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5f63b3a7bb
* chore: drop deprecated tables and remove unused code * isort imports * migration: check for table existence before drop
60 lines
1.5 KiB
Python
60 lines
1.5 KiB
Python
import pytest
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from util.failover import FailoverException, failover
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class FinishedException(Exception):
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"""
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Exception raised at the end of every iteration to force failover.
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"""
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class Counter(object):
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"""
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Wraps a counter in an object so that it'll be passed by reference.
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"""
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def __init__(self):
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self.calls = 0
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def increment(self):
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self.calls += 1
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@failover
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def my_failover_func(i, should_raise=None):
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"""
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Increments a counter and raises an exception when told.
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"""
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i.increment()
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if should_raise is not None:
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raise should_raise()
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raise FailoverException(FinishedException())
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@pytest.mark.parametrize(
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"stop_on,exception",
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[
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(10, None),
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(5, IndexError),
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],
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)
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def test_readonly_failover(stop_on, exception):
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"""
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Generates failover arguments and checks against a counter to ensure that the failover function
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has been called the proper amount of times and stops at unhandled exceptions.
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"""
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counter = Counter()
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arg_sets = []
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for i in range(stop_on):
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should_raise = exception if exception is not None and i == stop_on - 1 else None
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arg_sets.append(((counter,), {"should_raise": should_raise}))
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if exception is not None:
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with pytest.raises(exception):
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my_failover_func(*arg_sets)
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else:
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with pytest.raises(FinishedException):
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my_failover_func(*arg_sets)
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assert counter.calls == stop_on
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