58 lines
1.5 KiB
TypeScript
58 lines
1.5 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import {
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getPdfCanvasRenderScale,
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getPdfPageCssDimensions,
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getPrecisePdfDocumentWidth,
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PDF_PAGE_CSS_SCALE
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} from "../src/pdf-page-geometry";
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describe("精确 PDF 页面尺寸", () => {
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it("按 96 CSS PPI 映射 PDF 点尺寸", () => {
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expect(PDF_PAGE_CSS_SCALE).toBeCloseTo(4 / 3);
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expect(
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getPdfPageCssDimensions(595.275591, 841.889764)
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).toEqual({
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width: expect.closeTo(793.700788, 5),
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height: expect.closeTo(1122.519685, 5)
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});
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});
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it("按预览缩放比例调整 PDF 页面显示尺寸", () => {
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expect(
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getPdfPageCssDimensions(595.275591, 841.889764, 1.5)
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).toEqual({
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width: expect.closeTo(1190.551182, 5),
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height: expect.closeTo(1683.779528, 5)
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});
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});
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it("结合显示宽度和设备像素比计算 Canvas 比例", () => {
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expect(getPdfCanvasRenderScale(600, 800, 2)).toBeCloseTo(
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8 / 3
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);
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expect(getPdfCanvasRenderScale(0, 800, 2)).toBe(0);
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});
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it.each([
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[50, 457],
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[100, 854],
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[120, 1013],
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[400, 3235]
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])("在 %i%% 缩放下把双侧固定留白计入滚动宽度", (zoom, expected) => {
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expect(
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getPrecisePdfDocumentWidth(
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[595.275591],
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zoom / 100,
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30
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)
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).toBe(expected);
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});
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it("按混合纸张中最宽页面计算精确预览滚动宽度", () => {
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expect(
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getPrecisePdfDocumentWidth([595.275591, 792], 1.2, 30)
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).toBe(1328);
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expect(getPrecisePdfDocumentWidth([], 1.2, 30)).toBe(0);
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});
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});
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