66 lines
2.4 KiB
Python
66 lines
2.4 KiB
Python
"""Test cases for AST diff (used for fine-grained incremental checking)"""
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import os
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from typing import List, Tuple, Dict, Optional
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from mypy import build
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from mypy.modulefinder import BuildSource
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from mypy.defaults import PYTHON3_VERSION
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from mypy.errors import CompileError
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from mypy.nodes import MypyFile
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from mypy.options import Options
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from mypy.server.astdiff import snapshot_symbol_table, compare_symbol_table_snapshots
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from mypy.test.config import test_temp_dir
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from mypy.test.data import DataDrivenTestCase, DataSuite
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from mypy.test.helpers import assert_string_arrays_equal, parse_options
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class ASTDiffSuite(DataSuite):
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files = [
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'diff.test',
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]
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def run_case(self, testcase: DataDrivenTestCase) -> None:
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first_src = '\n'.join(testcase.input)
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files_dict = dict(testcase.files)
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second_src = files_dict['tmp/next.py']
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options = parse_options(first_src, testcase, 1)
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messages1, files1 = self.build(first_src, options)
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messages2, files2 = self.build(second_src, options)
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a = []
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if messages1:
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a.extend(messages1)
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if messages2:
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a.append('== next ==')
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a.extend(messages2)
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assert files1 is not None and files2 is not None, ('cases where CompileError'
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' occurred should not be run')
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prefix = '__main__'
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snapshot1 = snapshot_symbol_table(prefix, files1['__main__'].names)
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snapshot2 = snapshot_symbol_table(prefix, files2['__main__'].names)
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diff = compare_symbol_table_snapshots(prefix, snapshot1, snapshot2)
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for trigger in sorted(diff):
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a.append(trigger)
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assert_string_arrays_equal(
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testcase.output, a,
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f'Invalid output ({testcase.file}, line {testcase.line})')
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def build(self, source: str,
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options: Options) -> Tuple[List[str], Optional[Dict[str, MypyFile]]]:
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options.use_builtins_fixtures = True
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options.show_traceback = True
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options.cache_dir = os.devnull
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options.python_version = PYTHON3_VERSION
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try:
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result = build.build(sources=[BuildSource('main', None, source)],
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options=options,
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alt_lib_path=test_temp_dir)
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except CompileError as e:
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# TODO: Is it okay to return None?
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return e.messages, None
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return result.errors, result.files
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