Henry
8f937c3b47
Co-authored-by: nova28 <17953305+nova28@users.noreply.github.com> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com> Co-authored-by: Carlos Florencio <carlosmflorencio@gmail.com>
58 lines
1.9 KiB
TypeScript
58 lines
1.9 KiB
TypeScript
import { describe, it, expect } from "vitest";
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import { formatBytes, formatDistinctByteSizes } from "./format-bytes";
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describe("formatBytes", () => {
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it("returns '-' for nullish input", () => {
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expect(formatBytes(null)).toBe("-");
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expect(formatBytes(undefined)).toBe("-");
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});
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it("returns '0 B' for zero or negative input", () => {
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expect(formatBytes(0)).toBe("0 B");
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expect(formatBytes(-1)).toBe("0 B");
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});
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it("renders integer bytes below 1 KB", () => {
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expect(formatBytes(1)).toBe("1 B");
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expect(formatBytes(1023)).toBe("1023 B");
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});
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it("renders KB with one decimal", () => {
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expect(formatBytes(1024)).toBe("1.0 KB");
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expect(formatBytes(2048)).toBe("2.0 KB");
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});
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it("renders MB / GB / TB", () => {
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expect(formatBytes(1024 * 1024)).toBe("1.0 MB");
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expect(formatBytes(1024 * 1024 * 1024)).toBe("1.0 GB");
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expect(formatBytes(1024 ** 4)).toBe("1.0 TB");
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});
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it("clamps to TB above the largest unit", () => {
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expect(formatBytes(1024 ** 5)).toBe("1024.0 TB");
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expect(formatBytes(1024 ** 6)).toBe("1048576.0 TB");
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});
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it("returns '-' for non-finite input", () => {
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expect(formatBytes(NaN)).toBe("-");
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expect(formatBytes(Infinity)).toBe("-");
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expect(formatBytes(-Infinity)).toBe("-");
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});
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});
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describe("formatDistinctByteSizes", () => {
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it("uses formatBytes for both values when they render distinctly", () => {
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expect(formatDistinctByteSizes(262144, 300000)).toEqual(["256.0 KB", "293.0 KB"]);
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});
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it("falls back to exact byte counts when the rounded forms would collide", () => {
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// Both round to "256.0 KB" under formatBytes' one-decimal precision.
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expect(formatBytes(262144)).toBe(formatBytes(262150));
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expect(formatDistinctByteSizes(262144, 262150)).toEqual(["262144 B", "262150 B"]);
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});
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it("does not fall back when the two values are exactly equal", () => {
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expect(formatDistinctByteSizes(262144, 262144)).toEqual(["256.0 KB", "256.0 KB"]);
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});
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});
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