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8337a80ae6
* fix(frontend): count code points when previewing table cells and memory facts artifact-table-preview cut a cell at 120 UTF-16 code units and memory-settings-page's truncateFactPreview measured and cut fact previews at 140, so an emoji spanning two units could be split at the cut — the lone half renders as U+FFFD — and a preview that already fit the documented code-point budget was still shortened. Both previews now share truncateToCodePoints in core/utils/text, which measures and cuts by code points, the same rule briefReason in core/scheduled-tasks/format.ts already follows. Add unit tests for the helper and a DOM regression test covering both the fits-exactly and the cut-inside-an-emoji cases. * fix(frontend): count code points in the artifact-cell expand gate too The expandable gate still measured value.length (UTF-16 units), so a 120-code-point cell ending in an astral character opened the expand control even though the inline preview already showed the whole cell — the same units-vs-code-points mismatch the preview cut fixed. The gate now counts Array.from(value), and the boundary test asserts the fits cell renders as a plain cell with no expand control while the overflows cell keeps its button and whole-emoji cut. Suggested-by: gdut4140 (port of the #7509 expandable gate)
35 lines
1.3 KiB
TypeScript
35 lines
1.3 KiB
TypeScript
import { describe, expect, it } from "@rstest/core";
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import { truncateToCodePoints } from "@/core/utils/text";
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const loneSurrogate = /[\uD800-\uDBFF](?![\uDC00-\uDFFF])/;
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describe("truncateToCodePoints", () => {
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it("returns a value that fits the code-point budget unchanged", () => {
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// 120 code points but 121 UTF-16 units: the whole value fits.
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const fits = `${"a".repeat(118)}😀b`;
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expect(truncateToCodePoints(fits, 120)).toBe(fits);
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});
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it("never splits a surrogate pair at the cut", () => {
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// 122 code points / 123 UTF-16 units: the cut lands after the whole emoji.
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const overflow = `${"a".repeat(119)}😀bc`;
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const truncated = truncateToCodePoints(overflow, 120);
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expect(truncated).toBe(`${"a".repeat(119)}😀`);
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expect(truncated).not.toMatch(loneSurrogate);
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});
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it("spends the ellipsis inside the budget", () => {
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const overflow = `${"a".repeat(139)}😀x`;
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const truncated = truncateToCodePoints(overflow, 140, "...");
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expect(truncated).toBe(`${"a".repeat(137)}...`);
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expect(truncated.length).toBeLessThanOrEqual(140);
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expect(truncated).not.toMatch(loneSurrogate);
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});
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it("falls back to a plain cut when the budget cannot hold the ellipsis", () => {
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expect(truncateToCodePoints("abcd", 2, "...")).toBe("ab");
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expect(truncateToCodePoints("abcd", 3, "...")).toBe("abc");
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});
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});
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