7341542f2c
Add a range of unit-testing for configuration parsing, graph generation and mount-point generation. Unfortunately there's some global variable hacks, and some stubs, but it's a start. Change-Id: I9e4f950c2c2ea656fc0c1a14594059fb4c62fa35
160 lines
6.2 KiB
Python
160 lines
6.2 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 fixtures
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import logging
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import os
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import testtools
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import yaml
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from diskimage_builder.block_device.blockdevice \
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import BlockDevice
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logger = logging.getLogger(__name__)
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class TestConfig(testtools.TestCase):
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"""Helper for setting up and reading a config"""
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def setUp(self):
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super(TestConfig, self).setUp()
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fs = '%(asctime)s %(levelname)s [%(name)s] %(message)s'
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self.log_fixture = self.useFixture(
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fixtures.FakeLogger(level=logging.DEBUG, format=fs))
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# reset all globals for each test.
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# XXX: remove globals :/
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import diskimage_builder.block_device.level2.mkfs
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diskimage_builder.block_device.level2.mkfs.file_system_labels = set()
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import diskimage_builder.block_device.level3.mount
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diskimage_builder.block_device.level3.mount.mount_points = {}
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diskimage_builder.block_device.level3.mount.sorted_mount_points = None
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def load_config_file(self, f):
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path = os.path.join(os.path.dirname(__file__),
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'config', f)
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with open(path, 'r') as config:
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return yaml.safe_load(config)
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class TestGraphGeneration(TestConfig):
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"""Extra helper class for testing graph generation"""
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def setUp(self):
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super(TestGraphGeneration, self).setUp()
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self.fake_default_config = {
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'build-dir': '/fake',
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'image-size': '1000',
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'image-dir': '/fake',
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'mount-base': '/fake',
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}
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self.bd = BlockDevice(self.fake_default_config)
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# NOTE: inherits from TestGraphGeneration for simplicity to get
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# BlockDevice.plugin_manager object for _config_tree_to_diagraph.
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# Config parsing can be moved separately (and not require a
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# BlockDevice object) in a later change.
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class TestConfigParsing(TestGraphGeneration):
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"""Test parsing config file into a graph"""
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def test_config_bad_plugin(self):
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# Currently, configuration parsing does not notice a missing
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# plugin. This is left as a stub
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return
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# config = self.load_config_file('bad_plugin.yaml')
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# self.assertRaises(BlockDeviceSetupException,
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# self.bd._config_tree_to_digraph,
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# config, self.bd.plugin_manager)
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# a graph should remain the same
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def test_graph(self):
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graph = self.load_config_file('simple_graph.yaml')
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parsed_graph = self.bd._config_tree_to_digraph(graph,
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self.bd.plugin_manager)
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self.assertEqual(parsed_graph, graph)
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# equivalence of simple tree to graph
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def test_simple_tree(self):
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tree = self.load_config_file('simple_tree.yaml')
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graph = self.load_config_file('simple_graph.yaml')
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parsed_graph = self.bd.\
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_config_tree_to_digraph(tree,
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self.bd.plugin_manager)
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self.assertItemsEqual(parsed_graph, graph)
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# equivalence of a deeper tree to graph
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def test_deep_tree(self):
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tree = self.load_config_file('deep_tree.yaml')
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graph = self.load_config_file('deep_graph.yaml')
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parsed_graph = self.bd.\
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_config_tree_to_digraph(tree, self.bd.plugin_manager)
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self.assertItemsEqual(parsed_graph, graph)
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# equivalence of a complicated multi-partition tree to graph
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def test_multipart_tree(self):
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tree = self.load_config_file('multiple_partitions_tree.yaml')
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graph = self.load_config_file('multiple_partitions_graph.yaml')
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parsed_graph = self.bd._config_tree_to_digraph(tree,
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self.bd.plugin_manager)
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logger.debug(parsed_graph)
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self.assertItemsEqual(parsed_graph, graph)
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class TestCreateGraph(TestGraphGeneration):
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# Test digraph generation from deep_graph config file
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def test_deep_graph_generator(self):
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config = self.load_config_file('deep_graph.yaml')
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graph, call_order = self.bd.create_graph(config,
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self.fake_default_config)
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call_order_list = [n.name for n in call_order]
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# manually created from deep_graph.yaml
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# Note unlike below, the sort here is stable because the graph
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# doesn't have multiple paths with only one partition
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call_order_names = ['image0', 'root', 'mkfs_root',
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'mount_mkfs_root',
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'fstab_mount_mkfs_root']
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self.assertListEqual(call_order_list, call_order_names)
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# Test multiple parition digraph generation
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def test_multiple_partitions_graph_generator(self):
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config = self.load_config_file('multiple_partitions_graph.yaml')
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graph, call_order = self.bd.create_graph(config,
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self.fake_default_config)
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call_order_list = [n.name for n in call_order]
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# The sort creating call_order_list is unstable.
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# We want to ensure we see the "partitions" object in
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# root->var->var_log order
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root_pos = call_order_list.index('root')
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var_pos = call_order_list.index('var')
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var_log_pos = call_order_list.index('var_log')
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self.assertGreater(var_pos, root_pos)
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self.assertGreater(var_log_pos, var_pos)
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# Ensure mkfs happens after partition
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mkfs_root_pos = call_order_list.index('mkfs_root')
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self.assertLess(root_pos, mkfs_root_pos)
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mkfs_var_pos = call_order_list.index('mkfs_var')
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self.assertLess(var_pos, mkfs_var_pos)
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mkfs_var_log_pos = call_order_list.index('mkfs_var_log')
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self.assertLess(var_log_pos, mkfs_var_log_pos)
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