24 lines
754 B
TypeScript
24 lines
754 B
TypeScript
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import { describe, expect, it } from "vitest";
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import { cacheHitRate, formatPercent } from "./cacheUsage";
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describe("cache usage helpers", () => {
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it("calculates a token-weighted hit rate", () => {
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expect(cacheHitRate(80, 100)).toBe(80);
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});
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it("returns no rate when the provider has no eligible input", () => {
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expect(cacheHitRate(0, 0)).toBeNull();
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});
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it("formats cold misses and unavailable data distinctly", () => {
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expect(formatPercent(0)).toBe("0%");
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expect(formatPercent(null)).toBe("—");
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});
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it("does not display a partial cache hit as 100 percent", () => {
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expect(formatPercent(99.5)).toBe("99.5%");
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expect(formatPercent(99.95)).toBe("99.95%");
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expect(formatPercent(100)).toBe("100%");
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});
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});
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