update method
Implementation
DocRefMemory update(
Map<String, dynamic> newDoc,
) {
String collId = _collRef.id;
if (_memoryDb[collId] == null) {
_memoryDb[collId] = [];
}
int index =
_memoryDb[collId]!.indexWhere((element) => element[DBRKeys.id] == _id);
if (index == -1) {
return _collRef.insertDoc(newDoc);
}
var updatedOldDoc = _memoryDb[collId]![index];
// the id of a doc can't be changed
newDoc[DBRKeys.id] = updatedOldDoc[DBRKeys.id];
newDoc.forEach((key, value) {
updatedOldDoc[key] = value;
});
return set(updatedOldDoc);
}