test/connection: add units

test/connection.ts

@@ -1,11 +1,50 @@
 import test from 'ava';
+import { SMTPServer } from 'smtp-server';
 
 import { SMTPConnection } from '../email.js';
 
+const port = 6666;
+
 test('accepts a custom logger', async (t) => {
 	const logger = () => {
 		/** ø */
 	};
-	const connection = new SMTPConnection({ logger });
-	t.is(Reflect.get(connection, 'log'), logger);
+	t.is(Reflect.get(new SMTPConnection({ logger }), 'log'), logger);
+});
+
+test('can connect without ssl', async (t) => {
+	return await t.notThrowsAsync(
+		new Promise<void>((resolve, reject) => {
+			const server = new SMTPServer().listen(port, () => {
+				const connection = new SMTPConnection({ port });
+				connection.connect((err) => {
+					server.close();
+					connection.close(true);
+					if (err) {
+						reject(err);
+					} else {
+						resolve();
+					}
+				}, port);
+			});
+		})
+	);
+});
+test('can connect with ssl', async (t) => {
+	return await t.notThrowsAsync(
+		new Promise<void>((resolve, reject) => {
+			const server = new SMTPServer({ secure: true }).listen(port + 1, () => {
+				const connection = new SMTPConnection({ port: port + 1, tls: true });
+				connection.connect((err) => {
+					server.close();
+					connection.close(true);
+					if (err) {
+						reject(err);
+					} else {
+						resolve();
+					}
+				}, port);
+			});
+		})
+	);
 });