RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-06-29 03:42:07 +00:00
Code Issues Activity Actions

LibJS: Fix that leftshift for BigInts did not round down

Browse source 
For negative number this previously rounded towards zero instead of the
intended always rounding down.
This commit is contained in:
davidot 2022-08-20 00:23:11 +02:00 • committed by Linus Groh
parent cb49c07fb7
commit e663504df1
3 changed files with 37 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

10
Userland/Libraries/LibJS/Tests/operators/binary-bitwise-left-shift.js
View file

@ -63,3 +63,13 @@ test("shifting with non-numeric values", () => {
expect(Infinity << Infinity).toBe(0);
expect(-Infinity << Infinity).toBe(0);
});
describe("logical left shift on big ints", () => {
expect(3n << -1n).toBe(1n);
expect(3n << -2n).toBe(0n);
expect(-3n << -1n).toBe(-2n);
expect(-3n << -2n).toBe(-1n);
expect(-3n << -128n).toBe(-1n);
expect(3n << 6n).toBe(192n);
expect(3n << 0n).toBe(3n);
});