50 lines
1.4 KiB
TypeScript
50 lines
1.4 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import {
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DEFAULT_PREVIEW_ZOOM,
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MAXIMUM_PREVIEW_ZOOM,
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MINIMUM_PREVIEW_ZOOM,
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PREVIEW_ZOOM_STORAGE_KEY,
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loadPreviewZoom,
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normalizePreviewZoom,
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parsePreviewZoom,
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savePreviewZoom
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} from "../src/preview-zoom";
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function createMemoryStorage(initialValue: string | null = null) {
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let value = initialValue;
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return {
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getItem(key: string) {
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return key === PREVIEW_ZOOM_STORAGE_KEY ? value : null;
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},
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setItem(key: string, nextValue: string) {
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if (key === PREVIEW_ZOOM_STORAGE_KEY) {
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value = nextValue;
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}
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},
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read() {
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return value;
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}
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};
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}
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describe("预览缩放", () => {
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it("默认使用 100%，并限制在 50% 到 400%", () => {
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expect(parsePreviewZoom(null)).toBe(DEFAULT_PREVIEW_ZOOM);
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expect(normalizePreviewZoom(20)).toBe(MINIMUM_PREVIEW_ZOOM);
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expect(normalizePreviewZoom(450)).toBe(MAXIMUM_PREVIEW_ZOOM);
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expect(normalizePreviewZoom(124.6)).toBe(125);
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});
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it("无效手动输入回退到当前缩放值", () => {
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expect(parsePreviewZoom("", 135)).toBe(135);
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expect(parsePreviewZoom("not-a-number", 135)).toBe(135);
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});
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it("保存并恢复浏览器缩放偏好", () => {
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const storage = createMemoryStorage();
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savePreviewZoom(145, storage);
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expect(storage.read()).toBe("145");
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expect(loadPreviewZoom(storage)).toBe(145);
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});
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});
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