test: fix digest test

src/user/digest.js

@@ -140,6 +140,7 @@ Digest.send = async function (data) {
 		batch: 100,
 	});
 	winston.info(`[user/jobs] Digest (${data.interval}) sending completed. ${emailsSent} emails sent.`);
+	return emailsSent;
 };
 
 Digest.getDeliveryTimes = async (start, stop) => {

test/user.js

@@ -1493,7 +1493,9 @@ describe('User', () => {
 		it('should send digests', async () => {
 			const oldValue = meta.config.includeUnverifiedEmails;
 			meta.config.includeUnverifiedEmails = true;
-			const uid = await User.create({ username: 'digest', email: 'email@test.com' });
+			const uid = await User.create({ username: 'digest' });
+			await User.setUserField(uid, 'email', 'email@test.com');
+			await User.email.confirmByUid(uid);
 			await User.digest.execute({
 				interval: 'day',
 				subscribers: [uid],
@@ -1501,6 +1503,11 @@ describe('User', () => {
 			meta.config.includeUnverifiedEmails = oldValue;
 		});
 
+		it('should return 0', async () => {
+			const sent = await User.digest.send({ subscribers: [] });
+			assert.strictEqual(sent, 0);
+		});
+
 		it('should not send digests', async () => {
 			await User.digest.execute({ interval: 'month' });
 		});