Add iteration suffix stripping node

tests/test_dumas_json_nodes.py

@@ -17,6 +17,7 @@ from dumas_json_nodes import (
     DumasJSONObjectToStringNode,
     DumasJSONStringToObjectNode,
     DumasJSONSetValueNode,
+    DumasStripIterationSuffixNode,
 )
 
 class DumasJSONNodeTests(unittest.TestCase):
@@ -41,6 +42,27 @@ class DumasJSONNodeTests(unittest.TestCase):
 
         self.assertEqual(result, ('{\n  "a": 2,\n  "b": 1\n}',))
 
+    def test_strip_iteration_suffix_removes_trailing_iteration_before_extension(self):
+        node = DumasStripIterationSuffixNode()
+
+        result = node.strip_iteration_suffix("asset_build_003.png")
+
+        self.assertEqual(result, ("asset_build.png",))
+
+    def test_strip_iteration_suffix_removes_trailing_iteration_without_extension(self):
+        node = DumasStripIterationSuffixNode()
+
+        result = node.strip_iteration_suffix("asset_build_003")
+
+        self.assertEqual(result, ("asset_build",))
+
+    def test_strip_iteration_suffix_leaves_names_without_numeric_suffix_unchanged(self):
+        node = DumasStripIterationSuffixNode()
+
+        result = node.strip_iteration_suffix("my_asset_final.png")
+
+        self.assertEqual(result, ("my_asset_final.png",))
+
     def test_get_value_reads_nested_paths(self):
         node = DumasJSONGetValueNode()