improvements

src/tests/config_smtp.rs

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2026 Mateusz Gruszczyński @linuxiarz.pl
+ * Source-Available Code / Dual-Licensed.
+ *
+ * Free for non-commercial and evaluation use under terms of BSL/GPLv3.
+ * Commercial or production use requires a valid paid license.
+ * See LICENSE file in repository root for details.
+ */
+
+use super::*;
+
+#[test]
+fn detects_security_from_standard_ports() {
+    assert_eq!(smtp_security_for_port(25), SmtpSecurity::None);
+    assert_eq!(smtp_security_for_port(465), SmtpSecurity::Tls);
+    assert_eq!(smtp_security_for_port(587), SmtpSecurity::StartTls);
+    assert_eq!(smtp_security_for_port(2525), SmtpSecurity::None);
+}
+
+#[test]
+fn accepts_supported_security_modes() {
+    assert_eq!(parse_smtp_security("none").unwrap(), SmtpSecurity::None);
+    assert_eq!(
+        parse_smtp_security("starttls").unwrap(),
+        SmtpSecurity::StartTls
+    );
+    assert_eq!(parse_smtp_security("tls").unwrap(), SmtpSecurity::Tls);
+    assert!(parse_smtp_security("auto").is_err());
+}
+
+#[test]
+fn normalizes_smtp_from() {
+    assert_eq!(
+        normalize_smtp_from(" \"RustPad <rustpad@notes.example>\" ".to_owned()).unwrap(),
+        "RustPad <rustpad@notes.example>"
+    );
+    assert!(normalize_smtp_from("RustPad".to_owned()).is_err());
+}