test(structures): add test for Emoji structure (#11509)

* test(structures): add test for Emoji structure

* test: use realistic snowflake ids

* test(structures): getters that rely on isIdSet return null if no id set

* style: compress into one test

---------

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/structures/__tests__/emoji.test.ts

@@ -0,0 +1,66 @@
+import { DiscordSnowflake } from '@sapphire/snowflake';
+import type { APIEmoji, APIUser } from 'discord-api-types/v10';
+import { beforeEach, describe, expect, test } from 'vitest';
+import { Emoji } from '../src/emojis/Emoji.js';
+import { kPatch } from '../src/utils/symbols.js';
+
+describe('Emoji structure', () => {
+	const user: APIUser = {
+		id: '1028645863041548409',
+		username: 'username',
+		discriminator: '0000',
+		global_name: 'User',
+		avatar: 'ae786a76a887687a6eaea877866768',
+	};
+
+	const data: APIEmoji = {
+		id: '300390514065276939',
+		name: 'name',
+		roles: ['222089694387765248'],
+		user,
+		require_colons: true,
+		managed: true,
+		animated: true,
+		available: true,
+	};
+
+	let instance: Emoji;
+
+	beforeEach(() => {
+		instance = new Emoji(data);
+	});
+
+	test('Emoji has all properties', () => {
+		expect(instance.id).toBe(data.id);
+		expect(instance.name).toBe(data.name);
+		expect(instance.requireColons).toBe(data.require_colons);
+		expect(instance.managed).toBe(data.managed);
+		expect(instance.animated).toBe(data.animated);
+		expect(instance.available).toBe(data.available);
+
+		const createdTimestamp = DiscordSnowflake.timestampFrom(data.id!);
+		expect(instance.createdTimestamp).toBe(createdTimestamp);
+		expect(instance.createdDate!.valueOf()).toBe(createdTimestamp);
+	});
+
+	test('toJSON() is accurate', () => {
+		expect(instance.toJSON()).toStrictEqual(data);
+	});
+
+	test('Patching the Emoji works in place', () => {
+		const patched = instance[kPatch]({
+			available: false,
+		});
+
+		expect(patched.available).toBe(false);
+
+		expect(patched.toJSON()).toEqual({ ...data, available: false });
+		expect(patched).toBe(instance);
+	});
+
+	test('createdTimestamp/createdAt returns null if id is not set', () => {
+		const instanceWithNoId = new Emoji({ ...data, id: null });
+		expect(instanceWithNoId.createdTimestamp).toBeNull();
+		expect(instanceWithNoId.createdDate).toBeNull();
+	});
+});