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Both chat pages capped the "conversation finished" notification body with String#length / substring, which count UTF-16 code units: a cut inside an astral character's surrogate pair rendered U+FFFD, and a body that fits 200 code points was shortened early. Extract notificationBody() so both pages share the code-point bound and the "Conversation finished" fallback, and add boundary regressions. Co-authored-by: 一片一片 <192845873+gdut4140@users.noreply.github.com>
37 lines
1.4 KiB
TypeScript
37 lines
1.4 KiB
TypeScript
import { expect, test } from "@rstest/core";
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import {
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MAX_NOTIFICATION_BODY_CODE_POINTS,
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notificationBody,
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} from "@/core/notification/body";
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const LONE_SURROGATE =
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/[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?<![\uD800-\uDBFF])[\uDC00-\uDFFF]/;
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test("quotes the last message when it fits", () => {
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expect(notificationBody("Done in 3 steps.")).toBe("Done in 3 steps.");
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});
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test("falls back when there is no text to quote", () => {
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expect(notificationBody(null)).toBe("Conversation finished");
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expect(notificationBody(undefined)).toBe("Conversation finished");
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expect(notificationBody("")).toBe("Conversation finished");
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expect(notificationBody("", "Custom fallback")).toBe("Custom fallback");
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});
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test("a body that fits the code-point budget keeps its trailing emoji", () => {
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// 200 code points but 201 UTF-16 units: UTF-16 counting would cut this.
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const text = `${"a".repeat(MAX_NOTIFICATION_BODY_CODE_POINTS - 1)}😀`;
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expect(notificationBody(text)).toBe(text);
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});
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test("a truncated body never ends in half an emoji", () => {
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// 201 code points; the old UTF-16 cut landed inside the surrogate pair.
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const text = `${"a".repeat(MAX_NOTIFICATION_BODY_CODE_POINTS - 1)}😀b`;
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const body = notificationBody(text);
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expect(body).toBe(
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`${"a".repeat(MAX_NOTIFICATION_BODY_CODE_POINTS - 1)}😀...`,
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);
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expect(body).not.toMatch(LONE_SURROGATE);
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});
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