# Path: wiring/dependency.py
# class UnrealizedInjection(tuple):
#     """
#     Instances of this class are placeholders that can be used as default values
#     for arguments to mark that they should be provided with injected
#     :term:`dependency`, without using the :py:func:`inject()` decorator. For
#     example::
# 
#         def __init__(self, db_connection=UnrealizedInjection(IDBConnection)):
#             if not db_connection:
#                 raise ValueError()
# 
#     Note that instances of this class always evaluate to `False` when converted
#     to boolean, to allow easy checking for dependencies that hasn't been
#     injected.
# 
#     Instances of this class are immutable, `as any default argument value in
#     Python should be
#     <http://docs.python-guide.org/en/latest/writing/gotchas/#mutable-default-arguments>`_.
# 
#     There's also an :py:data:`injected` shortcut for this class in this
#     package.
#     """
# 
#     __slots__ = []
# 
#     def __new__(cls, *specification):
#         """
#         You construct this class by giving it :term:`specification` elements.
#         For example, if your specification is::
# 
#             (IDBConnection, 'archive')
# 
#         then you can declare the :term:`dependency` like this::
# 
#             def foo(db=UnrealizedInjection(IDBConnection, 'archive')):
#                 pass
# 
#         When no specification is given to the class constructor,
#         a `ValueError` is raised.
# 
#         :raises:
#             ValueError
#         """
#         if not specification:
#             raise ValueError("No dependency specification given.")
#         if len(specification) == 1:
#             specification = specification[0]
#         else:
#             specification = tuple(specification)
#         return super(UnrealizedInjection, cls).__new__(
#             cls,
#             (specification,)
#         )
# 
#     @property
#     def specification(self):
#         """
#         A :term:`specification` of an object that should be injected in place
#         of this placholder.
#         """
#         return self[0]
# 
#     def __repr__(self):
#         specification = self.specification
#         if not isinstance(specification, tuple):
#             specification = '({})'.format(specification)
#         return '<UnrealizedInjection{specification}>'.format(
#             specification=specification
#         )
# 
#     def __bool__(self):
#         return False
# 
#     def __nonzero__(self):
#         return False
# 
# def get_dependencies(factory):
#     """
#     This function inspects a function to find its arguments marked for
#     injection, either with :py:func:`inject()` decorator,
#     :py:class:`UnrealizedInjection` class of through Python 3 function
#     annotations.  If `factory` is a class, then its constructor is inspected.
# 
#     Returned dictionary is a mapping of::
# 
#         [argument index/name] -> [specification]
# 
#     For example, dependencies for function::
# 
#         @inject(ILogger, db=(IDBConnection, 'archive'))
#         def foo(log, db=None):
#             pass
# 
#     would be::
# 
#         {
#             0: ILogger,
#             'db': (IDBConnection, 'archive'),
#         }
# 
#     `Old-style classes`_ (from before Python 2.2) are not supported.
# 
#     .. _Old-style classes:
#         https://docs.python.org/2/reference/datamodel.html#new-style-and-classic-classes
#     """
#     if inspect.isclass(factory):
#         # If factory is a class we want to check constructor depdendencies.
#         if six.PY3:
#             init_check = inspect.isfunction
#         else:
#             init_check = inspect.ismethod
#         dependencies = {}
#         if hasattr(factory, '__init__') and init_check(factory.__init__):
#             dependencies.update(get_dependencies(factory.__init__))
#         if hasattr(factory, '__new__') and inspect.isfunction(factory.__new__):
#             dependencies.update(get_dependencies(factory.__new__))
#         return dependencies
#     elif inspect.isfunction(factory) or inspect.ismethod(factory):
#         function = factory
#     else:
#         raise TypeError("`factory` must be a class or a function.")
# 
#     if hasattr(function, '__injection__'):
#         # Function has precollected dependencies (happens when using `inject()`
#         # decorator. Nothing to do here.
#         return function.__injection__
# 
#     dependencies = {}
# 
#     def process_dependency_tuples(tuples):
#         for key, value in tuples:
#             if isinstance(value, UnrealizedInjection):
#                 dependencies[key] = value.specification
#     if six.PY3:
#         argument_specification = inspect.getfullargspec(function)
#         if argument_specification.kwonlydefaults:
#             process_dependency_tuples(
#                 six.iteritems(argument_specification.kwonlydefaults)
#             )
#         if argument_specification.annotations:
#             dependencies.update(argument_specification.annotations)
#     else:
#         argument_specification = inspect.getargspec(function)
#     if argument_specification.defaults:
#         process_dependency_tuples(zip(
#             reversed(argument_specification.args),
#             reversed(argument_specification.defaults)
#         ))
#     return dependencies


import unittest
from wiring.dependency import UnrealizedInjection, get_dependencies



class GetDependenciesTest(unittest.TestCase):

    def test_keyword_only_arguments(self):
        def function(foo, bar, somearg=UnrealizedInjection(11), *,
                     foobar=UnrealizedInjection('foo', 12), test=12,
                     other=UnrealizedInjection(42)):
            pass
        self.assertDictEqual(
            get_dependencies(function),
            {
                'somearg': 11,
                'foobar': ('foo', 12),
                'other': 42,
            }
        )

    def test_annotations_only(self):
        def function(foo, bar: 33, other_arg=5, somearg: 15 = None, *,
                other: 'foo' = 7, test=2):
            pass
        self.assertDictEqual(

# Path: wiring/dependency.py
# class UnrealizedInjection(tuple):
#     """
#     Instances of this class are placeholders that can be used as default values
#     for arguments to mark that they should be provided with injected
#     :term:`dependency`, without using the :py:func:`inject()` decorator. For
#     example::
# 
#         def __init__(self, db_connection=UnrealizedInjection(IDBConnection)):
#             if not db_connection:
#                 raise ValueError()
# 
#     Note that instances of this class always evaluate to `False` when converted
#     to boolean, to allow easy checking for dependencies that hasn't been
#     injected.
# 
#     Instances of this class are immutable, `as any default argument value in
#     Python should be
#     <http://docs.python-guide.org/en/latest/writing/gotchas/#mutable-default-arguments>`_.
# 
#     There's also an :py:data:`injected` shortcut for this class in this
#     package.
#     """
# 
#     __slots__ = []
# 
#     def __new__(cls, *specification):
#         """
#         You construct this class by giving it :term:`specification` elements.
#         For example, if your specification is::
# 
#             (IDBConnection, 'archive')
# 
#         then you can declare the :term:`dependency` like this::
# 
#             def foo(db=UnrealizedInjection(IDBConnection, 'archive')):
#                 pass
# 
#         When no specification is given to the class constructor,
#         a `ValueError` is raised.
# 
#         :raises:
#             ValueError
#         """
#         if not specification:
#             raise ValueError("No dependency specification given.")
#         if len(specification) == 1:
#             specification = specification[0]
#         else:
#             specification = tuple(specification)
#         return super(UnrealizedInjection, cls).__new__(
#             cls,
#             (specification,)
#         )
# 
#     @property
#     def specification(self):
#         """
#         A :term:`specification` of an object that should be injected in place
#         of this placholder.
#         """
#         return self[0]
# 
#     def __repr__(self):
#         specification = self.specification
#         if not isinstance(specification, tuple):
#             specification = '({})'.format(specification)
#         return '<UnrealizedInjection{specification}>'.format(
#             specification=specification
#         )
# 
#     def __bool__(self):
#         return False
# 
#     def __nonzero__(self):
#         return False
# 
# def get_dependencies(factory):
#     """
#     This function inspects a function to find its arguments marked for
#     injection, either with :py:func:`inject()` decorator,
#     :py:class:`UnrealizedInjection` class of through Python 3 function
#     annotations.  If `factory` is a class, then its constructor is inspected.
# 
#     Returned dictionary is a mapping of::
# 
#         [argument index/name] -> [specification]
# 
#     For example, dependencies for function::
# 
#         @inject(ILogger, db=(IDBConnection, 'archive'))
#         def foo(log, db=None):
#             pass
# 
#     would be::
# 
#         {
#             0: ILogger,
#             'db': (IDBConnection, 'archive'),
#         }
# 
#     `Old-style classes`_ (from before Python 2.2) are not supported.
# 
#     .. _Old-style classes:
#         https://docs.python.org/2/reference/datamodel.html#new-style-and-classic-classes
#     """
#     if inspect.isclass(factory):
#         # If factory is a class we want to check constructor depdendencies.
#         if six.PY3:
#             init_check = inspect.isfunction
#         else:
#             init_check = inspect.ismethod
#         dependencies = {}
#         if hasattr(factory, '__init__') and init_check(factory.__init__):
#             dependencies.update(get_dependencies(factory.__init__))
#         if hasattr(factory, '__new__') and inspect.isfunction(factory.__new__):
#             dependencies.update(get_dependencies(factory.__new__))
#         return dependencies
#     elif inspect.isfunction(factory) or inspect.ismethod(factory):
#         function = factory
#     else:
#         raise TypeError("`factory` must be a class or a function.")
# 
#     if hasattr(function, '__injection__'):
#         # Function has precollected dependencies (happens when using `inject()`
#         # decorator. Nothing to do here.
#         return function.__injection__
# 
#     dependencies = {}
# 
#     def process_dependency_tuples(tuples):
#         for key, value in tuples:
#             if isinstance(value, UnrealizedInjection):
#                 dependencies[key] = value.specification
#     if six.PY3:
#         argument_specification = inspect.getfullargspec(function)
#         if argument_specification.kwonlydefaults:
#             process_dependency_tuples(
#                 six.iteritems(argument_specification.kwonlydefaults)
#             )
#         if argument_specification.annotations:
#             dependencies.update(argument_specification.annotations)
#     else:
#         argument_specification = inspect.getargspec(function)
#     if argument_specification.defaults:
#         process_dependency_tuples(zip(
#             reversed(argument_specification.args),
#             reversed(argument_specification.defaults)
#         ))
#     return dependencies


# Path: tests/py3/dependency_tests.py
import unittest
from wiring.dependency import UnrealizedInjection, get_dependencies




class GetDependenciesTest(unittest.TestCase):

    def test_keyword_only_arguments(self):
        def function(foo, bar, somearg=UnrealizedInjection(11), *,
                     foobar=UnrealizedInjection('foo', 12), test=12,
                     other=UnrealizedInjection(42)):
            pass
        self.assertDictEqual(
            get_dependencies(function),
            {
                'somearg': 11,
                'foobar': ('foo', 12),
                'other': 42,
            }
        )

    def test_annotations_only(self):
        def function(foo, bar: 33, other_arg=5, somearg: 15 = None, *,
                other: 'foo' = 7, test=2):
            pass
        self.assertDictEqual(

            get_dependencies(function),