c124fb1f2c
The comment claimed 250 groups -> 499 chars -> slice past 500; the input is 120 "a b " groups collapsing to 479 chars, under the cap with no slice. Correct the comment and assert the 479 length. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
60 lines
2.3 KiB
TypeScript
60 lines
2.3 KiB
TypeScript
import { describe, it, expect } from "vitest";
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import { sanitizeCaption } from "@/features/editor/components/common/use-caption-control.tsx";
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/**
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* `sanitizeCaption` = collapse every whitespace run to a single space + trim +
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* cap at 500 chars. Captions are plain visible text, so this is a softer
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* normalization than alt-text sanitization.
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*/
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describe("sanitizeCaption", () => {
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it("trims leading and trailing whitespace", () => {
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expect(sanitizeCaption(" hello ")).toBe("hello");
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});
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it("collapses internal whitespace runs to a single space", () => {
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expect(sanitizeCaption("a b c")).toBe("a b c");
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});
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it("treats tab, newline and CRLF as whitespace", () => {
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expect(sanitizeCaption("a\tb")).toBe("a b");
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expect(sanitizeCaption("a\nb")).toBe("a b");
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expect(sanitizeCaption("a\r\nb")).toBe("a b");
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expect(sanitizeCaption("line1\n\n\nline2")).toBe("line1 line2");
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});
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it("treats unicode whitespace (no-break space) as a separator", () => {
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// U+00A0 NO-BREAK SPACE is matched by the \s class.
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expect(sanitizeCaption("a b")).toBe("a b");
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});
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it("returns empty string for whitespace-only input", () => {
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expect(sanitizeCaption(" ")).toBe("");
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expect(sanitizeCaption("")).toBe("");
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});
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it("keeps a caption at the 500-char limit unchanged", () => {
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const exact = "x".repeat(500);
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expect(sanitizeCaption(exact)).toHaveLength(500);
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expect(sanitizeCaption(exact)).toBe(exact);
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});
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it("slices a caption longer than 500 chars down to 500", () => {
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const tooLong = "y".repeat(600);
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const result = sanitizeCaption(tooLong);
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expect(result).toHaveLength(500);
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expect(result).toBe("y".repeat(500));
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});
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it("collapses whitespace before applying the 500-char cap", () => {
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// 120 "a b " groups (600 raw chars) collapse to "a b a b ..." = 479 chars
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// after trimming the trailing space, which stays under the 500 cap — so only
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// the collapse is exercised here, no slice. (See the dedicated >500 test
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// above for the slice boundary.)
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const input = "a b ".repeat(120); // lots of double spaces
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const result = sanitizeCaption(input);
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expect(result).toHaveLength(479);
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expect(result.length).toBeLessThanOrEqual(500);
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expect(result).not.toMatch(/\s{2,}/);
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});
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});
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