init

crates/domain/tests/entry/content_test.rs

@@ -0,0 +1,32 @@
+use domain::entry::Content;
+use domain::errors::DomainError;
+
+#[test]
+fn valid_content_is_created() {
+    let content = Content::new("went for a walk").unwrap();
+    assert_eq!(content.value(), "went for a walk");
+}
+
+#[test]
+fn content_trims_whitespace() {
+    let content = Content::new("  hello world  ").unwrap();
+    assert_eq!(content.value(), "hello world");
+}
+
+#[test]
+fn empty_content_is_rejected() {
+    let result = Content::new("");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn whitespace_only_content_is_rejected() {
+    let result = Content::new("   ");
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn from_persistence_bypasses_validation() {
+    let content = Content::from_persistence(String::new());
+    assert_eq!(content.value(), "");
+}