Refactoring of kwargs injecting

objects/decorators.py

@@ -3,6 +3,7 @@
 from six import wraps
 
 from .utils import ensure_is_injection
+from .utils import get_injectable_kwargs
 
 
 def override(catalog):
@@ -30,10 +31,10 @@ def inject(injection):
         @wraps(callback)
         def decorated(*args, **kwargs):
             """Decorated with dependency injection callback."""
-            for injection in getattr(decorated, '_injections'):
-                if injection.name not in kwargs:
-                    kwargs[injection.name] = injection.value
-            return callback(*args, **kwargs)
+            return callback(*args,
+                            **get_injectable_kwargs(kwargs,
+                                                    getattr(decorated,
+                                                            '_injections')))
 
         setattr(decorated, '_injections', (injection,))
 

objects/providers.py

@@ -6,6 +6,7 @@ from .utils import ensure_is_provider
 from .utils import is_kwarg_injection
 from .utils import is_attribute_injection
 from .utils import is_method_injection
+from .utils import get_injectable_kwargs
 
 from .errors import Error
 
@@ -118,12 +119,9 @@ class Factory(Provider):
 
     def _provide(self, *args, **kwargs):
         """Return provided instance."""
-        init_kwargs = dict(((injection.name, injection.value)
-                            for injection in self._kwargs))
-        init_kwargs.update(kwargs)
-
-        instance = self._provides(*args, **init_kwargs)
-
+        instance = self._provides(*args,
+                                  **get_injectable_kwargs(kwargs,
+                                                          self._kwargs))
         for attribute in self._attributes:
             setattr(instance, attribute.name, attribute.value)
         for method in self._methods:

objects/utils.py

@@ -49,3 +49,11 @@ def is_method_injection(instance):
     """Check if instance is method injection instance."""
     return (not isinstance(instance, class_types) and
             getattr(instance, '__IS_METHOD_INJECTION__', False) is True)
+
+
+def get_injectable_kwargs(kwargs, injections):
+    """Return dictionary of kwargs, patched with injections."""
+    init_kwargs = dict(((injection.name, injection.value)
+                        for injection in injections))
+    init_kwargs.update(kwargs)
+    return init_kwargs