text: from __future__ import print_function
  import os
  import sys
  
  try:
      import IDF
  except ImportError:
      test_fw_path = os.getenv('TEST_FW_PATH')
      if test_fw_path and test_fw_path not in sys.path:
          sys.path.insert(0, test_fw_path)
      import IDF
  
  
  # To prepare a test runner for this example:
  # 1. Generate zero flash encryption key:
  #   dd if=/dev/zero of=key.bin bs=1 count=32
  # 2.Burn Efuses:
  #   espefuse.py --do-not-confirm -p $ESPPORT burn_efuse FLASH_CRYPT_CONFIG 0xf
  #   espefuse.py --do-not-confirm -p $ESPPORT burn_efuse FLASH_CRYPT_CNT 0x1
  #   espefuse.py --do-not-confirm -p $ESPPORT burn_key flash_encryption key.bin
  @IDF.idf_example_test(env_tag='Example_Flash_Encryption')
  def test_examples_security_flash_encryption(env, extra_data):
      dut = env.get_dut('flash_encryption', 'examples/security/flash_encryption')
      # start test
      dut.start_app()
      lines = [
          'FLASH_CRYPT_CNT eFuse value is 1',
          'Flash encryption feature is enabled in DEVELOPMENT mode',
          'with esp_partition_write',
          '00 01 02 03 04 05 06 07  08 09 0a 0b 0c 0d 0e 0f',
          'with esp_partition_read',
          '00 01 02 03 04 05 06 07  08 09 0a 0b 0c 0d 0e 0f',
          'with spi_flash_read',
          '29 68 2e 13 88 a0 5b 7f  cc 6b 39 f9 d7 7b 32 2f'
      ]
      for line in lines:
          dut.expect(line, timeout=2)
  
  
  if __name__ == '__main__':
      test_examples_security_flash_encryption()
  