text: import isPowerOfTwo from "./solution.js";
  
  test("example 1", () => {
    expect(isPowerOfTwo(1)).toBe(true);
  });
  
  test("example 2", () => {
    expect(isPowerOfTwo(16)).toBe(true);
  });
  
  test("example 3", () => {
    expect(isPowerOfTwo(218)).toBe(false);
  });
  
  test("example 4", () => {
    expect(isPowerOfTwo(-16)).toBe(false);
  });
  