("basic functionality", () => {
test("length", () => {
expect(Math.cosh).toHaveLength(1);
});
expect(Math.cosh(0)).toBe(1);
expect(Math.cosh(1)).toBeCloseTo(1.5430806348152437);
expect(Math.cosh(-1)).toBeCloseTo(1.5430806348152437);
test("simple values", () => {
expect(Math.cosh(1)).toBeCloseTo(1.5430806348152437);
expect(Math.cosh(-1)).toBeCloseTo(1.5430806348152437);
});
test("special values", () => {
expect(Math.cosh(0)).toBe(1);
expect(Math.cosh(-0.0)).toBe(1);
expect(Math.cosh(NaN)).toBeNaN();
expect(Math.cosh(Infinity)).toBe(Infinity);
expect(Math.cosh(-Infinity)).toBe(Infinity);
});
});