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146 lines
4.9 KiB
Python
146 lines
4.9 KiB
Python
#!/usr/bin/env python
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import unittest
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from dataclasses import dataclass
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from typing import Any, List
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from app import set_capacity, Queue
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@dataclass
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class TestCase:
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name: str
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min_size: int
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desired_capacity: int
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max_size: int
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queues: List[Queue]
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expected_capacity: int
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class TestSetCapacity(unittest.TestCase):
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class FakeClient:
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def __init__(self):
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self._expected_data = {} # type: dict
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self._expected_capacity = -1
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@property
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def expected_data(self) -> dict:
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"""a one-time property"""
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data, self._expected_data = self._expected_data, {}
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return data
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@expected_data.setter
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def expected_data(self, value: dict) -> None:
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self._expected_data = value
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@property
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def expected_capacity(self) -> int:
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"""one-time property"""
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capacity, self._expected_capacity = self._expected_capacity, -1
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return capacity
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def describe_auto_scaling_groups(self, **kwargs: Any) -> dict:
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_ = kwargs
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return self.expected_data
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def set_desired_capacity(self, **kwargs: Any) -> None:
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self._expected_capacity = kwargs["DesiredCapacity"]
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def data_helper(
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self, name: str, min_size: int, desired_capacity: int, max_size: int
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) -> None:
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self.expected_data = {
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"AutoScalingGroups": [
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{
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"AutoScalingGroupName": name,
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"DesiredCapacity": desired_capacity,
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"MinSize": min_size,
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"MaxSize": max_size,
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}
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]
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}
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def setUp(self):
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self.client = self.FakeClient()
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def test_normal_cases(self):
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test_cases = (
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# Do not change capacity
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TestCase("noqueue", 1, 13, 20, [Queue("in_progress", 155, "noqueue")], -1),
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TestCase("w/reserve", 1, 13, 20, [Queue("queued", 17, "w/reserve")], -1),
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# Increase capacity
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TestCase("increase", 1, 13, 20, [Queue("queued", 23, "increase")], 15),
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TestCase(
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"style-checker", 1, 13, 20, [Queue("queued", 33, "style-checker")], 15
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),
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TestCase("increase", 1, 13, 20, [Queue("queued", 18, "increase")], 14),
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TestCase("increase", 1, 13, 20, [Queue("queued", 183, "increase")], 20),
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TestCase(
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"increase-w/o reserve",
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1,
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13,
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20,
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[
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Queue("in_progress", 11, "increase-w/o reserve"),
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Queue("queued", 12, "increase-w/o reserve"),
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],
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15,
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),
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TestCase("lower-min", 10, 5, 20, [Queue("queued", 5, "lower-min")], 10),
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# Decrease capacity
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TestCase("w/reserve", 1, 13, 20, [Queue("queued", 5, "w/reserve")], 9),
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TestCase(
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"style-checker", 1, 13, 20, [Queue("queued", 5, "style-checker")], 5
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),
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TestCase("w/reserve", 1, 23, 20, [Queue("queued", 17, "w/reserve")], 20),
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TestCase("decrease", 1, 13, 20, [Queue("in_progress", 3, "decrease")], 8),
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TestCase(
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"style-checker",
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1,
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13,
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20,
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[Queue("in_progress", 5, "style-checker")],
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5,
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),
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)
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for t in test_cases:
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self.client.data_helper(t.name, t.min_size, t.desired_capacity, t.max_size)
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set_capacity(t.name, t.queues, self.client, False)
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self.assertEqual(t.expected_capacity, self.client.expected_capacity, t.name)
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def test_exceptions(self):
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test_cases = (
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(
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TestCase(
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"different names",
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1,
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1,
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1,
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[Queue("queued", 5, "another name")],
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-1,
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),
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AssertionError,
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),
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(TestCase("wrong queue len", 1, 1, 1, [], -1), AssertionError),
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(
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TestCase(
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"wrong queue", 1, 1, 1, [Queue("wrong", 1, "wrong queue")], -1 # type: ignore
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),
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ValueError,
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),
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)
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for t, error in test_cases:
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with self.assertRaises(error):
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self.client.data_helper(
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t.name, t.min_size, t.desired_capacity, t.max_size
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)
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set_capacity(t.name, t.queues, self.client, False)
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with self.assertRaises(AssertionError):
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self.client.expected_data = {"AutoScalingGroups": [1, 2]}
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set_capacity(
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"wrong number of ASGs",
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[Queue("queued", 1, "wrong number of ASGs")],
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self.client,
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)
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