@dxzmpk/js-algorithms-data-structures/src/algorithms/math/is-power-of-two/__test__/isPowerOfTwoBitwise.test.js

Algorithms and data-structures implemented on JavaScript

import isPowerOfTwoBitwise from '../isPowerOfTwoBitwise';

describe('isPowerOfTwoBitwise', () => {
  it('should check if the number is made by multiplying twos', () => {
    expect(isPowerOfTwoBitwise(-1)).toBe(false);
    expect(isPowerOfTwoBitwise(0)).toBe(false);
    expect(isPowerOfTwoBitwise(1)).toBe(true);
    expect(isPowerOfTwoBitwise(2)).toBe(true);
    expect(isPowerOfTwoBitwise(3)).toBe(false);
    expect(isPowerOfTwoBitwise(4)).toBe(true);
    expect(isPowerOfTwoBitwise(5)).toBe(false);
    expect(isPowerOfTwoBitwise(6)).toBe(false);
    expect(isPowerOfTwoBitwise(7)).toBe(false);
    expect(isPowerOfTwoBitwise(8)).toBe(true);
    expect(isPowerOfTwoBitwise(10)).toBe(false);
    expect(isPowerOfTwoBitwise(12)).toBe(false);
    expect(isPowerOfTwoBitwise(16)).toBe(true);
    expect(isPowerOfTwoBitwise(31)).toBe(false);
    expect(isPowerOfTwoBitwise(64)).toBe(true);
    expect(isPowerOfTwoBitwise(1024)).toBe(true);
    expect(isPowerOfTwoBitwise(1023)).toBe(false);
  });
});