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4fbffcd144
There are type annotations that indirectly depend on the typing_extensions module (on Python 3.5-3.7: Protocol was added to the core typing module in 3.8). The typing_extensions module is not installed by default, so the code didn't run on a pristine Python installation. To avoid depending on a non-default module, make the dependency on typing_extensions optional. (It's still required to run mypy, but installing mypy takes care of providing typing_extensions.) If it isn't available, provide a substitute definition that's just good enough to get the scripts to run. Move this ugly code to its own module to avoid the temptation of spreading such ugliness all over the place. It's likely to be used in other modules anyway. Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
103 lines
3.4 KiB
Python
103 lines
3.4 KiB
Python
"""Library for generating Mbed TLS test data.
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"""
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# Copyright The Mbed TLS Contributors
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import binascii
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import os
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import sys
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from typing import Iterable, List, Optional
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from mbedtls_dev import typing_util
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def hex_string(data: bytes) -> str:
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return '"' + binascii.hexlify(data).decode('ascii') + '"'
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class MissingDescription(Exception):
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pass
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class MissingFunction(Exception):
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pass
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class TestCase:
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"""An Mbed TLS test case."""
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def __init__(self, description: Optional[str] = None):
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self.comments = [] #type: List[str]
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self.description = description #type: Optional[str]
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self.dependencies = [] #type: List[str]
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self.function = None #type: Optional[str]
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self.arguments = [] #type: List[str]
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def add_comment(self, *lines: str) -> None:
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self.comments += lines
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def set_description(self, description: str) -> None:
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self.description = description
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def set_dependencies(self, dependencies: List[str]) -> None:
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self.dependencies = dependencies
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def set_function(self, function: str) -> None:
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self.function = function
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def set_arguments(self, arguments: List[str]) -> None:
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self.arguments = arguments
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def check_completeness(self) -> None:
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if self.description is None:
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raise MissingDescription
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if self.function is None:
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raise MissingFunction
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def write(self, out: typing_util.Writable) -> None:
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"""Write the .data file paragraph for this test case.
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The output starts and ends with a single newline character. If the
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surrounding code writes lines (consisting of non-newline characters
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and a final newline), you will end up with a blank line before, but
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not after the test case.
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"""
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self.check_completeness()
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assert self.description is not None # guide mypy
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assert self.function is not None # guide mypy
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out.write('\n')
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for line in self.comments:
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out.write('# ' + line + '\n')
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out.write(self.description + '\n')
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if self.dependencies:
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out.write('depends_on:' + ':'.join(self.dependencies) + '\n')
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out.write(self.function + ':' + ':'.join(self.arguments) + '\n')
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def write_data_file(filename: str,
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test_cases: Iterable[TestCase],
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caller: Optional[str] = None) -> None:
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"""Write the test cases to the specified file.
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If the file already exists, it is overwritten.
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"""
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if caller is None:
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caller = os.path.basename(sys.argv[0])
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with open(filename, 'w') as out:
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out.write('# Automatically generated by {}. Do not edit!\n'
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.format(caller))
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for tc in test_cases:
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tc.write(out)
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out.write('\n# End of automatically generated file.\n')
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