Expand secondary AST import-helper edge-case contract coverage

Co-authored-by: Shri Sukhani <shrisukhani@users.noreply.github.com>

Author: cursoragent

tests/test_ast_import_utils.py

@@ -60,3 +60,21 @@ def test_imports_imports_collect_function_sources_ignores_non_matching_imports()
     )
 
     assert imports_imports_collect_function_sources(module_text) is False
+
+
+def test_imports_imports_collect_function_sources_supports_aliased_import():
+    module_text = (
+        "from tests.ast_import_utils import imports_collect_function_sources as helper\n"
+        "helper('dummy')\n"
+    )
+
+    assert imports_imports_collect_function_sources(module_text) is True
+
+
+def test_imports_imports_collect_function_sources_ignores_non_from_imports():
+    module_text = (
+        "import tests.ast_import_utils as import_utils\n"
+        "import_utils.imports_collect_function_sources('dummy')\n"
+    )
+
+    assert imports_imports_collect_function_sources(module_text) is False