Function makeImageData

packages/sdk/src/adapters/iframe.test.ts:389–392

(alpha: number)

describe("alphaIsOpaque", () => {
  function makeImageData(alpha: number): ImageData {
    const data = new Uint8ClampedArray([255, 0, 0, alpha]);
    return { data, width: 1, height: 1, colorSpace: "srgb" } as unknown as ImageData;
  }

  it("returns false for a fully transparent pixel (a=0)", () => {
    expect(alphaIsOpaque(makeImageData(0))).toBe(false);