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import { act, renderHook } from '@testing-library/react-hooks';
import { replaceRaf } from 'raf-stub';
import useOrientation from '../src/useOrientation';
declare var requestAnimationFrame: {
reset: () => void;
step: (steps?: number, duration?: number) => void;
};
describe('useOrientation', () => {
beforeAll(() => {
replaceRaf();
});
beforeEach(() => {
(window.screen.orientation as object) = {
type: 'landscape-primary',
angle: 0,
};
(window.orientation as number) = 0;
});
afterEach(() => {
requestAnimationFrame.reset();
});
it('should be defined', () => {
expect(useOrientation).toBeDefined();
});
function getHook(...args) {
return renderHook(() => useOrientation(...args));
}
function triggerOrientation(type: string, angle: number) {
(window.screen.orientation.type as string) = type;
(window.screen.orientation.angle as number) = angle;
window.dispatchEvent(new Event('orientationchange'));
}
it('should return current window orientation', () => {
const hook = getHook();
expect(typeof hook.result.current).toBe('object');
expect(typeof hook.result.current.type).toBe('string');
expect(typeof hook.result.current.angle).toBe('number');
});
it('should use initial values in case of no parameters', () => {
const hook = getHook();
expect(hook.result.current.type).toBe('landscape-primary');
expect(hook.result.current.angle).toBe(0);
});
it('should re-render after orientation change on closest RAF', () => {
const hook = getHook();
act(() => {
triggerOrientation('portrait-secondary', 180);
requestAnimationFrame.step();
});
expect(hook.result.current.type).toBe('portrait-secondary');
expect(hook.result.current.angle).toBe(180);
});
it('should return window.orientation number if window.screen.orientation is missing', () => {
(window.screen.orientation as unknown) = undefined;
const hook = getHook();
expect(hook.result.current.type).toBe('');
expect(hook.result.current.angle).toBe(0);
});
it('should return 0 if window.orientation is not a number and if window.screen.orientation is missing', () => {
(window.screen.orientation as unknown) = undefined;
(window.orientation as unknown) = null;
const hook = getHook();
expect(hook.result.current.type).toBe('');
expect(hook.result.current.angle).toBe(0);
});
});
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