init

crates/domain/tests/entry/mood_test.rs

@@ -0,0 +1,40 @@
+use domain::entry::Mood;
+use domain::errors::DomainError;
+
+#[test]
+fn mood_values_map_to_expected_scale() {
+    assert_eq!(Mood::Awful.value(), 1);
+    assert_eq!(Mood::Bad.value(), 2);
+    assert_eq!(Mood::Meh.value(), 3);
+    assert_eq!(Mood::Good.value(), 4);
+    assert_eq!(Mood::Rad.value(), 5);
+}
+
+#[test]
+fn mood_ordering_reflects_scale() {
+    assert!(Mood::Awful < Mood::Bad);
+    assert!(Mood::Bad < Mood::Meh);
+    assert!(Mood::Meh < Mood::Good);
+    assert!(Mood::Good < Mood::Rad);
+}
+
+#[test]
+fn valid_values_convert_to_mood() {
+    for value in 1..=5u8 {
+        let mood = Mood::try_from(value);
+        assert!(mood.is_ok());
+        assert_eq!(mood.unwrap().value(), value);
+    }
+}
+
+#[test]
+fn zero_is_invalid_mood_value() {
+    let result = Mood::try_from(0u8);
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}
+
+#[test]
+fn six_is_invalid_mood_value() {
+    let result = Mood::try_from(6u8);
+    assert!(matches!(result, Err(DomainError::InvalidInput(_))));
+}