824a9e91c4
Making the global state reference a defined part of the node makes some parts of the block device processing easier and removes the need for other global values. The state is passed to PluginNodeBase.__init__() and expected to be passed into all nodes as they are created. NodeBase.__init__() is updated with the new paramater 'state'. The parameter is removed from the create() call as nodes can simply reference it at any point as "self.state". This is similar to 1cdc8b20373c5d582ea928cfd7334469ff36dbce, except it is based on I68840594a34af28d41d9522addcfd830bd203b97 which loads the node-list from pickled state for later cmd_* calls. Thus we only build the state *once*, at cmd_create() time as we build the node list. Change-Id: I468dbf5134947629f125504513703d6f2cdace59
115 lines
4.0 KiB
Python
115 lines
4.0 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import codecs
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import fixtures
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import json
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import logging
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import os
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from stevedore import extension
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from testtools.matchers import FileExists
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import diskimage_builder.block_device.blockdevice as bd
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import diskimage_builder.block_device.tests.test_base as tb
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from diskimage_builder.block_device.exception import \
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BlockDeviceSetupException
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logger = logging.getLogger(__name__)
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class TestStateBase(tb.TestBase):
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def setUp(self):
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super(TestStateBase, self).setUp()
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# override the extensions to the test extensions
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test_extensions = extension.ExtensionManager(
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namespace='diskimage_builder.block_device.plugin_test',
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invoke_on_load=False)
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extensions_fixture = fixtures.MonkeyPatch(
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'diskimage_builder.block_device.config._extensions',
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test_extensions)
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self.useFixture(extensions_fixture)
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# status and other bits saved here
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self.build_dir = fixtures.TempDir()
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self.useFixture(self.build_dir)
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class TestState(TestStateBase):
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# The the state generation & saving methods
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def test_state_create(self):
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params = {
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'build-dir': self.build_dir.path,
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'config': self.get_config_file('cmd_create.yaml')
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}
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bd_obj = bd.BlockDevice(params)
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bd_obj.cmd_init()
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bd_obj.cmd_create()
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# cmd_create should have persisted this to disk
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state_file = bd_obj.state_json_file_name
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self.assertThat(state_file, FileExists())
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# ensure we see the values put in by the test extensions
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# persisted
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with codecs.open(state_file, encoding='utf-8', mode='r') as fd:
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state = json.load(fd)
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self.assertDictEqual(state,
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{'test_a': {'value': 'foo',
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'value2': 'bar'},
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'test_b': {'value': 'baz'},
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'test_init_state': 'here'})
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pickle_file = bd_obj.node_pickle_file_name
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self.assertThat(pickle_file, FileExists())
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# run umount, which should load the picked nodes and run in
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# reverse. This will create some state in "test_b" that it
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# added to by "test_a" ... ensuring it was run backwards.
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bd_obj.cmd_umount()
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# Test state going missing between phases
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def test_missing_state(self):
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params = {
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'build-dir': self.build_dir.path,
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'config': self.get_config_file('cmd_create.yaml')
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}
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bd_obj = bd.BlockDevice(params)
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bd_obj.cmd_init()
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bd_obj.cmd_create()
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# cmd_create should have persisted this to disk
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state_file = os.path.join(self.build_dir.path,
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'states', 'block-device',
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'state.json')
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self.assertThat(state_file, FileExists())
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# simulate the state somehow going missing, and ensure that
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# later calls notice
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os.unlink(state_file)
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self.assertRaisesRegex(BlockDeviceSetupException,
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"State dump not found",
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bd_obj.cmd_cleanup)
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self.assertRaisesRegex(BlockDeviceSetupException,
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"State dump not found",
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bd_obj.cmd_writefstab)
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self.assertRaisesRegex(BlockDeviceSetupException,
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"State dump not found",
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bd_obj.cmd_delete)
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