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LibJS: Add spec comments and check for edge cases in Math.sinh
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2 changed files with 11 additions and 2 deletions
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@ -600,9 +600,14 @@ JS_DEFINE_NATIVE_FUNCTION(MathObject::log10)
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// 21.3.2.31 Math.sinh ( x ), https://tc39.es/ecma262/#sec-math.sinh
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JS_DEFINE_NATIVE_FUNCTION(MathObject::sinh)
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{
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// 1. Let n be ? ToNumber(x).
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auto number = TRY(vm.argument(0).to_number(vm));
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if (number.is_nan())
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return js_nan();
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// 2. If n is not finite or n is either +0𝔽 or -0𝔽, return n.
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if (!number.is_finite_number() || number.is_positive_zero() || number.is_negative_zero())
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return number;
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// 3. Return an implementation-approximated Number value representing the result of the hyperbolic sine of ℝ(n).
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return Value(::sinh(number.as_double()));
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}
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@ -3,4 +3,8 @@ test("basic functionality", () => {
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expect(Math.sinh(0)).toBe(0);
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expect(Math.sinh(1)).toBeCloseTo(1.1752011936438014);
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expect(Math.sinh(NaN)).toBe(NaN);
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expect(Math.sinh(Number.POSITIVE_INFINITY)).toBe(Number.POSITIVE_INFINITY);
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expect(Math.sinh(Number.NEGATIVE_INFINITY)).toBe(Number.NEGATIVE_INFINITY);
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expect(Math.sinh(-0.0)).toBe(-0.0);
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});
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