#!/usr/bin/env python3 """Sanity checks for test data. This program contains a class for traversing test cases that can be used independently of the checks. """ # Copyright (C) 2019, Arm Limited, All Rights Reserved # SPDX-License-Identifier: Apache-2.0 # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # # This file is part of Mbed TLS (https://tls.mbed.org) import argparse import glob import os import re import sys class Results: """Store file and line information about errors or warnings in test suites.""" def __init__(self, options): self.errors = 0 self.warnings = 0 self.ignore_warnings = options.quiet def error(self, file_name, line_number, fmt, *args): sys.stderr.write(('{}:{}:ERROR:' + fmt + '\n'). format(file_name, line_number, *args)) self.errors += 1 def warning(self, file_name, line_number, fmt, *args): if not self.ignore_warnings: sys.stderr.write(('{}:{}:Warning:' + fmt + '\n') .format(file_name, line_number, *args)) self.warnings += 1 class TestDescriptionExplorer: """An iterator over test cases with descriptions. The test cases that have descriptions are: * Individual unit tests (entries in a .data file) in test suites. * Individual test cases in ssl-opt.sh. This is an abstract class. To use it, derive a class that implements the process_test_case method, and call walk_all(). """ def process_test_case(self, per_file_state, file_name, line_number, description): """Process a test case. per_file_state: an object created by new_per_file_state() at the beginning of each file. file_name: a relative path to the file containing the test case. line_number: the line number in the given file. description: the test case description as a byte string. """ raise NotImplementedError def new_per_file_state(self): """Return a new per-file state object. The default per-file state object is None. Child classes that require per-file state may override this method. """ #pylint: disable=no-self-use return None def walk_test_suite(self, data_file_name): """Iterate over the test cases in the given unit test data file.""" in_paragraph = False descriptions = self.new_per_file_state() # pylint: disable=assignment-from-none with open(data_file_name, 'rb') as data_file: for line_number, line in enumerate(data_file, 1): line = line.rstrip(b'\r\n') if not line: in_paragraph = False continue if line.startswith(b'#'): continue if not in_paragraph: # This is a test case description line. self.process_test_case(descriptions, data_file_name, line_number, line) in_paragraph = True def walk_ssl_opt_sh(self, file_name): """Iterate over the test cases in ssl-opt.sh or a file with a similar format.""" descriptions = self.new_per_file_state() # pylint: disable=assignment-from-none with open(file_name, 'rb') as file_contents: for line_number, line in enumerate(file_contents, 1): # Assume that all run_test calls have the same simple form # with the test description entirely on the same line as the # function name. m = re.match(br'\s*run_test\s+"((?:[^\\"]|\\.)*)"', line) if not m: continue description = m.group(1) self.process_test_case(descriptions, file_name, line_number, description) @staticmethod def collect_test_directories(): """Get the relative path for the TLS and Crypto test directories.""" if os.path.isdir('tests'): tests_dir = 'tests' elif os.path.isdir('suites'): tests_dir = '.' elif os.path.isdir('../suites'): tests_dir = '..' directories = [tests_dir] return directories def walk_all(self): """Iterate over all named test cases.""" test_directories = self.collect_test_directories() for directory in test_directories: for data_file_name in glob.glob(os.path.join(directory, 'suites', '*.data')): self.walk_test_suite(data_file_name) ssl_opt_sh = os.path.join(directory, 'ssl-opt.sh') if os.path.exists(ssl_opt_sh): self.walk_ssl_opt_sh(ssl_opt_sh) class DescriptionChecker(TestDescriptionExplorer): """Check all test case descriptions. * Check that each description is valid (length, allowed character set, etc.). * Check that there is no duplicated description inside of one test suite. """ def __init__(self, results): self.results = results def new_per_file_state(self): """Dictionary mapping descriptions to their line number.""" return {} def process_test_case(self, per_file_state, file_name, line_number, description): """Check test case descriptions for errors.""" results = self.results seen = per_file_state if description in seen: results.error(file_name, line_number, 'Duplicate description (also line {})', seen[description]) return if re.search(br'[\t;]', description): results.error(file_name, line_number, 'Forbidden character \'{}\' in description', re.search(br'[\t;]', description).group(0).decode('ascii')) if re.search(br'[^ -~]', description): results.error(file_name, line_number, 'Non-ASCII character in description') if len(description) > 66: results.warning(file_name, line_number, 'Test description too long ({} > 66)', len(description)) seen[description] = line_number def main(): parser = argparse.ArgumentParser(description=__doc__) parser.add_argument('--quiet', '-q', action='store_true', help='Hide warnings') parser.add_argument('--verbose', '-v', action='store_false', dest='quiet', help='Show warnings (default: on; undoes --quiet)') options = parser.parse_args() results = Results(options) checker = DescriptionChecker(results) checker.walk_all() if (results.warnings or results.errors) and not options.quiet: sys.stderr.write('{}: {} errors, {} warnings\n' .format(sys.argv[0], results.errors, results.warnings)) sys.exit(1 if results.errors else 0) if __name__ == '__main__': main()