mirror of
https://github.com/RGBCube/serenity
synced 2025-10-26 09:22:34 +00:00
c45922c637
The JS behaviour of exponentiation on two number typed values is not a simple matter of forwarding to ::pow(double, double). So, this factors out the Math.pow logic to allow it to be shared with Value::exp.
52 lines
1.5 KiB
JavaScript
52 lines
1.5 KiB
JavaScript
test("regular exponentiation", () => {
|
|
expect(2 ** 0).toBe(1);
|
|
expect(2 ** 1).toBe(2);
|
|
expect(2 ** 2).toBe(4);
|
|
expect(2 ** 3).toBe(8);
|
|
expect(3 ** 2).toBe(9);
|
|
expect(0 ** 0).toBe(1);
|
|
expect(2 ** (3 ** 2)).toBe(512);
|
|
expect(2 ** (3 ** 2)).toBe(512);
|
|
expect((2 ** 3) ** 2).toBe(64);
|
|
});
|
|
|
|
test("exponentiation with negatives", () => {
|
|
expect(2 ** -3).toBe(0.125);
|
|
expect((-2) ** 3).toBe(-8);
|
|
|
|
// FIXME: This should fail :)
|
|
// expect("-2 ** 3").not.toEval();
|
|
});
|
|
|
|
test("exponentiation with non-numeric primitives", () => {
|
|
expect("2" ** "3").toBe(8);
|
|
expect("" ** []).toBe(1);
|
|
expect([] ** null).toBe(1);
|
|
expect(null ** null).toBe(1);
|
|
expect(undefined ** null).toBe(1);
|
|
});
|
|
|
|
test("exponentiation that produces NaN", () => {
|
|
expect(NaN ** 2).toBeNaN();
|
|
expect(2 ** NaN).toBeNaN();
|
|
expect(undefined ** 2).toBeNaN();
|
|
expect(2 ** undefined).toBeNaN();
|
|
expect(null ** undefined).toBeNaN();
|
|
expect(2 ** "foo").toBeNaN();
|
|
expect("foo" ** 2).toBeNaN();
|
|
});
|
|
|
|
test("exponentiation with infinities", () => {
|
|
expect((-1) ** Infinity).toBeNaN();
|
|
expect(0 ** Infinity).toBe(0);
|
|
expect(1 ** Infinity).toBeNaN();
|
|
expect((-1) ** -Infinity).toBeNaN();
|
|
expect(0 ** -Infinity).toBe(Infinity);
|
|
expect(1 ** -Infinity).toBeNaN();
|
|
expect(Infinity ** -1).toBe(0);
|
|
expect(Infinity ** 0).toBe(1);
|
|
expect(Infinity ** 1).toBe(Infinity);
|
|
expect((-Infinity) ** -1).toBe(-0);
|
|
expect((-Infinity) ** 0).toBe(1);
|
|
expect((-Infinity) ** 1).toBe(-Infinity);
|
|
});
|