code: def testRunCreate(self):
      self._prepare_airflow_with_mysql()
      # Try running a non-existent pipeline.
      result = self.runner.invoke(
          cli_group,
          [
              "run",
              "create",
              "--engine",
              "airflow",
              "--pipeline_name",
              self._pipeline_name,
          ],
      )
      self.assertIn(
          "Creating a run for pipeline: {}".format(self._pipeline_name),
          result.output,
      )
      self.assertIn(
          'Pipeline "{}" does not exist.'.format(self._pipeline_name),
          result.output,
      )
  
      # Now create a pipeline.
      self._valid_create_and_check(
          self._pipeline_path, self._pipeline_name
      )
  
      # Run pipeline.
      self._valid_run_and_check(self._pipeline_name)
  
imports: import codecs
  import locale
  import os
  import subprocess
  import sys
  import time
  import absl
  from click import testing
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.orchestration.airflow import test_utils
  from tfx.tools.cli import labels
  from tfx.tools.cli import pip_utils
  from tfx.tools.cli.cli_main import cli_group
  from tfx.tools.cli.e2e import test_utils
  from tfx.utils import io_utils
  from tfx.utils import retry
  from tfx.utils import test_case_utils
label_desc: Use image node_id 15 for calling the CliAirflowEndToEndTest obj's underlying member method code with example usage: obj.testRunCreate() without return types