init

crates/domain/tests/attachment/content_type_test.rs

@@ -0,0 +1,38 @@
+use domain::attachment::ContentType;
+use domain::errors::DomainError;
+
+#[test]
+fn valid_content_type_is_created() {
+    let ct = ContentType::new("image/jpeg").unwrap();
+    assert_eq!(ct.value(), "image/jpeg");
+}
+
+#[test]
+fn content_type_is_lowercased() {
+    let ct = ContentType::new("Image/JPEG").unwrap();
+    assert_eq!(ct.value(), "image/jpeg");
+}
+
+#[test]
+fn content_type_trims_whitespace() {
+    let ct = ContentType::new("  audio/webm  ").unwrap();
+    assert_eq!(ct.value(), "audio/webm");
+}
+
+#[test]
+fn empty_content_type_is_rejected() {
+    let result = ContentType::new("");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn content_type_without_slash_is_rejected() {
+    let result = ContentType::new("jpeg");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn from_persistence_bypasses_validation() {
+    let ct = ContentType::from_persistence(String::new());
+    assert_eq!(ct.value(), "");
+}

crates/domain/tests/attachment/media_upload_test.rs

@@ -0,0 +1,19 @@
+use domain::attachment::{ContentType, MediaUpload};
+use domain::errors::DomainError;
+
+#[test]
+fn valid_upload_is_created() {
+    let ct = ContentType::new("image/png").unwrap();
+    let upload = MediaUpload::new(vec![1, 2, 3], ct).unwrap();
+
+    assert_eq!(upload.data(), &[1, 2, 3]);
+    assert_eq!(upload.content_type().value(), "image/png");
+    assert_eq!(upload.size(), 3);
+}
+
+#[test]
+fn empty_data_is_rejected() {
+    let ct = ContentType::new("image/png").unwrap();
+    let result = MediaUpload::new(vec![], ct);
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}