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Update test_future.py from Cpython v3.11.2 by Masorubka1 · Pull Request #4830 · RustPython/RustPython · GitHub

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Update test_future.py from Cpython v3.11.2 #4830

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Merged
DimitrisJim merged 1 commit into from
Apr 4, 2023
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Merged

Update test_future.py from Cpython v3.11.2 #4830

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45 changes: 42 additions & 3 deletions Lib/test/test_future.py
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Original file line number Diff line number Diff line change
Expand Up @@ -191,10 +191,12 @@ def _exec_future(self, code):
scope = {}
exec(
"from __future__ import annotations\n"
+ code, {}, scope
+ code, scope
)
return scope

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_annotations(self):
eq = self.assertAnnotationEqual
eq('...')
Expand Down Expand Up @@ -303,10 +305,11 @@ def test_annotations(self):
eq("list[str]")
eq("dict[str, int]")
eq("set[str,]")
eq("tuple[()]")
eq("tuple[str, ...]")
eq("tuple[(str, *types)]")
eq("tuple[str, *types]")
eq("tuple[str, int, (str, int)]")
eq("tuple[(*int, str, str, (str, int))]")
eq("tuple[*int, str, str, (str, int)]")
eq("tuple[str, int, float, dict[str, int]]")
eq("slice[0]")
eq("slice[0:1]")
Expand All @@ -321,6 +324,21 @@ def test_annotations(self):
eq("slice[1:2, 1]")
eq("slice[1:2, 2, 3]")
eq("slice[()]")
# Note that `slice[*Ts]`, `slice[*Ts,]`, and `slice[(*Ts,)]` all have
# the same AST, but only `slice[*Ts,]` passes this test, because that's
# what the unparser produces.
eq("slice[*Ts,]")
eq("slice[1, *Ts]")
eq("slice[*Ts, 2]")
eq("slice[1, *Ts, 2]")
eq("slice[*Ts, *Ts]")
eq("slice[1, *Ts, *Ts]")
eq("slice[*Ts, 1, *Ts]")
eq("slice[*Ts, *Ts, 1]")
eq("slice[1, *Ts, *Ts, 2]")
eq("slice[1:2, *Ts]")
eq("slice[*Ts, 1:2]")
eq("slice[1:2, *Ts, 3:4]")
eq("slice[a, b:c, d:e:f]")
eq("slice[(x for x in a)]")
eq('str or None if sys.version_info[0] > (3,) else str or bytes or None')
Expand Down Expand Up @@ -423,6 +441,27 @@ def foo():
def bar(arg: (yield)): pass
"""))

# TODO: RUSTPYTHON
@unittest.expectedFailure
def test_get_type_hints_on_func_with_variadic_arg(self):
# `typing.get_type_hints` might break on a function with a variadic
# annotation (e.g. `f(*args: *Ts)`) if `from __future__ import
# annotations`, because it could try to evaluate `*Ts` as an expression,
# which on its own isn't value syntax.
namespace = self._exec_future(dedent("""\
class StarredC: pass
class C:
def __iter__(self):
yield StarredC()
c = C()
def f(*args: *c): pass
import typing
hints = typing.get_type_hints(f)
"""))

hints = namespace.pop('hints')
self.assertIsInstance(hints['args'], namespace['StarredC'])


if __name__ == "__main__":
unittest.main()
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