init

crates/domain/tests/user/email_test.rs

@@ -0,0 +1,32 @@
+use domain::errors::DomainError;
+use domain::user::Email;
+
+#[test]
+fn valid_email_is_created() {
+    let email = Email::new("user@example.com").unwrap();
+    assert_eq!(email.value(), "user@example.com");
+}
+
+#[test]
+fn email_is_lowercased() {
+    let email = Email::new("User@Example.COM").unwrap();
+    assert_eq!(email.value(), "user@example.com");
+}
+
+#[test]
+fn email_trims_whitespace() {
+    let email = Email::new("  user@example.com  ").unwrap();
+    assert_eq!(email.value(), "user@example.com");
+}
+
+#[test]
+fn email_without_at_is_rejected() {
+    let result = Email::new("not-an-email");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn empty_email_is_rejected() {
+    let result = Email::new("");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}