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# Copyright 2017 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import datetime
import itertools
from unittest import mock
from google.api_core import timeout as timeouts
def test__exponential_timeout_generator_base_2():
gen = timeouts._exponential_timeout_generator(1.0, 60.0, 2.0, deadline=None)
result = list(itertools.islice(gen, 8))
assert result == [1, 2, 4, 8, 16, 32, 60, 60]
@mock.patch("google.api_core.datetime_helpers.utcnow", autospec=True)
def test__exponential_timeout_generator_base_deadline(utcnow):
# Make each successive call to utcnow() advance one second.
utcnow.side_effect = [
datetime.datetime.min + datetime.timedelta(seconds=n) for n in range(15)
]
gen = timeouts._exponential_timeout_generator(1.0, 60.0, 2.0, deadline=30.0)
result = list(itertools.islice(gen, 14))
# Should grow until the cumulative time is > 30s, then start decreasing as
# the cumulative time approaches 60s.
assert result == [1, 2, 4, 8, 16, 24, 23, 22, 21, 20, 19, 18, 17, 16]
class TestTimeToDeadlineTimeout(object):
def test_constructor(self):
timeout_ = timeouts.TimeToDeadlineTimeout()
assert timeout_._timeout is None
def test_constructor_args(self):
timeout_ = timeouts.TimeToDeadlineTimeout(42.0)
assert timeout_._timeout == 42.0
def test___str__(self):
timeout_ = timeouts.TimeToDeadlineTimeout(1)
assert str(timeout_) == "<TimeToDeadlineTimeout timeout=1.0>"
def test_apply(self):
target = mock.Mock(spec=["__call__", "__name__"], __name__="target")
datetime.datetime.now(tz=datetime.timezone.utc)
datetime.timedelta(seconds=1)
now = datetime.datetime.now(tz=datetime.timezone.utc)
times = [
now,
now + datetime.timedelta(seconds=0.0009),
now + datetime.timedelta(seconds=1),
now + datetime.timedelta(seconds=39),
now + datetime.timedelta(seconds=42),
now + datetime.timedelta(seconds=43),
]
def _clock():
return times.pop(0)
timeout_ = timeouts.TimeToDeadlineTimeout(42.0, _clock)
wrapped = timeout_(target)
wrapped()
target.assert_called_with(timeout=42.0)
wrapped()
target.assert_called_with(timeout=41.0)
wrapped()
target.assert_called_with(timeout=3.0)
wrapped()
target.assert_called_with(timeout=0.0)
wrapped()
target.assert_called_with(timeout=0.0)
def test_apply_no_timeout(self):
target = mock.Mock(spec=["__call__", "__name__"], __name__="target")
datetime.datetime.now(tz=datetime.timezone.utc)
datetime.timedelta(seconds=1)
now = datetime.datetime.now(tz=datetime.timezone.utc)
times = [
now,
now + datetime.timedelta(seconds=0.0009),
now + datetime.timedelta(seconds=1),
now + datetime.timedelta(seconds=2),
]
def _clock():
return times.pop(0)
timeout_ = timeouts.TimeToDeadlineTimeout(clock=_clock)
wrapped = timeout_(target)
wrapped()
target.assert_called_with()
wrapped()
target.assert_called_with()
def test_apply_passthrough(self):
target = mock.Mock(spec=["__call__", "__name__"], __name__="target")
timeout_ = timeouts.TimeToDeadlineTimeout(42.0)
wrapped = timeout_(target)
wrapped(1, 2, meep="moop")
target.assert_called_once_with(1, 2, meep="moop", timeout=42.0)
class TestConstantTimeout(object):
def test_constructor(self):
timeout_ = timeouts.ConstantTimeout()
assert timeout_._timeout is None
def test_constructor_args(self):
timeout_ = timeouts.ConstantTimeout(42.0)
assert timeout_._timeout == 42.0
def test___str__(self):
timeout_ = timeouts.ConstantTimeout(1)
assert str(timeout_) == "<ConstantTimeout timeout=1.0>"
def test_apply(self):
target = mock.Mock(spec=["__call__", "__name__"], __name__="target")
timeout_ = timeouts.ConstantTimeout(42.0)
wrapped = timeout_(target)
wrapped()
target.assert_called_once_with(timeout=42.0)
def test_apply_passthrough(self):
target = mock.Mock(spec=["__call__", "__name__"], __name__="target")
timeout_ = timeouts.ConstantTimeout(42.0)
wrapped = timeout_(target)
wrapped(1, 2, meep="moop")
target.assert_called_once_with(1, 2, meep="moop", timeout=42.0)
class TestExponentialTimeout(object):
def test_constructor(self):
timeout_ = timeouts.ExponentialTimeout()
assert timeout_._initial == timeouts._DEFAULT_INITIAL_TIMEOUT
assert timeout_._maximum == timeouts._DEFAULT_MAXIMUM_TIMEOUT
assert timeout_._multiplier == timeouts._DEFAULT_TIMEOUT_MULTIPLIER
assert timeout_._deadline == timeouts._DEFAULT_DEADLINE
def test_constructor_args(self):
timeout_ = timeouts.ExponentialTimeout(1, 2, 3, 4)
assert timeout_._initial == 1
assert timeout_._maximum == 2
assert timeout_._multiplier == 3
assert timeout_._deadline == 4
def test_with_timeout(self):
original_timeout = timeouts.ExponentialTimeout()
timeout_ = original_timeout.with_deadline(42)
assert original_timeout is not timeout_
assert timeout_._initial == timeouts._DEFAULT_INITIAL_TIMEOUT
assert timeout_._maximum == timeouts._DEFAULT_MAXIMUM_TIMEOUT
assert timeout_._multiplier == timeouts._DEFAULT_TIMEOUT_MULTIPLIER
assert timeout_._deadline == 42
def test___str__(self):
timeout_ = timeouts.ExponentialTimeout(1, 2, 3, 4)
assert str(timeout_) == (
"<ExponentialTimeout initial=1.0, maximum=2.0, multiplier=3.0, "
"deadline=4.0>"
)
def test_apply(self):
target = mock.Mock(spec=["__call__", "__name__"], __name__="target")
timeout_ = timeouts.ExponentialTimeout(1, 10, 2)
wrapped = timeout_(target)
wrapped()
target.assert_called_with(timeout=1)
wrapped()
target.assert_called_with(timeout=2)
wrapped()
target.assert_called_with(timeout=4)
def test_apply_passthrough(self):
target = mock.Mock(spec=["__call__", "__name__"], __name__="target")
timeout_ = timeouts.ExponentialTimeout(42.0, 100, 2)
wrapped = timeout_(target)
wrapped(1, 2, meep="moop")
target.assert_called_once_with(1, 2, meep="moop", timeout=42.0)
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