test: baseline tests for emojione behavior replaced by the native emoji migration

apps/meteor/tests/unit/app/emoji/emojioneBaseline.spec.ts

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+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import emojione from 'emojione';
+
+import { getEmojiConfig } from '../../../../app/emoji-emojione/lib/getEmojiConfig';
+
+// Baseline for the native-emoji migration: these assertions document behavior 8.6 users rely on.
+// The counterpart PR against release-8.7.0 carries the same expectations as (currently failing)
+// tests over the new emoji-native implementation.
+describe('emojione baseline (pre-native-migration behavior)', () => {
+	describe('shortnameToUnicode', () => {
+		const cases: [string, string][] = [
+			[':red_haired:', '🦰'],
+			[':curly_haired:', '🦱'],
+			[':bald:', '🦲'],
+			[':white_haired:', '🦳'],
+			[':iphone:', '📱'],
+		];
+
+		cases.forEach(([shortname, unicode]) => {
+			it(`converts ${shortname}`, () => {
+				expect(emojione.shortnameToUnicode(shortname)).to.equal(unicode);
+			});
+		});
+
+		it('converts a shortcode that directly follows an unknown :token:', () => {
+			expect(emojione.shortnameToUnicode('12:30:fire:')).to.equal('12:30🔥');
+		});
+
+		it('renders the hand-patched legacy shortcodes in messages', () => {
+			// shortnameToUnicode drops the U+20E3 combiner for these hand-patched entries even on 8.6;
+			// the message path users actually saw went through render (emojione.toImage)
+			const html = getEmojiConfig().render(':digit_one:');
+			expect(html).to.be.a('string');
+			expect(html).to.include('digit_one');
+		});
+	});
+
+	describe('toShort', () => {
+		it('maps bare (unqualified) text-presentation emojis to shortnames', () => {
+			expect(emojione.toShort('❤')).to.equal(':heart:');
+			expect(emojione.toShort('☺')).to.equal(':relaxed:');
+		});
+	});
+
+	describe('picker rendering', () => {
+		it('renders the hand-patched legacy shortcodes', () => {
+			const image = getEmojiConfig().renderPicker(':digit_one:');
+			expect(image).to.be.a('string');
+			expect(image).to.include('digit_one');
+		});
+	});
+});

ee/packages/pdf-worker/src/templates/ChatTranscript/markup/emoji.spec.ts

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+import emojione from 'emoji-toolkit';
+
+// Baseline for the native-emoji migration: the transcript's unicode -> shortname conversion
+// (EmojiSpan) uses emoji-toolkit, whose vocabulary matches the app emoji list. The counterpart
+// PR against release-8.7.0 carries the same expectations over the new emojibase-based module.
+describe('emoji-toolkit shortname vocabulary (pre-native-migration baseline)', () => {
+	it('names 👍 :thumbsup:', () => {
+		expect(emojione.toShort('\u{1F44D}')).toBe(':thumbsup:');
+	});
+
+	it('names 😃 :smiley:', () => {
+		expect(emojione.toShort('😃')).toBe(':smiley:');
+	});
+});