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| import { beforeEach, describe, expect, it, vi } from 'vitest';
|
| import { getElementVisibleRect } from '../dom';
|
| describe('getElementVisibleRect', () => {
| // 设置浏览器视口尺寸的 mock
| beforeEach(() => {
| vi.spyOn(document.documentElement, 'clientHeight', 'get').mockReturnValue(
| 800,
| );
| vi.spyOn(window, 'innerHeight', 'get').mockReturnValue(800);
| vi.spyOn(document.documentElement, 'clientWidth', 'get').mockReturnValue(
| 1000,
| );
| vi.spyOn(window, 'innerWidth', 'get').mockReturnValue(1000);
| });
|
| it('should return default rect if element is undefined', () => {
| expect(getElementVisibleRect()).toEqual({
| bottom: 0,
| height: 0,
| left: 0,
| right: 0,
| top: 0,
| width: 0,
| });
| });
|
| it('should return default rect if element is null', () => {
| expect(getElementVisibleRect(null)).toEqual({
| bottom: 0,
| height: 0,
| left: 0,
| right: 0,
| top: 0,
| width: 0,
| });
| });
|
| it('should return correct visible rect when element is fully visible', () => {
| const element = {
| getBoundingClientRect: () => ({
| bottom: 400,
| height: 300,
| left: 200,
| right: 600,
| top: 100,
| width: 400,
| }),
| } as HTMLElement;
|
| expect(getElementVisibleRect(element)).toEqual({
| bottom: 400,
| height: 300,
| left: 200,
| right: 600,
| top: 100,
| width: 400,
| });
| });
|
| it('should return correct visible rect when element is partially off-screen at the top', () => {
| const element = {
| getBoundingClientRect: () => ({
| bottom: 200,
| height: 250,
| left: 100,
| right: 500,
| top: -50,
| width: 400,
| }),
| } as HTMLElement;
|
| expect(getElementVisibleRect(element)).toEqual({
| bottom: 200,
| height: 200,
| left: 100,
| right: 500,
| top: 0,
| width: 400,
| });
| });
|
| it('should return correct visible rect when element is partially off-screen at the right', () => {
| const element = {
| getBoundingClientRect: () => ({
| bottom: 400,
| height: 300,
| left: 800,
| right: 1200,
| top: 100,
| width: 400,
| }),
| } as HTMLElement;
|
| expect(getElementVisibleRect(element)).toEqual({
| bottom: 400,
| height: 300,
| left: 800,
| right: 1000,
| top: 100,
| width: 200,
| });
| });
|
| it('should return all zeros when element is completely off-screen', () => {
| const element = {
| getBoundingClientRect: () => ({
| bottom: 1200,
| height: 300,
| left: 1100,
| right: 1400,
| top: 900,
| width: 300,
| }),
| } as HTMLElement;
|
| expect(getElementVisibleRect(element)).toEqual({
| bottom: 800,
| height: 0,
| left: 1100,
| right: 1000,
| top: 900,
| width: 0,
| });
| });
| });
|
|
