mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-25 11:04:01 +03:00
Add smarter providers representation
This commit is contained in:
Roman Mogilatov
parent
9ef7a961f6
commit
7b611820c5
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@ -10,11 +10,13 @@ from .injections import _get_injectable_kwargs
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from .utils import ensure_is_provider
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from .utils import is_attribute_injection
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from .utils import is_method_injection
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from .utils import represent_provider
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from .utils import GLOBAL_LOCK
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from .errors import Error
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@six.python_2_unicode_compatible
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class Provider(object):
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"""Base provider class.
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@ -150,7 +152,17 @@ class Provider(object):
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"""
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return Delegate(self)
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def __str__(self):
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"""Return string representation of provider.
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:rtype: str
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"""
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return represent_provider(provider=self, provides=None)
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__repr__ = __str__
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@six.python_2_unicode_compatible
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class Delegate(Provider):
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""":py:class:`Delegate` provider delegates another provider.
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@ -173,6 +185,11 @@ class Delegate(Provider):
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:type delegated: :py:class:`Provider`
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"""
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self.delegated = ensure_is_provider(delegated)
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"""Delegated provider.
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:type: :py:class:`Provider`
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"""
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super(Delegate, self).__init__()
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def _provide(self, *args, **kwargs):
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@ -188,7 +205,17 @@ class Delegate(Provider):
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"""
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return self.delegated
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def __str__(self):
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"""Return string representation of provider.
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:rtype: str
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"""
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return represent_provider(provider=self, provides=self.delegated)
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__repr__ = __str__
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@six.python_2_unicode_compatible
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class Factory(Provider):
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""":py:class:`Factory` provider creates new instance on every call.
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@ -301,7 +328,17 @@ class Factory(Provider):
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return instance
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def __str__(self):
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"""Return string representation of provider.
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:rtype: str
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"""
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return represent_provider(provider=self, provides=self.provides)
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__repr__ = __str__
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@six.python_2_unicode_compatible
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class Singleton(Provider):
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""":py:class:`Singleton` provider returns same instance on every call.
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@ -425,7 +462,102 @@ class Singleton(Provider):
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self.instance = self.factory(*args, **kwargs)
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return self.instance
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def __str__(self):
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"""Return string representation of provider.
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:rtype: str
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"""
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return represent_provider(provider=self, provides=self.provides)
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__repr__ = __str__
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@six.python_2_unicode_compatible
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class Callable(Provider):
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""":py:class:`Callable` provider calls wrapped callable on every call.
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:py:class:`Callable` provider provides callable that is called on every
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provider call with some predefined dependency injections.
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:py:class:`Callable` syntax of passing injections is the same like
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:py:class:`Factory` one:
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.. code-block:: python
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some_function = Callable(some_function, 'arg1', 'arg2', arg3=3, arg4=4)
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result = some_function()
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"""
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__slots__ = ('callback', 'args', 'kwargs')
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def __init__(self, callback, *args, **kwargs):
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"""Initializer.
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:param provides: Wrapped callable.
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:type provides: callable
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:param args: Tuple of injections.
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:type args: tuple
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:param kwargs: Dictionary of injections.
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:type kwargs: dict
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"""
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if not callable(callback):
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raise Error('Callable expected, got {0}'.format(str(callback)))
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self.callback = callback
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"""Provided callable.
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:type: callable
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"""
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self.args = _parse_args_injections(args)
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"""Tuple of positional argument injections.
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:type: tuple[:py:class:`dependency_injector.injections.Arg`]
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"""
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self.kwargs = _parse_kwargs_injections(args, kwargs)
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"""Tuple of keyword argument injections.
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:type: tuple[:py:class:`dependency_injector.injections.KwArg`]
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"""
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super(Callable, self).__init__()
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@property
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def injections(self):
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"""Read-only tuple of all injections.
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:rtype: tuple[:py:class:`dependency_injector.injections.Injection`]
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"""
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return self.args + self.kwargs
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def _provide(self, *args, **kwargs):
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"""Return provided instance.
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:param args: Tuple of context positional arguments.
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:type args: tuple[object]
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:param kwargs: Dictionary of context keyword arguments.
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:type kwargs: dict[str, object]
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:rtype: object
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"""
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return self.callback(*_get_injectable_args(args, self.args),
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**_get_injectable_kwargs(kwargs, self.kwargs))
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def __str__(self):
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"""Return string representation of provider.
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:rtype: str
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"""
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return represent_provider(provider=self, provides=self.callback)
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__repr__ = __str__
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@six.python_2_unicode_compatible
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class ExternalDependency(Provider):
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""":py:class:`ExternalDependency` provider describes dependency interface.
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@ -490,11 +622,21 @@ class ExternalDependency(Provider):
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"""
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return self.override(provider)
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def __str__(self):
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"""Return string representation of provider.
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class StaticProvider(Provider):
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""":py:class:`StaticProvider` returns provided instance "as is".
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:rtype: str
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"""
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return represent_provider(provider=self, provides=self.instance_of)
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:py:class:`StaticProvider` is base implementation that provides exactly
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__repr__ = __str__
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@six.python_2_unicode_compatible
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class Static(Provider):
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""":py:class:`Static` provider returns provided instance "as is".
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:py:class:`Static` provider is base implementation that provides exactly
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the same as it got on input.
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"""
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@ -511,7 +653,7 @@ class StaticProvider(Provider):
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:type: object
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"""
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super(StaticProvider, self).__init__()
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super(Static, self).__init__()
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def _provide(self, *args, **kwargs):
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"""Return provided instance.
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@ -526,8 +668,21 @@ class StaticProvider(Provider):
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"""
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return self.provides
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def __str__(self):
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"""Return string representation of provider.
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class Class(StaticProvider):
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:rtype: str
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"""
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return represent_provider(provider=self, provides=self.provides)
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__repr__ = __str__
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StaticProvider = Static
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# Backward compatibility for versions < 1.11.1
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class Class(Static):
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""":py:class:`Class` returns provided class "as is".
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.. code-block:: python
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@ -537,7 +692,7 @@ class Class(StaticProvider):
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"""
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class Object(StaticProvider):
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class Object(Static):
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""":py:class:`Object` returns provided object "as is".
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.. code-block:: python
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@ -547,7 +702,7 @@ class Object(StaticProvider):
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"""
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class Function(StaticProvider):
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class Function(Static):
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""":py:class:`Function` returns provided function "as is".
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.. code-block:: python
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@ -557,7 +712,7 @@ class Function(StaticProvider):
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"""
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class Value(StaticProvider):
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class Value(Static):
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""":py:class:`Value` returns provided value "as is".
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.. code-block:: python
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@ -567,80 +722,7 @@ class Value(StaticProvider):
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"""
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class Callable(Provider):
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""":py:class:`Callable` provider calls wrapped callable on every call.
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:py:class:`Callable` provider provides callable that is called on every
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provider call with some predefined dependency injections.
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:py:class:`Callable` syntax of passing injections is the same like
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:py:class:`Factory` one:
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.. code-block:: python
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some_function = Callable(some_function, 'arg1', 'arg2', arg3=3, arg4=4)
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result = some_function()
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"""
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__slots__ = ('callback', 'args', 'kwargs')
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def __init__(self, callback, *args, **kwargs):
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"""Initializer.
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:param callback: Wrapped callable.
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:type callback: callable
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:param args: Tuple of injections.
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:type args: tuple
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:param kwargs: Dictionary of injections.
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:type kwargs: dict
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"""
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if not callable(callback):
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raise Error('Callable expected, got {0}'.format(str(callback)))
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self.callback = callback
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"""Wrapped callable.
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:type: callable
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"""
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self.args = _parse_args_injections(args)
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"""Tuple of positional argument injections.
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:type: tuple[:py:class:`dependency_injector.injections.Arg`]
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"""
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self.kwargs = _parse_kwargs_injections(args, kwargs)
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"""Tuple of keyword argument injections.
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:type: tuple[:py:class:`dependency_injector.injections.KwArg`]
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"""
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super(Callable, self).__init__()
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@property
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def injections(self):
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"""Read-only tuple of all injections.
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:rtype: tuple[:py:class:`dependency_injector.injections.Injection`]
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"""
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return self.args + self.kwargs
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def _provide(self, *args, **kwargs):
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"""Return provided instance.
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:param args: Tuple of context positional arguments.
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:type args: tuple[object]
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:param kwargs: Dictionary of context keyword arguments.
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:type kwargs: dict[str, object]
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:rtype: object
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"""
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return self.callback(*_get_injectable_args(args, self.args),
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**_get_injectable_kwargs(kwargs, self.kwargs))
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@six.python_2_unicode_compatible
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class Config(Provider):
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""":py:class:`Config` provider provide dict values.
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@ -702,7 +784,17 @@ class Config(Provider):
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"""
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self.value.update(value)
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def __str__(self):
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"""Return string representation of provider.
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:rtype: str
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"""
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return represent_provider(provider=self, provides=self.value)
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__repr__ = __str__
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@six.python_2_unicode_compatible
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class ChildConfig(Provider):
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""":py:class:`ChildConfig` provider provides value from :py:class:`Config`.
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@ -759,3 +851,13 @@ class ChildConfig(Provider):
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:rtype: object
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"""
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return self.root_config(self.parents)
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def __str__(self):
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"""Return string representation of provider.
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:rtype: str
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"""
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return represent_provider(provider=self,
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provides='.'.join(self.parents))
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__repr__ = __str__
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@ -188,3 +188,22 @@ def ensure_is_catalog_bundle(instance):
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raise Error('Expected catalog bundle instance, '
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'got {0}'.format(str(instance)))
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return instance
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def represent_provider(provider, provides):
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"""Return string representation of provider.
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:param provider: Provider object
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:type provider: :py:class:`dependency_injector.providers.Provider`
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:param provides: Object that provider provides
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:type provider: object
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:return: String representation of provider
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:rtype: str
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"""
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return '<{provider}({provides}) at {address}>'.format(
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provider='.'.join((provider.__class__.__module__,
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provider.__class__.__name__)),
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provides=repr(provides) if provides is not None else '',
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address=hex(id(provider)))
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@ -125,6 +125,12 @@ class ProviderTests(unittest.TestCase):
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self.assertFalse(self.provider.is_overridden)
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self.assertIsNone(self.provider.last_overriding)
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def test_repr(self):
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"""Test representation of provider."""
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self.assertEqual(repr(self.provider),
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'<dependency_injector.providers.'
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'Provider() at {0}>'.format(hex(id(self.provider))))
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class DelegateTests(unittest.TestCase):
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"""Delegate test cases."""
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@ -150,6 +156,14 @@ class DelegateTests(unittest.TestCase):
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self.assertIs(delegated1, self.delegated)
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self.assertIs(delegated2, self.delegated)
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def test_repr(self):
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"""Test representation of provider."""
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self.assertEqual(repr(self.delegate),
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'<dependency_injector.providers.'
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'Delegate({0}) at {1}>'.format(
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repr(self.delegated),
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hex(id(self.delegate))))
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class FactoryTests(unittest.TestCase):
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"""Factory test cases."""
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@ -356,6 +370,19 @@ class FactoryTests(unittest.TestCase):
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injections.Method('method2', 6))
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self.assertEquals(len(provider.injections), 6)
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def test_repr(self):
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"""Test representation of provider."""
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provider = providers.Factory(Example,
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injections.KwArg('init_arg1',
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providers.Factory(dict)),
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injections.KwArg('init_arg2',
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providers.Factory(list)))
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self.assertEqual(repr(provider),
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'<dependency_injector.providers.'
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'Factory({0}) at {1}>'.format(
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repr(Example),
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hex(id(provider))))
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class SingletonTests(unittest.TestCase):
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"""Singleton test cases."""
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@ -606,89 +633,20 @@ class SingletonTests(unittest.TestCase):
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self.assertIsNot(instance1, instance2)
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class ExternalDependencyTests(unittest.TestCase):
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"""ExternalDependency test cases."""
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def setUp(self):
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"""Set test cases environment up."""
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self.provider = providers.ExternalDependency(instance_of=list)
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def test_init_with_not_class(self):
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"""Test creation with not a class."""
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self.assertRaises(errors.Error, providers.ExternalDependency, object())
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def test_is_provider(self):
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"""Test `is_provider` check."""
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self.assertTrue(utils.is_provider(self.provider))
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def test_call_overridden(self):
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"""Test call of overridden external dependency."""
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self.provider.provided_by(providers.Factory(list))
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self.assertIsInstance(self.provider(), list)
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def test_call_overridden_but_not_instance_of(self):
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"""Test call of overridden external dependency, but not instance of."""
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self.provider.provided_by(providers.Factory(dict))
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self.assertRaises(errors.Error, self.provider)
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def test_call_not_overridden(self):
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"""Test call of not satisfied external dependency."""
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self.assertRaises(errors.Error, self.provider)
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class StaticProvidersTests(unittest.TestCase):
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"""Static providers test cases."""
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def test_is_provider(self):
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"""Test `is_provider` check."""
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self.assertTrue(utils.is_provider(providers.Class(object)))
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self.assertTrue(utils.is_provider(providers.Object(object())))
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self.assertTrue(utils.is_provider(providers.Function(map)))
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self.assertTrue(utils.is_provider(providers.Value(123)))
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def test_call_class_provider(self):
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"""Test Class provider call."""
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self.assertIs(providers.Class(dict)(), dict)
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def test_call_object_provider(self):
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"""Test Object provider call."""
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obj = object()
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self.assertIs(providers.Object(obj)(), obj)
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def test_call_function_provider(self):
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"""Test Function provider call."""
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self.assertIs(providers.Function(map)(), map)
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def test_call_value_provider(self):
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"""Test Value provider call."""
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self.assertEqual(providers.Value(123)(), 123)
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def test_call_overridden_class_provider(self):
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"""Test overridden Class provider call."""
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cls_provider = providers.Class(dict)
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cls_provider.override(providers.Object(list))
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self.assertIs(cls_provider(), list)
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def test_call_overridden_object_provider(self):
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"""Test overridden Object provider call."""
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obj1 = object()
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obj2 = object()
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obj_provider = providers.Object(obj1)
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obj_provider.override(providers.Object(obj2))
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self.assertIs(obj_provider(), obj2)
|
||||
|
||||
def test_call_overridden_function_provider(self):
|
||||
"""Test overridden Function provider call."""
|
||||
function_provider = providers.Function(len)
|
||||
function_provider.override(providers.Function(sum))
|
||||
self.assertIs(function_provider(), sum)
|
||||
|
||||
def test_call_overridden_value_provider(self):
|
||||
"""Test overridden Value provider call."""
|
||||
value_provider = providers.Value(123)
|
||||
value_provider.override(providers.Value(321))
|
||||
self.assertEqual(value_provider(), 321)
|
||||
def test_repr(self):
|
||||
"""Test representation of provider."""
|
||||
provider = providers.Singleton(Example,
|
||||
injections.KwArg(
|
||||
'init_arg1',
|
||||
providers.Factory(dict)),
|
||||
injections.KwArg(
|
||||
'init_arg2',
|
||||
providers.Factory(list)))
|
||||
self.assertEqual(repr(provider),
|
||||
'<dependency_injector.providers.'
|
||||
'Singleton({0}) at {1}>'.format(
|
||||
repr(Example),
|
||||
hex(id(provider))))
|
||||
|
||||
|
||||
class CallableTests(unittest.TestCase):
|
||||
|
|
@ -780,6 +738,150 @@ class CallableTests(unittest.TestCase):
|
|||
provider = providers.Callable(self.example, 1, 2, arg3=3, arg4=4)
|
||||
self.assertEquals(len(provider.injections), 4)
|
||||
|
||||
def test_repr(self):
|
||||
"""Test representation of provider."""
|
||||
provider = providers.Callable(self.example,
|
||||
injections.KwArg(
|
||||
'arg1',
|
||||
providers.Factory(dict)),
|
||||
injections.KwArg(
|
||||
'arg2',
|
||||
providers.Factory(list)),
|
||||
injections.KwArg(
|
||||
'arg3',
|
||||
providers.Factory(set)),
|
||||
injections.KwArg(
|
||||
'arg4',
|
||||
providers.Factory(tuple)))
|
||||
self.assertEqual(repr(provider),
|
||||
'<dependency_injector.providers.'
|
||||
'Callable({0}) at {1}>'.format(
|
||||
repr(self.example),
|
||||
hex(id(provider))))
|
||||
|
||||
|
||||
class ExternalDependencyTests(unittest.TestCase):
|
||||
"""ExternalDependency test cases."""
|
||||
|
||||
def setUp(self):
|
||||
"""Set test cases environment up."""
|
||||
self.provider = providers.ExternalDependency(instance_of=list)
|
||||
|
||||
def test_init_with_not_class(self):
|
||||
"""Test creation with not a class."""
|
||||
self.assertRaises(errors.Error, providers.ExternalDependency, object())
|
||||
|
||||
def test_is_provider(self):
|
||||
"""Test `is_provider` check."""
|
||||
self.assertTrue(utils.is_provider(self.provider))
|
||||
|
||||
def test_call_overridden(self):
|
||||
"""Test call of overridden external dependency."""
|
||||
self.provider.provided_by(providers.Factory(list))
|
||||
self.assertIsInstance(self.provider(), list)
|
||||
|
||||
def test_call_overridden_but_not_instance_of(self):
|
||||
"""Test call of overridden external dependency, but not instance of."""
|
||||
self.provider.provided_by(providers.Factory(dict))
|
||||
self.assertRaises(errors.Error, self.provider)
|
||||
|
||||
def test_call_not_overridden(self):
|
||||
"""Test call of not satisfied external dependency."""
|
||||
self.assertRaises(errors.Error, self.provider)
|
||||
|
||||
def test_repr(self):
|
||||
"""Test representation of provider."""
|
||||
self.assertEqual(repr(self.provider),
|
||||
'<dependency_injector.providers.'
|
||||
'ExternalDependency({0}) at {1}>'.format(
|
||||
repr(list),
|
||||
hex(id(self.provider))))
|
||||
|
||||
|
||||
class StaticProvidersTests(unittest.TestCase):
|
||||
"""Static providers test cases."""
|
||||
|
||||
def test_is_provider(self):
|
||||
"""Test `is_provider` check."""
|
||||
self.assertTrue(utils.is_provider(providers.Class(object)))
|
||||
self.assertTrue(utils.is_provider(providers.Object(object())))
|
||||
self.assertTrue(utils.is_provider(providers.Function(map)))
|
||||
self.assertTrue(utils.is_provider(providers.Value(123)))
|
||||
|
||||
def test_call_class_provider(self):
|
||||
"""Test Class provider call."""
|
||||
self.assertIs(providers.Class(dict)(), dict)
|
||||
|
||||
def test_call_object_provider(self):
|
||||
"""Test Object provider call."""
|
||||
obj = object()
|
||||
self.assertIs(providers.Object(obj)(), obj)
|
||||
|
||||
def test_call_function_provider(self):
|
||||
"""Test Function provider call."""
|
||||
self.assertIs(providers.Function(map)(), map)
|
||||
|
||||
def test_call_value_provider(self):
|
||||
"""Test Value provider call."""
|
||||
self.assertEqual(providers.Value(123)(), 123)
|
||||
|
||||
def test_call_overridden_class_provider(self):
|
||||
"""Test overridden Class provider call."""
|
||||
cls_provider = providers.Class(dict)
|
||||
cls_provider.override(providers.Object(list))
|
||||
self.assertIs(cls_provider(), list)
|
||||
|
||||
def test_call_overridden_object_provider(self):
|
||||
"""Test overridden Object provider call."""
|
||||
obj1 = object()
|
||||
obj2 = object()
|
||||
obj_provider = providers.Object(obj1)
|
||||
obj_provider.override(providers.Object(obj2))
|
||||
self.assertIs(obj_provider(), obj2)
|
||||
|
||||
def test_call_overridden_function_provider(self):
|
||||
"""Test overridden Function provider call."""
|
||||
function_provider = providers.Function(len)
|
||||
function_provider.override(providers.Function(sum))
|
||||
self.assertIs(function_provider(), sum)
|
||||
|
||||
def test_call_overridden_value_provider(self):
|
||||
"""Test overridden Value provider call."""
|
||||
value_provider = providers.Value(123)
|
||||
value_provider.override(providers.Value(321))
|
||||
self.assertEqual(value_provider(), 321)
|
||||
|
||||
def test_repr(self):
|
||||
"""Test representation of provider."""
|
||||
class_provider = providers.Class(object)
|
||||
self.assertEqual(repr(class_provider),
|
||||
'<dependency_injector.providers.'
|
||||
'Class({0}) at {1}>'.format(
|
||||
repr(object),
|
||||
hex(id(class_provider))))
|
||||
|
||||
some_object = object()
|
||||
object_provider = providers.Object(some_object)
|
||||
self.assertEqual(repr(object_provider),
|
||||
'<dependency_injector.providers.'
|
||||
'Object({0}) at {1}>'.format(
|
||||
repr(some_object),
|
||||
hex(id(object_provider))))
|
||||
|
||||
function_provider = providers.Function(map)
|
||||
self.assertEqual(repr(function_provider),
|
||||
'<dependency_injector.providers.'
|
||||
'Function({0}) at {1}>'.format(
|
||||
repr(map),
|
||||
hex(id(function_provider))))
|
||||
|
||||
value_provider = providers.Value(123)
|
||||
self.assertEqual(repr(value_provider),
|
||||
'<dependency_injector.providers.'
|
||||
'Value({0}) at {1}>'.format(
|
||||
repr(123),
|
||||
hex(id(value_provider))))
|
||||
|
||||
|
||||
class ConfigTests(unittest.TestCase):
|
||||
"""Config test cases."""
|
||||
|
|
@ -842,3 +944,18 @@ class ConfigTests(unittest.TestCase):
|
|||
self.provider = providers.Config()
|
||||
category_setting = self.provider.category.setting
|
||||
self.assertRaises(errors.Error, category_setting)
|
||||
|
||||
def test_repr(self):
|
||||
"""Test representation of provider."""
|
||||
self.assertEqual(repr(self.provider),
|
||||
'<dependency_injector.providers.'
|
||||
'Config({0}) at {1}>'.format(
|
||||
repr(self.initial_data),
|
||||
hex(id(self.provider))))
|
||||
|
||||
category_setting = self.provider.category.setting
|
||||
self.assertEqual(repr(category_setting),
|
||||
'<dependency_injector.providers.'
|
||||
'ChildConfig({0}) at {1}>'.format(
|
||||
repr('.'.join(('category', 'setting'))),
|
||||
hex(id(category_setting))))
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user