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"""Assertions for Blueberry package."""
import contextlib
from typing import Iterator, Type
from mobly import signals
@contextlib.contextmanager
def assert_not_raises(
exception: Type[Exception] = Exception) -> Iterator[None]:
"""Asserts that the exception is not raised.
This assertion function is used to catch a specified exception
(or any exceptions) and raise signal.TestFailure instead.
Usage:
```
with asserts.assert_not_raises(signals.TestError):
foo()
```
Args:
exception: Exception to be catched. If not specify, catch any exceptions as
default.
Yields:
A context which may raise the exception.
Raises:
signals.TestFailure: raised when the exception is catched in the context.
"""
try:
yield
except exception as e: # pylint: disable=broad-except
raise signals.TestFailure(e)
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