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Fine-grained: Test "yield from" #4968

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Merged
merged 2 commits into from
Apr 26, 2018
Merged

Fine-grained: Test "yield from" #4968

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Fine-grained: Test "yield from"
JukkaL Apr 24, 2018
6fe456d
Merge branch 'master' into fg-yield-from
JukkaL Apr 26, 2018
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28 changes: 28 additions & 0 deletions test-data/unit/fine-grained.test
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Original file line number Diff line number Diff line change
Expand Up @@ -5806,6 +5806,34 @@ class M(type):
==
a.py:2: error: Argument 1 to "f" of "M" has incompatible type "int"; expected "str"

[case testYieldFrom]
from typing import Iterator
from a import f

def g() -> Iterator[int]:
a = "string"
a = yield from f()

[file a.py]
from typing import Generator

def f() -> Generator[int, None, str]:
yield 5
return "ham"

[file a.py.2]
from typing import Generator

class A: pass

def f() -> Generator[int, None, A]:
yield 5
return A()

[out]
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I would add a test where f is turned into a normal function (just in case).

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Verified that this works but left the test out since this seems unlikely to break (to conserve test running times).

==
main:6: error: Incompatible types in assignment (expression has type "A", variable has type "str")

[case testFString]
from a import g
f'{g(1)}'
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