ZacharyZhang-NYandClaude Opus 5.5
86dbb4efa1
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
17 lines
694 B
TypeScript
17 lines
694 B
TypeScript
import { expect, test } from "vitest";
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import { pixelScale } from "../../src/renderer/src/shared/pixel-scale";
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test("one font pixel always covers a whole number of screen pixels, never fewer than one", () => {
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expect(pixelScale(1)).toBe(1);
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expect(pixelScale(2)).toBe(1);
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expect(pixelScale(1.5)).toBeCloseTo(4 / 3);
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expect(pixelScale(1.25)).toBeCloseTo(0.8);
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expect(pixelScale(1.75)).toBeCloseTo(8 / 7);
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expect(pixelScale(0.9)).toBeCloseTo(1 / 0.9);
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for (const ratio of [1, 1.25, 1.5, 1.75, 2, 2.5, 3]) {
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const device = 12 * pixelScale(ratio) * ratio;
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expect(Math.abs(device - Math.round(device))).toBeLessThan(1e-9);
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expect(Math.round(device) % 12).toBe(0);
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}
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});
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