f Test we can operate at max chars (in particular on Windows)

Author: tnull

lightning-persister/src/test_utils.rs

@@ -1,4 +1,4 @@
-use lightning::util::persist::KVStore;
+use lightning::util::persist::{KVStore, KVSTORE_NAMESPACE_KEY_MAX_LEN};
 
 use std::panic::RefUnwindSafe;
 
@@ -31,4 +31,20 @@ pub(crate) fn do_read_write_remove_list_persist<K: KVStore + RefUnwindSafe>(kv_s
 
 	let listed_keys = kv_store.list(namespace, sub_namespace).unwrap();
 	assert_eq!(listed_keys.len(), 0);
+
+	// Ensure we have no issue operating with namespace/sub_namespace/key being KVSTORE_NAMESPACE_KEY_MAX_LEN
+	let max_chars: String = std::iter::repeat('A').take(KVSTORE_NAMESPACE_KEY_MAX_LEN).collect();
+	kv_store.write(&max_chars, &max_chars, &max_chars, &data).unwrap();
+
+	let listed_keys = kv_store.list(&max_chars, &max_chars).unwrap();
+	assert_eq!(listed_keys.len(), 1);
+	assert_eq!(listed_keys[0], max_chars);
+
+	let read_data = kv_store.read(&max_chars, &max_chars, &max_chars).unwrap();
+	assert_eq!(data, &*read_data);
+
+	kv_store.remove(&max_chars, &max_chars, &max_chars, false).unwrap();
+
+	let listed_keys = kv_store.list(&max_chars, &max_chars).unwrap();
+	assert_eq!(listed_keys.len(), 0);
 }