code: def test_run_with_pattern_set_at_runtime(self):
      component = AnswerBuilder(pattern="unused pattern")
      output = component.run(
          query="test query",
          replies=["Answer: AnswerString"],
          meta=[{}],
          pattern=r"Answer: (.*)",
      )
      answers = output["answers"]
      assert len(answers) == 1
      assert answers[0].data == "AnswerString"
      assert answers[0].meta == {}
      assert answers[0].query == "test query"
      assert answers[0].documents == []
      assert isinstance(answers[0], GeneratedAnswer)
  
file_path: haystack/test/components/builders/test_answer_builder.py
imports: import logging
  import pytest
  from haystack import GeneratedAnswer, Document
  from haystack.components.builders.answer_builder import AnswerBuilder
label_desc: Use image node_id 8 for calling the TestAnswerBuilder obj's underlying member method code with example usage: obj.test_run_with_pattern_set_at_runtime() without return types