init

crates/domain/tests/user/username_test.rs

@@ -0,0 +1,45 @@
+use domain::errors::DomainError;
+use domain::user::Username;
+
+#[test]
+fn valid_username_is_created() {
+    let username = Username::new("gabriel").unwrap();
+    assert_eq!(username.value(), "gabriel");
+}
+
+#[test]
+fn username_with_dots_and_underscores_is_valid() {
+    let username = Username::new("gabriel.k_99").unwrap();
+    assert_eq!(username.value(), "gabriel.k_99");
+}
+
+#[test]
+fn username_trims_whitespace() {
+    let username = Username::new("  gabriel  ").unwrap();
+    assert_eq!(username.value(), "gabriel");
+}
+
+#[test]
+fn empty_username_is_rejected() {
+    let result = Username::new("");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn username_longer_than_32_chars_is_rejected() {
+    let long = "a".repeat(33);
+    let result = Username::new(long);
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn username_with_special_chars_is_rejected() {
+    let result = Username::new("gabriel@home");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn username_with_spaces_is_rejected() {
+    let result = Username::new("gabriel k");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}