def test_function(self):
prio_dict = {
5: ['obj0', 'obj1', 'obj2', 'obj3'],
10: ['obj4', 'obj5'],
11: ['obj6'],
15: [],
20: ['obj7'],
}
result = list(utils.iter_prio_dict(prio_dict))
self.assertEqual(result, ['obj%d' % i for i in range(8)])
def _get_extension_classes(cls):
"""
Retrieve the extension classes in priority order.
:returns: A list of extension classes, in proper priority
order.
"""
if cls._extension_classes is None:
exts = {}
# Iterate over the entrypoints
for ext in entry.points[NAMESPACE_EXTENSIONS]:
exts.setdefault(ext.priority, [])
exts[ext.priority].append(ext)
# Save the list of extension classes
cls._extension_classes = list(utils.iter_prio_dict(exts))
return cls._extension_classes
def parse_step(cls, ctxt, step_addr, step_conf):
"""
Parse a step dictionary.
:param ctxt: The context object.
:param step_addr: The address of the step in the test
configuration.
:param step_conf: The description of the step. This may be a
scalar string or a dictionary.
:returns: A list of steps.
"""
# Make sure the step makes sense
if isinstance(step_conf, six.string_types):
# Convert string to a dict for uniformity of processing
step_conf = {step_conf: None}
elif not isinstance(step_conf, collections.Mapping):
raise ConfigError(
'Unable to parse step configuration: expecting string or '
'dictionary, not "%s"' % step_conf.__class__.__name__,
step_addr,
)
# Parse the configuration into the action and modifier classes
# and the configuration to apply to each
action_item = None
mod_items = {}
kwargs = {} # extra args for Step.__init__()
for key, key_conf in step_conf.items():
# Handle special keys first
if key in cls.schemas:
# Validate the key
utils.schema_validate(key_conf, cls.schemas[key], ConfigError,
key, step_addr=step_addr)
# Save the value
kwargs[key] = key_conf
# Is it an action?
elif key in entry.points[NAMESPACE_ACTION]:
if action_item is not None:
raise ConfigError(
'Bad step configuration: action "%s" specified, '
'but action "%s" already processed' %
(key, action_item.name),
step_addr,
)
action_item = StepItem(
entry.points[NAMESPACE_ACTION][key], key, key_conf)
# OK, is it a modifier?
elif key in entry.points[NAMESPACE_MODIFIER]:
mod_class = entry.points[NAMESPACE_MODIFIER][key]
# Store it in priority order
mod_items.setdefault(mod_class.priority, [])
mod_items[mod_class.priority].append(StepItem(
mod_class, key, key_conf))
# Couldn't resolve it
else:
raise ConfigError(
'Bad step configuration: unable to resolve action '
'"%s"' % key,
step_addr,
)
# Make sure we have an action
if action_item is None:
raise ConfigError(
'Bad step configuration: no action specified',
step_addr,
)
# What is the action type?
action_type = (Modifier.STEP if action_item.cls.step_action
else Modifier.NORMAL)
# OK, build our modifiers list and preprocess the action
# configuration
modifiers = []
for mod_item in utils.iter_prio_dict(mod_items):
# Verify that the modifier is compatible with the
# action
if mod_item.cls.restriction & action_type == 0:
raise ConfigError(
'Bad step configuration: modifier "%s" is '
'incompatible with the action "%s"' %
(mod_item.name, action_item.name),
step_addr,
)
# Initialize the modifier
modifier = mod_item.init(ctxt, step_addr)
# Add it to the list of modifiers
modifiers.append(modifier)
# Apply the modifier's configuration processing
action_item.conf = modifier.action_conf(
ctxt, action_item.cls, action_item.name, action_item.conf,
step_addr)
# Now we can initialize the action
action = action_item.init(ctxt, step_addr)
# Create the step
step = cls(step_addr, action, modifiers, **kwargs)
# If the final_action is a StepAction, invoke it now and
# return the list of steps. We do this after creating the
# Step object so that we can take advantage of its handling of
# modifiers.
if action_item.cls.step_action:
return step(ctxt)
# Not a step action, return the step as a list of one element
return [step]
