summarizeParentMessage,

} from "./thread-parent-context.js";

// Matches an unpaired UTF-16 surrogate (lone high or lone low), without relying

// on the ES2024 String.prototype.isWellFormed() runtime API.

const UNPAIRED_SURROGATE_RE =

/[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?<![\uD800-\uDBFF])[\uDC00-\uDFFF]/;

describe("summarizeParentMessage", () => {

it("returns undefined for missing message", () => {

expect(summarizeParentMessage(undefined)).toBeUndefined();

expect(summary?.text.length).toBeLessThanOrEqual(400);

expect(summary?.text.endsWith("…")).toBe(true);

});

it("keeps truncated parent text well-formed when truncating surrogate pairs", () => {

const msg: GraphThreadMessage = {

id: "p1",

from: { user: { displayName: "Dana" } },

body: { content: `${"a".repeat(398)}🦞${"b".repeat(50)}`, contentType: "text" },

};

const summary = summarizeParentMessage(msg);

expect(summary?.text).not.toMatch(UNPAIRED_SURROGATE_RE);

expect(summary?.text).toBe(`${"a".repeat(398)}…`);

expect(summary?.text.endsWith("\ud83e…")).toBe(false);

});

});

describe("formatParentContextEvent", () => {

asDateTimestampMs,

resolveExpiresAtMsFromDurationMs,

} from "openclaw/plugin-sdk/number-runtime";

import { truncateUtf16Safe } from "openclaw/plugin-sdk/text-utility-runtime";

import { fetchChannelMessage, stripHtmlFromTeamsMessage } from "./graph-thread.js";

import type { GraphThreadMessage } from "./graph-thread.js";

return {

sender,

text:

text.length > PARENT_TEXT_MAX_CHARS ? `${text.slice(0, PARENT_TEXT_MAX_CHARS - 1)}…` : text,

text.length > PARENT_TEXT_MAX_CHARS

? `${truncateUtf16Safe(text, PARENT_TEXT_MAX_CHARS - 1)}…`

: text,

};

}