Fix bug in diff walker; Create simple_tree_diffs unit test for determ…

rsky-pds/src/repo/data_diff.rs

@@ -4,7 +4,7 @@ use crate::repo::mst::diff::mst_diff;
 use crate::repo::mst::{NodeEntry, MST};
 use anyhow::Result;
 use lexicon_cid::Cid;
-use std::collections::BTreeMap;
+use std::collections::HashMap;
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct DataAdd {
@@ -27,9 +27,9 @@ pub struct DataDelete {
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct DataDiff {
-    pub adds: BTreeMap<String, DataAdd>,
-    pub updates: BTreeMap<String, DataUpdate>,
-    pub deletes: BTreeMap<String, DataDelete>,
+    pub adds: HashMap<String, DataAdd>,
+    pub updates: HashMap<String, DataUpdate>,
+    pub deletes: HashMap<String, DataDelete>,
 
     pub new_mst_blocks: BlockMap,
     pub new_leaf_cids: CidSet,
@@ -39,9 +39,9 @@ pub struct DataDiff {
 impl DataDiff {
     pub fn new() -> Self {
         DataDiff {
-            adds: BTreeMap::new(),
-            updates: BTreeMap::new(),
-            deletes: BTreeMap::new(),
+            adds: HashMap::new(),
+            updates: HashMap::new(),
+            deletes: HashMap::new(),
             new_mst_blocks: BlockMap::new(),
             new_leaf_cids: CidSet::new(None),
             removed_cids: CidSet::new(None),

rsky-pds/src/repo/mst/mod.rs

@@ -1387,7 +1387,7 @@ mod tests {
     use anyhow::Result;
     use rand::seq::SliceRandom;
     use rand::thread_rng;
-    use std::collections::BTreeMap;
+    use std::collections::HashMap;
 
     fn string_to_vec_u8(input: &str) -> Vec<u8> {
         input.as_bytes().to_vec()
@@ -1555,27 +1555,24 @@ mod tests {
         Ok(())
     }
 
-    /*
-    @TODO: Get this working. Currently inconsistent and canonical test is failing as well
-
+    // @TODO: Increase record sizes
     #[test]
     fn diffs() -> Result<()> {
         let mut storage =
             SqlRepoReader::new(None, "did:example:123456789abcdefghi".to_string(), None);
-        let mapping = generate_bulk_data_keys(10, Some(&mut storage))?;
+        let mapping = generate_bulk_data_keys(4, Some(&mut storage))?;
         let mut mst = MST::create(storage.clone(), None, None)?;
-        let mut to_diff = mst.clone();
-
         let entries = mapping
             .iter()
             .map(|e| (e.0.clone(), e.1.clone()))
             .collect::<Vec<(String, Cid)>>();
 
         for entry in &entries {
             mst = mst.add(&entry.0, entry.1, None)?;
-            to_diff = to_diff.add(&entry.0, entry.1, None)?;
         }
 
+        let mut to_diff = mst.clone();
+
         let to_add = generate_bulk_data_keys(2, Some(&mut storage))?
             .into_iter()
             .map(|e| (e.0, e.1))
@@ -1591,9 +1588,9 @@ mod tests {
         let to_edit = entries[2..3].to_vec();
         let to_del = entries[3..4].to_vec();
 
-        let mut expected_adds: BTreeMap<String, DataAdd> = BTreeMap::new();
-        let mut expected_updates: BTreeMap<String, DataUpdate> = BTreeMap::new();
-        let mut expected_dels: BTreeMap<String, DataDelete> = BTreeMap::new();
+        let mut expected_adds: HashMap<String, DataAdd> = HashMap::new();
+        let mut expected_updates: HashMap<String, DataUpdate> = HashMap::new();
+        let mut expected_dels: HashMap<String, DataDelete> = HashMap::new();
 
         for entry in &to_add {
             to_diff = to_diff.add(&entry.0, entry.1, None)?;
@@ -1638,6 +1635,81 @@ mod tests {
         assert_eq!(diff.updates, expected_updates);
         assert_eq!(diff.deletes, expected_dels);
 
+        // ensure we correctly report all added CIDs
+        for mut entry in to_diff.walk() {
+            let cid: Cid = match entry {
+                NodeEntry::MST(ref mut entry) => entry.get_pointer()?,
+                NodeEntry::Leaf(ref entry) => entry.value.clone(),
+            };
+            let found = mst.storage.blocks.has(cid)
+                || diff.new_mst_blocks.has(cid)
+                || diff.new_leaf_cids.has(cid);
+            assert!(found)
+        }
+
+        Ok(())
+    }
+
+    /// computes "simple" tree root CID
+    #[test]
+    fn simple_tree_diffs() -> Result<()> {
+        let cid1 = Cid::try_from("bafyreie5cvv4h45feadgeuwhbcutmh6t2ceseocckahdoe6uat64zmz454")?;
+        let storage = SqlRepoReader::new(None, "did:example:123456789abcdefghi".to_string(), None);
+        let mut mst = MST::create(storage, None, None)?;
+
+        let mut mst = mst.add(&"com.example.record/3jqfcqzm3fp2j".to_string(), cid1, None)?; // level 0
+        let mut mst = mst.add(&"com.example.record/3jqfcqzm3fr2j".to_string(), cid1, None)?; // level 0
+        let mut mst = mst.add(&"com.example.record/3jqfcqzm3fs2j".to_string(), cid1, None)?; // level 1
+        let mut to_diff = mst.clone();
+        let mut expected_adds: HashMap<String, DataAdd> = HashMap::new();
+        let mut expected_updates: HashMap<String, DataUpdate> = HashMap::new();
+        let mut expected_dels: HashMap<String, DataDelete> = HashMap::new();
+
+        to_diff = to_diff.add(&"com.example.record/3jqfcqzm3ft2j".to_string(), cid1, None)?; // level 0
+        expected_adds.insert(
+            "com.example.record/3jqfcqzm3ft2j".to_string(),
+            DataAdd {
+                key: "com.example.record/3jqfcqzm3ft2j".to_string(),
+                cid: cid1,
+            },
+        );
+        to_diff = to_diff.add(&"com.example.record/3jqfcqzm4fc2j".to_string(), cid1, None)?; // level 0
+        expected_adds.insert(
+            "com.example.record/3jqfcqzm4fc2j".to_string(),
+            DataAdd {
+                key: "com.example.record/3jqfcqzm4fc2j".to_string(),
+                cid: cid1,
+            },
+        );
+        let updated = random_cid(&mut None)?;
+        to_diff = to_diff.update(&"com.example.record/3jqfcqzm3fs2j", updated)?;
+        expected_updates.insert(
+            "com.example.record/3jqfcqzm3fs2j".to_string(),
+            DataUpdate {
+                key: "com.example.record/3jqfcqzm3fs2j".to_string(),
+                prev: cid1,
+                cid: updated,
+            },
+        );
+
+        to_diff = to_diff.delete(&"com.example.record/3jqfcqzm3fr2j".to_string())?;
+        expected_dels.insert(
+            "com.example.record/3jqfcqzm3fr2j".to_string(),
+            DataDelete {
+                key: "com.example.record/3jqfcqzm3fr2j".to_string(),
+                cid: cid1,
+            },
+        );
+
+        let diff = DataDiff::of(&mut to_diff, Some(&mut mst))?;
+        assert_eq!(diff.add_list().len(), 2);
+        assert_eq!(diff.update_list().len(), 1);
+        assert_eq!(diff.delete_list().len(), 1);
+
+        assert_eq!(diff.adds, expected_adds);
+        assert_eq!(diff.updates, expected_updates);
+        assert_eq!(diff.deletes, expected_dels);
+
         // ensure we correctly report all added CIDs
         let mut blockstore = mst.storage.clone();
         for mut entry in to_diff.walk() {
@@ -1651,7 +1723,7 @@ mod tests {
         }
 
         Ok(())
-    } */
+    }
 
     #[test]
     fn test_leading_zeros() -> Result<()> {

rsky-pds/src/repo/mst/walker.rs

@@ -86,17 +86,17 @@ impl MstWalker {
 
     /// step into a subtree, throws if currently pointed at a leaf
     pub fn step_into(&mut self) -> Result<()> {
+        let clone_of_current_status = self.status.clone();
         match self.status {
             WalkerStatus::WalkerStatusDone(_) => return Ok(()),
             WalkerStatus::WalkerStatusProgress(ref mut p) => {
                 if let Some(_) = p.walking {
                     if let NodeEntry::MST(ref mut curr) = p.curr {
                         let next = curr.at_index(0)?;
                         if let Some(next) = next {
-                            p.walking = Some(curr.clone());
-                            self.stack
-                                .push(WalkerStatus::WalkerStatusProgress(p.clone()));
-                            p.curr = next.clone();
+                            self.stack.push(clone_of_current_status);
+                            p.walking = Some(curr.clone()); // Changes walking to be parent tree
+                            p.curr = next.clone(); // Changes current to be this node
                             p.index = 0;
                         } else {
                             bail!("Tried to step into a node with 0 entries which is invalid");