only validate the new entry in add_history_entry

asdf/_asdf.py

@@ -1095,31 +1095,25 @@ def add_history_entry(self, description, software=None):
         if software is not None:
             entry["software"] = software
 
+        # validate the history entry
+        schema.validate(
+            yamlutil.custom_tree_to_tagged_tree({"entry": entry}, self),
+            ctx=self,
+        )
+
         if self.version >= versioning.NEW_HISTORY_FORMAT_MIN_VERSION:
             if "history" not in self.tree:
                 self.tree["history"] = {"entries": []}
             elif "entries" not in self.tree["history"]:
                 self.tree["history"]["entries"] = []
 
             self.tree["history"]["entries"].append(entry)
-
-            try:
-                self.validate()
-            except Exception:
-                self.tree["history"]["entries"].pop()
-                raise
         else:
             if "history" not in self.tree:
                 self.tree["history"] = []
 
             self.tree["history"].append(entry)
 
-            try:
-                self.validate()
-            except Exception:
-                self.tree["history"].pop()
-                raise
-
     def get_history_entries(self):
         """
         Get a list of history entries from the file object.

asdf/_tests/test_history.py

@@ -273,3 +273,23 @@ class FractionExtension(Extension):
 
         with asdf.open(file_path_3) as af:
             assert len(af["history"]["extensions"]) == 2
+
+
+def test_history_validate():
+    """
+    Test that add_history_entry validates the generated entry and doesn't
+    add the entry to the history list if invalid.
+    """
+    af = asdf.AsdfFile(version="1.6.0")
+    # add an invalid item to the tree to check if adding a history entry validates
+    # the entire tree
+    af["invalid"] = asdf.tagged.TaggedDict({}, tag="tag:stsci.edu:asdf/core/ndarray-1.1.0")
+    with pytest.raises(ValidationError):
+        af.validate()
+
+    af.add_history_entry("test")
+    assert af.get_history_entries()[0]["description"] == "test"
+
+    with pytest.raises(ValidationError):
+        af.add_history_entry(1)
+    assert len(af.get_history_entries()) == 1

changes/2029.bugfix.rst

@@ -0,0 +1 @@
+Remove whole-tree validation in ``AsdfFile.add_history_entry`` and replace it with validation of the newly created entry.