248 lines
8.5 KiB
Python
248 lines
8.5 KiB
Python
# Copyright 2018 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Tests for check_k8s_node_status functions"""
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from unittest import mock
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from shipyard_airflow.plugins.check_k8s_node_status import (
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check_node_status
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)
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class MockNodeStatus:
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"""A fake response object used to simulate a k8s node status item"""
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def __init__(self, name, status, message):
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self.metadata = mock.MagicMock()
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self.metadata.name = name
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self.item = mock.MagicMock()
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self.item.status = status
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self.item.message = message
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self.status = mock.MagicMock()
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self.status.conditions = [self.item]
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class MalformedNodeStatus:
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"""A malformed response object used to simulate a k8s node status item
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Accepts a name, if the name field should be formed correctly.
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"""
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def __init__(self, name=None):
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if name:
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self.metadata = mock.MagicMock()
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self.metadata.name = name
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self.status = mock.MagicMock()
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self.status.conditions = "broken"
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def gen_check_node_status(response_dict):
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"""Generate a function that will return the requested response dict
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:param response_dict: the set of responses to return
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"""
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class _StatefulResponder:
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def __init__(self, res_dict=response_dict):
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self.res_dict = res_dict
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self.invocation = 0
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def responder(self):
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ret = mock.MagicMock()
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if str(self.invocation) in self.res_dict:
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ret.items = self.res_dict.get(str(self.invocation))
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else:
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ret.items = self.res_dict.get('final')
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self.invocation += 1
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return ret
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sr = _StatefulResponder()
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return sr.responder
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# Node names used in these tests will be represented by a letter and number
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# E.g. a1, a2, a3, b1, b2, etc.
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# The following dictionaries are sequences of response objects that are
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# returned from the _get_all_k8s_node_status substitute method.
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# Successful single invocation response. 3 nodes, a1, b1, c1, all ready on the
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# first pass
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INV_SEQ_A = {
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'final': [
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MockNodeStatus('a1', 'True', 'Ready'),
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MockNodeStatus('b1', 'True', 'Ready'),
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MockNodeStatus('c1', 'True', 'Ready'),
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]
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}
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# Successful invocation response. 3 nodes, a1, b1, c1, ready after three
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# passes
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INV_SEQ_B = {
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'0': [
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],
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'1': [
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MockNodeStatus('c1', 'True', 'Ready'),
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],
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'2': [
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MockNodeStatus('c1', 'True', 'Ready'),
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],
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'final': [
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MockNodeStatus('a1', 'True', 'Ready'),
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MockNodeStatus('b1', 'True', 'Ready'),
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MockNodeStatus('c1', 'True', 'Ready'),
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]
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}
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# Successful invocation response. 3 nodes, a1, b1, c1, ready after three
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# passes with non-ready nodes appearing along the way
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INV_SEQ_C = {
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'0': [
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MockNodeStatus('a1', 'False', 'Not Ready'),
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],
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'1': [
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MockNodeStatus('a1', 'False', 'Not Ready'),
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MockNodeStatus('b1', 'False', 'Not Ready'),
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MockNodeStatus('c1', 'True', 'Ready'),
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],
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'2': [
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MockNodeStatus('a1', 'False', 'Not Ready'),
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MockNodeStatus('b1', 'True', 'Ready'),
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MockNodeStatus('c1', 'True', 'Ready'),
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],
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'final': [
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MockNodeStatus('a1', 'True', 'Ready'),
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MockNodeStatus('b1', 'True', 'Ready'),
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MockNodeStatus('c1', 'True', 'Ready'),
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]
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}
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# Malformed invocation response on first try.
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# Successful node c1
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INV_SEQ_D = {
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'final': [
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MalformedNodeStatus('a1'),
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MalformedNodeStatus(),
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MockNodeStatus('c1', 'True', 'Ready'),
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],
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}
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class TestCheckK8sNodeStatus:
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@mock.patch("shipyard_airflow.plugins.check_k8s_node_status."
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"_get_all_k8s_node_status",
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new=gen_check_node_status(INV_SEQ_A))
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def test_check_node_status_all_success(self):
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"""Assert that check_node_status completes successfully
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Simple case - all nodes ready when response has all values
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(set input)
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"""
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not_found_nodes = check_node_status(10, 1, set(['a1', 'b1', 'c1']))
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assert not not_found_nodes
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@mock.patch("shipyard_airflow.plugins.check_k8s_node_status."
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"_get_all_k8s_node_status",
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new=gen_check_node_status(INV_SEQ_A))
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def test_check_node_status_simple_failure(self):
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"""Assert that check_node_status completes successfully with failures
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Some nodes successful, but looking for some that never show up.
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(list input)
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"""
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not_found_nodes = check_node_status(1, 1, ['a1', 'b1', 'c1', 'z1'])
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assert not_found_nodes == ['z1']
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@mock.patch("shipyard_airflow.plugins.check_k8s_node_status."
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"_get_all_k8s_node_status",
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new=gen_check_node_status(INV_SEQ_B))
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def test_check_node_status_all_success_4th(self):
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"""Assert that check_node_status completes successfully
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All nodes ready on 4th iteration
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"""
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not_found_nodes = check_node_status(3, 1, set(['a1', 'b1', 'c1']))
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assert not not_found_nodes
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@mock.patch("shipyard_airflow.plugins.check_k8s_node_status."
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"_get_all_k8s_node_status",
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new=gen_check_node_status(INV_SEQ_B))
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def test_check_node_status_timeout_before_4th(self):
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"""Assert that check_node_status completes successfully with failures
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Some nodes not ready before timeout (before 4th iteration)
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"""
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not_found_nodes = check_node_status(2, 1, set(['a1', 'b1', 'c1']))
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assert 'a1' in not_found_nodes
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assert 'b1' in not_found_nodes
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assert 'c1' not in not_found_nodes
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@mock.patch("shipyard_airflow.plugins.check_k8s_node_status."
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"_get_all_k8s_node_status",
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new=gen_check_node_status(INV_SEQ_C))
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def test_check_node_status_success_changing_status(self):
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"""Assert that check_node_status completes successfully
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Nodes go from not ready to ready
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"""
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not_found_nodes = check_node_status(30, 1, set(['a1', 'b1', 'c1']))
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assert not not_found_nodes
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def test_check_node_status_no_interest(self):
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"""Assert that check_node_status completes successfully
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Returns empty array because nothing was requested to look for.
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"""
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not_found_nodes = check_node_status(3, 1, expected_nodes=None)
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assert not not_found_nodes
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not_found_nodes = check_node_status(3, 1, [])
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assert not not_found_nodes
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not_found_nodes = check_node_status(3, 1, set([]))
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assert not not_found_nodes
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@mock.patch("shipyard_airflow.plugins.check_k8s_node_status."
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"_get_all_k8s_node_status",
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new=gen_check_node_status(INV_SEQ_D))
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def test_check_node_status_malformed(self):
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"""Assert that check_node_status completes successfully
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Nodes go from not ready to ready
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"""
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not_found_nodes = check_node_status(1, 1, set(['a1', 'b1', 'c1']))
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assert 'a1' in not_found_nodes
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assert 'b1' in not_found_nodes
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assert 'c1' not in not_found_nodes
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def test_check_node_status_error_not_connected_to_k8s(self):
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"""Assert that check_node_status completes successfully with failures
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No nodes found because of errors doing lookup.
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"""
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not_found_nodes = check_node_status(1, 1, set(['a1', 'b1', 'c1']))
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assert 'a1' in not_found_nodes
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assert 'b1' in not_found_nodes
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assert 'c1' in not_found_nodes
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@mock.patch("shipyard_airflow.plugins.check_k8s_node_status."
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"_get_all_k8s_node_status",
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new=gen_check_node_status(INV_SEQ_A))
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def test_check_node_status_bad_intervals(self):
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"""Assert that check_node_status completes successfully
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With bogus timeout and interval values
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"""
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not_found_nodes = check_node_status(-1, -1, set(['a1', 'b1', 'c1']))
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assert not not_found_nodes
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not_found_nodes = check_node_status(1, 5, set(['a1', 'b1', 'z1']))
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assert not_found_nodes == ['z1']
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