checkpoint

tests/derive_test.rs

@@ -1,4 +1,3 @@
-use std::hash::{Hash, Hasher};
 use hash2::Hash2;
 
 #[derive(Hash2)]
@@ -185,3 +184,33 @@ fn test_generic_enum() {
     let _ = hash_value(&e2);
     let _ = hash_value(&e3);
 }
+
+#[test]
+fn test_cow_tuple_slice() {
+    use std::borrow::Cow;
+    
+    // Test Cow<[T]> where T is a tuple
+    let data = vec![("key1", 1u32), ("key2", 2u32)];
+    let cow_borrowed: Cow<[(&str, u32)]> = Cow::Borrowed(&data);
+    let cow_owned: Cow<[(&str, u32)]> = Cow::Owned(data.clone());
+    
+    let hash1 = hash_value(&cow_borrowed);
+    let hash2 = hash_value(&cow_owned);
+    assert_eq!(hash1, hash2, "Borrowed and owned Cow should hash the same");
+    
+    // Test with nested Option
+    let with_option: Option<Cow<[(&str, u32)]>> = Some(Cow::Borrowed(&data));
+    let _ = hash_value(&with_option);
+}
+
+#[test]
+fn test_cow_str() {
+    use std::borrow::Cow;
+    
+    let borrowed: Cow<str> = Cow::Borrowed("hello");
+    let owned: Cow<str> = Cow::Owned(String::from("hello"));
+    
+    let hash1 = hash_value(&borrowed);
+    let hash2 = hash_value(&owned);
+    assert_eq!(hash1, hash2, "Borrowed and owned str Cow should hash the same");
+}