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def format_call(call):
if hasattr(call, "format"):
return call.format()
return call
def show_calls(name_list, call_list):
return "\n".join(
[
" {0}. '{1}': {2}".format(i, x[0], format_call(x[1]))
for i, x in enumerate(zip(name_list, call_list, strict=False))
]
)
class Queue:
def __init__(self, call_list_builder=None):
if not call_list_builder:
call_list_builder = CallListBuilder()
self.__call_list = call_list_builder.calls
self.__name_list = call_list_builder.names
self.__index = 0
def take(self, type_of_call, real_call_info=None):
if self.__index >= len(self.__call_list):
raise self.__extra_call(type_of_call, real_call_info)
call = self.__call_list[self.__index]
if call.type != type_of_call:
raise self.__unexpected_type(call, type_of_call, real_call_info)
self.__index += 1
return self.__index, call
def has_type(self, call_type):
return any(call.type == call_type for call in self.__call_list)
@property
def remaining(self):
return self.__call_list[self.__index :]
@property
def taken(self):
return self.__call_list[: self.__index]
def error_with_context(self, message):
return AssertionError(
"{0}\nAll calls in queue (current index={1}):\n{2}".format(
message,
self.__index,
show_calls(self.__name_list, self.__call_list),
)
)
def __unexpected_type(self, call, real_type, real_call_info):
return self.error_with_context(
(
"{0}. call was expected as '{1}' type but was '{2}' type"
"\n expected call: {3}{4}"
"\nHint: check call compatibility: for example if you use"
" env.push_cib() then runner.cib.push() will be never launched"
).format(
self.__index,
call.type,
real_type,
call,
(
"\n real call: {0}".format(real_call_info)
if real_call_info
else ""
),
)
)
def __extra_call(self, type_of_call, real_call_info):
return self.error_with_context(
"No next call expected, but was ({0}):\n '{1}'".format(
type_of_call, real_call_info
)
)
class CallListBuilder:
def __init__(self):
self.__call_list = []
self.__name_list = []
@property
def calls(self):
return list(self.__call_list)
@property
def names(self):
return list(self.__name_list)
def __set(self, instead_name, name, call):
"""
Replace call that has key instead_name with new call that has key name
string name -- key of the call
Call call
string instead_name -- key of call instead of which this new call is to
be placed
"""
if instead_name not in self.__name_list:
raise self.__cannot_put("instead of", instead_name, name, call)
for i, current_name in enumerate(self.__name_list):
if current_name == instead_name:
self.__call_list[i] = call
# yes we change the name as well
self.__name_list[i] = name
return
def __append(self, name, call):
"""
Append call.
string name -- key of the call
Call call
"""
self.__name_list.append(name)
self.__call_list.append(call)
def __insert(self, before_name, name, call):
"""
Insert call before call with before_name.
string before_name -- key of call before which this new call is to be
placed
string name -- key of the call
Call call
"""
if before_name not in self.__name_list:
raise self.__cannot_put("before", before_name, name, call)
index = self.__name_list.index(before_name)
self.__name_list.insert(index, name)
self.__call_list.insert(index, call)
def remove(self, name):
"""
Remove a call with the specified name
"""
try:
index = self.__name_list.index(name)
del self.__call_list[index]
del self.__name_list[index]
except ValueError as e:
raise self.__name_not_exists(name) from e
def trim_before(self, name):
"""
Remove a call with the specified name and all calls after it from the list
"""
try:
index = self.__name_list.index(name)
self.__call_list = self.__call_list[:index]
self.__name_list = self.__name_list[:index]
except ValueError as e:
raise self.__name_not_exists(name) from e
def get(self, name):
"""
Get first call with name.
string name -- key of the call
"""
try:
return self.__call_list[self.__name_list.index(name)]
except ValueError as e:
raise self.__name_not_exists(name) from e
def place(self, name, call, before=None, instead=None):
"""
Place call into calllist.
string name -- key of the call
Call call
string before -- key of call before which this new call is to be placed
string instead -- key of call instead of which this new call is to be
placed
"""
if name and name in self.__name_list and instead != name:
raise self.__name_exists_already(name)
if before and instead:
raise self.__cannot_use_before_and_instead(
name,
call,
before,
instead,
)
if not hasattr(call, "type") or not call.type:
raise self.__type_of_call_is_not_specified(call)
if before:
self.__insert(before, name, call)
elif instead:
self.__set(instead, name, call)
else:
self.__append(name, call)
def __error_with_context(self, message):
return AssertionError(
"{0}\nCalls in the configuration call collection are:\n{1}".format(
message,
show_calls(self.__name_list, self.__call_list),
)
)
@staticmethod
def __type_of_call_is_not_specified(call):
return AssertionError(
(
"Class {0}.{1} must have the attribute 'type' with no-falsy "
"value."
).format(call.__module__, call.__class__.__name__)
)
def __name_not_exists(self, name):
return self.__error_with_context(
"Call named '{0}' does not exist.".format(name)
)
def __name_exists_already(self, name):
return self.__error_with_context(
"Name '{0}' is in this configuration already.".format(name)
)
def __cannot_use_before_and_instead(self, name, call, before, instead):
return self.__error_with_context(
(
"Args 'before' ({0}) and 'instead' ({1}) cannot be used"
" together\n '{2}': {3}"
).format(before, instead, name, call)
)
def __cannot_put(self, where_type, where_name, name, call):
return self.__error_with_context(
(
"Cannot put call named '{0}' ({1}) {2} '{3}'"
" because '{3}' does not exist."
).format(
name,
call,
where_type,
where_name,
)
)
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