Initial commit

tests/test_format_diff.py

@@ -0,0 +1,25 @@
+from kanta import format_diff
+
+
+def test_add():
+    lines = format_diff({"name": "Alice"}, previous={})
+    assert any("name" in line for line in lines)
+
+
+def test_update():
+    lines = format_diff({"name": "Bob"}, previous={"name": "Alice"})
+    assert any("Bob" in line for line in lines)
+
+
+def test_delete():
+    lines = format_diff({"$delete": ["old_key"]}, previous={"old_key": 1})
+    assert any("old_key" in line for line in lines)
+
+
+def test_resolver():
+    lines = format_diff(
+        {"users": {"uuid-1": {"name": "Alice"}}},
+        previous={},
+        resolver=lambda x: "Alice" if x == "uuid-1" else x,
+    )
+    assert any("Alice" in line for line in lines)