83 lines
3.0 KiB
Python
83 lines
3.0 KiB
Python
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"""Test cases for graph processing code in build.py."""
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import sys
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from typing import AbstractSet, Dict, Set, List
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from mypy.test.helpers import assert_equal, Suite
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from mypy.build import BuildManager, State, BuildSourceSet
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from mypy.modulefinder import SearchPaths
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from mypy.build import topsort, strongly_connected_components, sorted_components, order_ascc
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from mypy.version import __version__
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from mypy.options import Options
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from mypy.report import Reports
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from mypy.plugin import Plugin
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from mypy.errors import Errors
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from mypy.fscache import FileSystemCache
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class GraphSuite(Suite):
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def test_topsort(self) -> None:
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a = frozenset({'A'})
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b = frozenset({'B'})
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c = frozenset({'C'})
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d = frozenset({'D'})
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data: Dict[AbstractSet[str], Set[AbstractSet[str]]] = {a: {b, c}, b: {d}, c: {d}}
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res = list(topsort(data))
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assert_equal(res, [{d}, {b, c}, {a}])
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def test_scc(self) -> None:
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vertices = {"A", "B", "C", "D"}
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edges: Dict[str, List[str]] = {"A": ["B", "C"], "B": ["C"], "C": ["B", "D"], "D": []}
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sccs = {frozenset(x) for x in strongly_connected_components(vertices, edges)}
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assert_equal(sccs,
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{frozenset({'A'}),
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frozenset({'B', 'C'}),
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frozenset({'D'})})
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def _make_manager(self) -> BuildManager:
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errors = Errors()
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options = Options()
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fscache = FileSystemCache()
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search_paths = SearchPaths((), (), (), ())
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manager = BuildManager(
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data_dir='',
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search_paths=search_paths,
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ignore_prefix='',
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source_set=BuildSourceSet([]),
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reports=Reports('', {}),
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options=options,
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version_id=__version__,
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plugin=Plugin(options),
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plugins_snapshot={},
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errors=errors,
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flush_errors=lambda msgs, serious: None,
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fscache=fscache,
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stdout=sys.stdout,
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stderr=sys.stderr,
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)
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return manager
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def test_sorted_components(self) -> None:
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manager = self._make_manager()
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graph = {'a': State('a', None, 'import b, c', manager),
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'd': State('d', None, 'pass', manager),
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'b': State('b', None, 'import c', manager),
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'c': State('c', None, 'import b, d', manager),
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}
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res = sorted_components(graph)
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assert_equal(res, [frozenset({'d'}), frozenset({'c', 'b'}), frozenset({'a'})])
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def test_order_ascc(self) -> None:
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manager = self._make_manager()
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graph = {'a': State('a', None, 'import b, c', manager),
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'd': State('d', None, 'def f(): import a', manager),
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'b': State('b', None, 'import c', manager),
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'c': State('c', None, 'import b, d', manager),
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}
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res = sorted_components(graph)
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assert_equal(res, [frozenset({'a', 'd', 'c', 'b'})])
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ascc = res[0]
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scc = order_ascc(graph, ascc)
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assert_equal(scc, ['d', 'c', 'b', 'a'])
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