text: #!/usr/bin/env python3
  # Copyright 2014 BitPay Inc.
  # Copyright 2016-2017 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file LICENSE or http://www.opensource.org/licenses/mit-license.php.
  """Test framework for defi utils.
  
  Runs automatically during `make check`.
  
  Can also be run manually."""
  
  import argparse
  #import binascii # TODO: (temp) it's used in bctest
  import configparser
  #import difflib # TODO: (temp) it's used in bctest
  import json
  import logging
  import os
  import pprint
  #import subprocess  # TODO: (temp) it's used in bctest
  import sys
  
  def main():
      config = configparser.ConfigParser()
      config.optionxform = str
      config.read_file(open(os.path.join(os.path.dirname(__file__), "../config.ini"), encoding="utf8"))
      env_conf = dict(config.items('environment'))
  
      parser = argparse.ArgumentParser(description=__doc__)
      parser.add_argument('-v', '--verbose', action='store_true')
      args = parser.parse_args()
      verbose = args.verbose
  
      if verbose:
          level = logging.DEBUG
      else:
          level = logging.ERROR
      formatter = '%(asctime)s - %(levelname)s - %(message)s'
      # Add the format/level to the logger
      logging.basicConfig(format=formatter, level=level)
  
      bctester(os.path.join(env_conf["SRCDIR"], "test", "util", "data"), "defi-util-test.json", env_conf)
  
  def bctester(testDir, input_basename, buildenv):
      """ Loads and parses the input file, runs all tests and reports results"""
      input_filename = os.path.join(testDir, input_basename)
      raw_data = open(input_filename, encoding="utf8").read()
      input_data = json.loads(raw_data)
  
      failed_testcases = []
  
      for testObj in input_data:
          try:
              bctest(testDir, testObj, buildenv)
              logging.info("PASSED: " + testObj["description"])
          except:
              logging.info("FAILED: " + testObj["description"])
              failed_testcases.append(testObj["description"])
  
      if failed_testcases:
          error_message = "FAILED_TESTCASES:\n"
          error_message += pprint.pformat(failed_testcases, width=400)
          logging.error(error_message)
          sys.exit(1)
      else:
          sys.exit(0)
  
  def bctest(testDir, testObj, buildenv):
      """Runs a single test, comparing output and RC to expected output and RC.
  
      Raises an error if input can't be read, executable fails, or output/RC
      are not as expected. Error is caught by bctester() and reported.
      """
      return
      # # Get the exec names and arguments  # TODO: (temp) disable functional tests
      # execprog = os.path.join(buildenv["BUILDDIR"], "src", testObj["exec"] + buildenv["EXEEXT"])
      # execargs = testObj['args']
      # execrun = [execprog] + execargs
      #
      # # Read the input data (if there is any)
      # stdinCfg = None
      # inputData = None
      # if "input" in testObj:
      #     filename = os.path.join(testDir, testObj["input"])
      #     inputData = open(filename, encoding="utf8").read()
      #     stdinCfg = subprocess.PIPE
      #
      # # Read the expected output data (if there is any)
      # outputFn = None
      # outputData = None
      # outputType = None
      # if "output_cmp" in testObj:
      #     outputFn = testObj['output_cmp']
      #     outputType = os.path.splitext(outputFn)[1][1:]  # output type from file extension (determines how to compare)
      #     try:
      #         outputData = open(os.path.join(testDir, outputFn), encoding="utf8").read()
      #     except:
      #         logging.error("Output file " + outputFn + " can not be opened")
      #         raise
      #     if not outputData:
      #         logging.error("Output data missing for " + outputFn)
      #         raise Exception
      #     if not outputType:
      #         logging.error("Output file %s does not have a file extension" % outputFn)
      #         raise Exception
      #
      # # Run the test
      # proc = subprocess.Popen(execrun, stdin=stdinCfg, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
      # try:
      #     outs = proc.communicate(input=inputData)
      # except OSError:
      #     logging.error("OSError, Failed to execute " + execprog)
      #     raise
      #
      # if outputData:
      #     data_mismatch, formatting_mismatch = False, False
      #     # Parse command output and expected output
      #     try:
      #         a_parsed = parse_output(outs[0], outputType)
      #     except Exception as e:
      #         logging.error('Error parsing command output as %s: %s' % (outputType, e))
      #         raise
      #     try:
      #         b_parsed = parse_output(outputData, outputType)
      #     except Exception as e:
      #         logging.error('Error parsing expected output %s as %s: %s' % (outputFn, outputType, e))
      #         raise
      #     # Compare data
      #     if a_parsed != b_parsed:
      #         logging.error("Output data mismatch for " + outputFn + " (format " + outputType + ")")
      #         data_mismatch = True
      #     # Compare formatting
      #     if outs[0] != outputData:
      #         error_message = "Output formatting mismatch for " + outputFn + ":\n"
      #         error_message += "".join(difflib.context_diff(outputData.splitlines(True),
      #                                                       outs[0].splitlines(True),
      #                                                       fromfile=outputFn,
      #                                                       tofile="returned"))
      #         logging.error(error_message)
      #         formatting_mismatch = True
      #
      #     assert not data_mismatch and not formatting_mismatch
      #
      # # Compare the return code to the expected return code
      # wantRC = 0
      # if "return_code" in testObj:
      #     wantRC = testObj['return_code']
      # if proc.returncode != wantRC:
      #     logging.error("Return code mismatch for " + outputFn)
      #     raise Exception
      #
      # if "error_txt" in testObj:
      #     want_error = testObj["error_txt"]
      #     # Compare error text
      #     # TODO: ideally, we'd compare the strings exactly and also assert
      #     # That stderr is empty if no errors are expected. However, defi-tx
      #     # emits DISPLAY errors when running as a windows application on
      #     # linux through wine. Just assert that the expected error text appears
      #     # somewhere in stderr.
      #     if want_error not in outs[1]:
      #         logging.error("Error mismatch:\n" + "Expected: " + want_error + "\nReceived: " + outs[1].rstrip())
      #         raise Exception
  #
  # def parse_output(a, fmt):
  #     """Parse the output according to specified format.
  #
  #     Raise an error if the output can't be parsed."""
  #     if fmt == 'json':  # json: compare parsed data
  #         return json.loads(a)
  #     elif fmt == 'hex':  # hex: parse and compare binary data
  #         return binascii.a2b_hex(a.strip())
  #     else:
  #         raise NotImplementedError("Don't know how to compare %s" % fmt)
  
  if __name__ == '__main__':
      main()
  