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diskimage-builder/diskimage_builder/block_device/tests/test_config.py

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# 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 logging
from diskimage_builder.block_device.config import config_tree_to_graph
from diskimage_builder.block_device.config import create_graph
from diskimage_builder.block_device.exception import \
BlockDeviceSetupException
from diskimage_builder.block_device.tests.test_base import TestBase
logger = logging.getLogger(__name__)
class TestConfig(TestBase):
"""Helper for setting up and reading a config"""
def setUp(self):
super(TestConfig, self).setUp()
# previously we mocked some globals here ...
class TestGraphGeneration(TestConfig):
"""Extra helper class for testing graph generation"""
def setUp(self):
super(TestGraphGeneration, self).setUp()
self.fake_default_config = {
'build-dir': '/fake',
'image-size': '1000',
'image-dir': '/fake',
'mount-base': '/fake',
}
class TestConfigParsing(TestConfig):
"""Test parsing config file into a graph"""
# test an entry in the config not being a valid plugin
def test_config_bad_plugin(self):
config = self.load_config_file('bad_plugin.yaml')
self.assertRaises(BlockDeviceSetupException,
config_tree_to_graph,
config)
# test a config that has multiple keys for a top-level entry
def test_config_multikey_node(self):
config = self.load_config_file('multi_key_node.yaml')
self.assertRaisesRegex(BlockDeviceSetupException,
"Config entry top-level should be a single "
"dict:",
config_tree_to_graph,
config)
# a graph should remain the same
def test_graph(self):
graph = self.load_config_file('simple_graph.yaml')
parsed_graph = config_tree_to_graph(graph)
self.assertCountEqual(parsed_graph, graph)
# equivalence of simple tree to graph
def test_simple_tree(self):
tree = self.load_config_file('simple_tree.yaml')
graph = self.load_config_file('simple_graph.yaml')
parsed_graph = config_tree_to_graph(tree)
self.assertCountEqual(parsed_graph, graph)
# equivalence of a deeper tree to graph
def test_deep_tree(self):
tree = self.load_config_file('deep_tree.yaml')
graph = self.load_config_file('deep_graph.yaml')
parsed_graph = config_tree_to_graph(tree)
self.assertCountEqual(parsed_graph, graph)
# equivalence of a complicated multi-partition tree to graph
def test_multipart_tree(self):
tree = self.load_config_file('multiple_partitions_tree.yaml')
graph = self.load_config_file('multiple_partitions_graph.yaml')
parsed_graph = config_tree_to_graph(tree)
logger.debug(parsed_graph)
self.assertCountEqual(parsed_graph, graph)
class TestCreateGraph(TestGraphGeneration):
# Test a graph with bad edge pointing to an invalid node
def test_invalid_missing(self):
config = self.load_config_file('bad_edge_graph.yaml')
self.assertRaisesRegex(BlockDeviceSetupException,
"Edge not defined: this_is_not_a_node",
create_graph,
config, self.fake_default_config, {})
# Test a graph with bad edge pointing to an invalid node
def test_duplicate_name(self):
config = self.load_config_file('duplicate_name.yaml')
self.assertRaisesRegex(BlockDeviceSetupException,
"Duplicate node name: "
"this_is_a_duplicate",
create_graph,
config, self.fake_default_config, {})
# Test digraph generation from deep_graph config file
def test_deep_graph_generator(self):
config = self.load_config_file('deep_graph.yaml')
graph, call_order = create_graph(config, self.fake_default_config, {})
call_order_list = [n.name for n in call_order]
# manually created from deep_graph.yaml
# Note unlike below, the sort here is stable because the graph
# doesn't have multiple paths with only one partition
call_order_names = ['image0', 'root', 'mkfs_root',
'mount_mkfs_root',
'fstab_mount_mkfs_root']
self.assertListEqual(call_order_list, call_order_names)
# Test multiple partition digraph generation
def test_multiple_partitions_graph_generator(self):
config = self.load_config_file('multiple_partitions_graph.yaml')
graph, call_order = create_graph(config, self.fake_default_config, {})
call_order_list = [n.name for n in call_order]
# The sort creating call_order_list is unstable.
# We want to ensure we see the "partitions" object in
# root->var->var_log order
root_pos = call_order_list.index('root')
var_pos = call_order_list.index('var')
var_log_pos = call_order_list.index('var_log')
self.assertGreater(var_pos, root_pos)
self.assertGreater(var_log_pos, var_pos)
# Ensure mkfs happens after partition
mkfs_root_pos = call_order_list.index('mkfs_root')
self.assertLess(root_pos, mkfs_root_pos)
mkfs_var_pos = call_order_list.index('mkfs_var')
self.assertLess(var_pos, mkfs_var_pos)
mkfs_var_log_pos = call_order_list.index('mkfs_var_log')
self.assertLess(var_log_pos, mkfs_var_log_pos)