52 lines
1.0 KiB
TypeScript
52 lines
1.0 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import {
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getScrollProgress,
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getSyncedScrollTop
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} from "../src/scroll-sync";
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describe("编辑与预览滚动同步", () => {
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it("按可滚动范围计算阅读进度", () => {
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expect(
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getScrollProgress({
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scrollTop: 600,
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scrollHeight: 1600,
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clientHeight: 400
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})
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).toBe(0.5);
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});
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it("把源区域进度映射到目标区域", () => {
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expect(
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getSyncedScrollTop(
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{
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scrollTop: 600,
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scrollHeight: 1600,
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clientHeight: 400
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},
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{
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scrollTop: 0,
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scrollHeight: 5000,
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clientHeight: 1000
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}
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)
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).toBe(2000);
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});
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it("处理无滚动范围和越界位置", () => {
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expect(
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getScrollProgress({
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scrollTop: 100,
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scrollHeight: 500,
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clientHeight: 500
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})
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).toBe(0);
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expect(
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getScrollProgress({
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scrollTop: 1800,
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scrollHeight: 1600,
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clientHeight: 400
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})
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).toBe(1);
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});
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});
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