Add test to show it's broken

tests/compose/core/05_connectivity.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+
+import imaplib
+import poplib
+import smtplib
+import os
+
+SERVER='localhost'
+USERNAME='test@mailu.io'
+PASSWORD='password'
+
+def test_imap(server, username, password):
+    with imaplib.IMAP4_SSL(server) as conn:
+        conn.login(username, password)
+        if conn.status('inbox')[0] != 'OK':
+            print(f'Authenticating to imaps://{username}:{password}@{server}:993/ failed!')
+            os.exit(101)
+    with imaplib.IMAP4(server) as conn:
+        conn.starttls()
+        conn.login(username, password)
+        if conn.status('inbox')[0] != 'OK':
+            print(f'Authenticating to imap://{username}:{password}@{server}:143/ failed!')
+            os.exit(101)
+    try:
+        with imaplib.IMAP4(server) as conn:
+            conn.login(username, password)
+        print(f'Authenticating to imap://{username}:{password}@{server}:143/ worked without STARTTLS!')
+        os.exit(102)
+    except imaplib.error:
+        pass
+
+def test_pop3(server, username, password):
+    print(f'Authenticating to pop3s://{username}:{password}@{server}:995/')
+    conn = poplib.POP3_SSL(server)
+    conn.capa()
+    conn.user(username)
+    conn.pass_(password)
+    conn.close()
+    print(f'Authenticating to pop3s://{username}:{password}@{server}:110/')
+    conn = poplib.POP3(server)
+    conn.stls()
+    conn.capa()
+    conn.user(username)
+    conn.pass_(password)
+    conn.close()
+    print(f'Authenticating to pop3://{username}:{password}@{server}:110/')
+    try:
+        conn = poplib.POP3(server)
+        conn.capa()
+        conn.user(username)
+        conn.pass_(password)
+        conn.close()
+        print(f'Authenticating to pop3://{username}:{password}@{server}:110/ worked without STARTTLS!')
+        os.exit(103)
+    except poplib.error_proto:
+        pass
+
+def test_SMTP(server, username, password):
+    with smtplib.SMTP_SSL(server) as conn:
+        conn.ehlo()
+        conn.login(username, password)
+    with smtplib.SMTP(server) as conn:
+        conn.ehlo()
+        conn.starttls()
+        conn.ehlo()
+        conn.login(username, password)
+    try:
+        with smtplib.SMTP(server) as conn:
+            conn.ehlo()
+            conn.login(username, password)
+            print(f'Authenticating to smtp://{username}:{password}@{server}:25/ worked without STARTTLS!')
+            os.exit(104)
+    except smtplib.SMTPNotSupportedError:
+        pass
+
+if __name__ == '__main__':
+    test_imap(SERVER, USERNAME, PASSWORD)
+    test_pop3(SERVER, USERNAME, PASSWORD)
+    test_SMTP(SERVER, USERNAME, PASSWORD)