test: add test cases for YAML block scalar with inconsistent and insufficient indentation

tests/unittest/test_try_fix_yaml.py

@@ -139,3 +139,82 @@ code_suggestions:
             'improved_code': 'const router = createBrowserRouter([\n'
         }]}
         assert try_fix_yaml(review_text, first_key='code_suggestions', last_key='improved_code') == expected_output
+
+
+    def test_inconsistent_indentation_in_block_scalar_yaml(self):
+        """
+            This test case represents a situation where the AI outputs the opening '{' with 5 spaces
+            (resulting in an inferred indent level of 5), while the closing '}' is output with only 4 spaces.
+            This inconsistency makes it impossible for the YAML parser to automatically determine the correct
+            indent level, causing a parsing failure.
+
+            The root cause may be the LLM miscounting spaces or misunderstanding the active block scalar context
+            while generating YAML output.
+        """
+
+        review_text = '''\
+code_suggestions:
+- relevant_file: |
+    tsconfig.json
+  existing_code: |
+     {
+        "key1": "value1",
+        "key2": {
+          "subkey": "value"
+         }
+    }
+'''
+        expected_json = '''\
+ {
+    "key1": "value1",
+    "key2": {
+      "subkey": "value"
+     }
+}
+'''
+        expected_output = {
+            'code_suggestions': [{
+                'relevant_file': 'tsconfig.json\n',
+                'existing_code': expected_json
+            }]
+        }
+        assert try_fix_yaml(review_text, first_key='code_suggestions', last_key='existing_code') == expected_output
+
+
+    def test_inconsistent_and_insufficient_indentation_in_block_scalar_yaml(self):
+        """
+            This test case reproduces a YAML parsing failure where the block scalar content
+            generated by the AI includes inconsistent and insufficient indentation levels.
+
+            The root cause may be the LLM miscounting spaces or misunderstanding the active block scalar context
+            while generating YAML output.
+        """
+
+        review_text = '''\
+code_suggestions:
+- relevant_file: |
+    tsconfig.json
+  existing_code: |
+    {
+      "key1": "value1",
+      "key2": {
+        "subkey": "value"
+      }
+  }
+'''
+        expected_json = '''\
+{
+  "key1": "value1",
+  "key2": {
+    "subkey": "value"
+  }
+}
+'''
+        expected_output = {
+            'code_suggestions': [{
+                'relevant_file': 'tsconfig.json\n',
+                'existing_code': expected_json
+            }]
+        }
+        assert try_fix_yaml(review_text, first_key='code_suggestions', last_key='existing_code') == expected_output
+