added enpoint and tests to get custom emoji list

packages/rocketchat-api/package.js

@@ -36,6 +36,7 @@ Package.onUse(function(api) {
 	api.addFiles('server/v1/subscriptions.js', 'server');
 	api.addFiles('server/v1/chat.js', 'server');
 	api.addFiles('server/v1/commands.js', 'server');
+	api.addFiles('server/v1/emoji-custom.js', 'server');
 	api.addFiles('server/v1/groups.js', 'server');
 	api.addFiles('server/v1/im.js', 'server');
 	api.addFiles('server/v1/integrations.js', 'server');

packages/rocketchat-api/server/v1/emoji-custom.js

@@ -0,0 +1,7 @@
+RocketChat.API.v1.addRoute('emoji-custom', { authRequired: true }, {
+	get() {
+		const emojis = Meteor.call('listEmojiCustom');
+
+		return RocketChat.API.v1.success({ emojis });
+	}
+});

tests/end-to-end/api/12-emoji-custom.js

@@ -0,0 +1,22 @@
+/* eslint-env mocha */
+/* globals expect */
+
+import {getCredentials, api, request, credentials } from '../../data/api-data.js';
+
+describe('[EmojiCustom]', function() {
+	this.retries(0);
+
+	before(done => getCredentials(done));
+
+	describe('GET', () => {
+		it('[/emoji-custom]', (done) => {
+			request.get(api('emoji-custom'))
+				.set(credentials)
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('emojis').and.to.be.a('array');
+				})
+				.end(done);
+		});
+	});
+});