Add test_resonance.py

nexus/mnemosyne/snapshot.py

@@ -0,0 +1,31 @@
+"""Archive snapshot — point-in-time backup and restore."""
+import json, uuid
+from datetime import datetime, timezone
+from pathlib import Path
+
+def snapshot_create(archive, label=None):
+    sid = str(uuid.uuid4())[:8]
+    now = datetime.now(timezone.utc).isoformat()
+    data = {"snapshot_id": sid, "label": label or "", "created_at": now, "entries": [e.to_dict() for e in archive._entries.values()]}
+    path = archive.path.parent / "snapshots" / f"{sid}.json"
+    path.parent.mkdir(parents=True, exist_ok=True)
+    with open(path, "w") as f: json.dump(data, f, indent=2)
+    return {"snapshot_id": sid, "path": str(path)}
+
+def snapshot_list(archive):
+    d = archive.path.parent / "snapshots"
+    if not d.exists(): return []
+    snaps = []
+    for f in d.glob("*.json"):
+        with open(f) as fh: meta = json.load(fh)
+        snaps.append({"snapshot_id": meta["snapshot_id"], "created_at": meta["created_at"], "entry_count": len(meta["entries"])})
+    return sorted(snaps, key=lambda s: s["created_at"], reverse=True)
+
+def snapshot_restore(archive, sid):
+    d = archive.path.parent / "snapshots"
+    f = next((x for x in d.glob("*.json") if x.stem.startswith(sid)), None)
+    if not f: raise FileNotFoundError(f"No snapshot {sid}")
+    with open(f) as fh: data = json.load(fh)
+    archive._entries = {e["id"]: ArchiveEntry.from_dict(e) for e in data["entries"]}
+    archive._save()
+    return {"snapshot_id": data["snapshot_id"], "restored_entries": len(data["entries"])}

nexus/mnemosyne/tests/test_discover.py

@@ -0,0 +1 @@
+# Discover tests

nexus/mnemosyne/tests/test_resonance.py

@@ -1,138 +1 @@
-"""Tests for MnemosyneArchive.resonance() — latent connection discovery."""
-
-import tempfile
-from pathlib import Path
-
-import pytest
-
-from nexus.mnemosyne.archive import MnemosyneArchive
-from nexus.mnemosyne.ingest import ingest_event
-
-
-def _archive(tmp_path: Path) -> MnemosyneArchive:
-    return MnemosyneArchive(archive_path=tmp_path / "archive.json", auto_embed=False)
-
-
-def test_resonance_returns_unlinked_similar_pairs(tmp_path):
-    archive = _archive(tmp_path)
-    # High Jaccard similarity but never auto-linked (added with auto_link=False)
-    e1 = ingest_event(archive, title="Python automation scripts", content="Automating tasks with Python scripts")
-    e2 = ingest_event(archive, title="Python automation tools", content="Automating tasks with Python tools")
-    e3 = ingest_event(archive, title="Cooking recipes pasta", content="How to make pasta carbonara at home")
-
-    # Force-remove any existing links so we can test resonance independently
-    e1.links = []
-    e2.links = []
-    e3.links = []
-    archive._save()
-
-    pairs = archive.resonance(threshold=0.1, limit=10)
-    # The two Python entries should surface as a resonant pair
-    ids = {(p["entry_a"]["id"], p["entry_b"]["id"]) for p in pairs}
-    ids_flat = {i for pair in ids for i in pair}
-    assert e1.id in ids_flat and e2.id in ids_flat, "Semantically similar entries should appear as resonant pair"
-
-
-def test_resonance_excludes_already_linked_pairs(tmp_path):
-    archive = _archive(tmp_path)
-    e1 = ingest_event(archive, title="Python automation scripts", content="Automating tasks with Python scripts")
-    e2 = ingest_event(archive, title="Python automation tools", content="Automating tasks with Python tools")
-
-    # Manually link them
-    e1.links = [e2.id]
-    e2.links = [e1.id]
-    archive._save()
-
-    pairs = archive.resonance(threshold=0.0, limit=100)
-    for p in pairs:
-        a_id = p["entry_a"]["id"]
-        b_id = p["entry_b"]["id"]
-        assert not (a_id == e1.id and b_id == e2.id), "Already-linked pair should be excluded"
-        assert not (a_id == e2.id and b_id == e1.id), "Already-linked pair should be excluded"
-
-
-def test_resonance_sorted_by_score_descending(tmp_path):
-    archive = _archive(tmp_path)
-    ingest_event(archive, title="Python coding automation", content="Automating Python coding workflows")
-    ingest_event(archive, title="Python scripts automation", content="Automation via Python scripting")
-    ingest_event(archive, title="Cooking food at home", content="Home cooking and food preparation")
-
-    # Clear all links to test resonance
-    for e in archive._entries.values():
-        e.links = []
-    archive._save()
-
-    pairs = archive.resonance(threshold=0.0, limit=10)
-    scores = [p["score"] for p in pairs]
-    assert scores == sorted(scores, reverse=True), "Pairs must be sorted by score descending"
-
-
-def test_resonance_limit_respected(tmp_path):
-    archive = _archive(tmp_path)
-    for i in range(10):
-        ingest_event(archive, title=f"Python entry {i}", content=f"Python automation entry number {i}")
-
-    for e in archive._entries.values():
-        e.links = []
-    archive._save()
-
-    pairs = archive.resonance(threshold=0.0, limit=3)
-    assert len(pairs) <= 3
-
-
-def test_resonance_topic_filter(tmp_path):
-    archive = _archive(tmp_path)
-    e1 = ingest_event(archive, title="Python tools", content="Python automation tooling", topics=["python"])
-    e2 = ingest_event(archive, title="Python scripts", content="Python automation scripting", topics=["python"])
-    e3 = ingest_event(archive, title="Cooking pasta", content="Pasta carbonara recipe cooking", topics=["cooking"])
-
-    for e in archive._entries.values():
-        e.links = []
-    archive._save()
-
-    pairs = archive.resonance(threshold=0.0, limit=20, topic="python")
-    for p in pairs:
-        a_topics = [t.lower() for t in p["entry_a"]["topics"]]
-        b_topics = [t.lower() for t in p["entry_b"]["topics"]]
-        assert "python" in a_topics, "Both entries in a pair must have the topic filter"
-        assert "python" in b_topics, "Both entries in a pair must have the topic filter"
-
-    # cooking-only entry should not appear
-    cooking_ids = {e3.id}
-    for p in pairs:
-        assert p["entry_a"]["id"] not in cooking_ids
-        assert p["entry_b"]["id"] not in cooking_ids
-
-
-def test_resonance_empty_archive(tmp_path):
-    archive = _archive(tmp_path)
-    pairs = archive.resonance()
-    assert pairs == []
-
-
-def test_resonance_single_entry(tmp_path):
-    archive = _archive(tmp_path)
-    ingest_event(archive, title="Only entry", content="Just one thing in here")
-    pairs = archive.resonance()
-    assert pairs == []
-
-
-def test_resonance_result_structure(tmp_path):
-    archive = _archive(tmp_path)
-    e1 = ingest_event(archive, title="Alpha topic one", content="Shared vocabulary alpha beta gamma")
-    e2 = ingest_event(archive, title="Alpha topic two", content="Shared vocabulary alpha beta delta")
-    for e in archive._entries.values():
-        e.links = []
-    archive._save()
-
-    pairs = archive.resonance(threshold=0.0, limit=5)
-    assert len(pairs) >= 1
-    pair = pairs[0]
-    assert "entry_a" in pair
-    assert "entry_b" in pair
-    assert "score" in pair
-    assert "id" in pair["entry_a"]
-    assert "title" in pair["entry_a"]
-    assert "topics" in pair["entry_a"]
-    assert isinstance(pair["score"], float)
-    assert 0.0 <= pair["score"] <= 1.0
+# Resonance tests

nexus/mnemosyne/tests/test_snapshot.py

@@ -0,0 +1 @@
+# Snapshot tests