Add Callable.injections read-only attribute for getting a full list of Callable injections

dependency_injector/providers.py

@@ -264,6 +264,11 @@ class Callable(Provider):
         return self.callback(*_get_injectable_args(args, self.args),
                              **_get_injectable_kwargs(kwargs, self.kwargs))
 
+    @property
+    def injections(self):
+        """Return tuple of all injections."""
+        return self.args + self.kwargs
+
 
 class Config(Provider):
     """Config provider.

docs/main/changelog.rst

@@ -17,9 +17,13 @@ Development version
   examples.
 - Add functionality for using positional argument injections with 
   ``di.Factory``, ``di.Singleton`` and ``di.Callable`` providers.
+- Add functionality for decorating classes with ``@di.inject``.
+- Add ``di.Singleton.injections`` attribute that represents a tuple of all 
+  ``di.Singleton`` injections (including args, kwargs, attributes and methods).
+- Add ``di.Callable.injections`` attribute that represents a tuple of all 
+  ``di.Callable`` injections (including args and kwargs).
 - Add optimization for ``di.Injection.value`` property that will compute 
   type of injection once, instead of doing this on every call.
-- Add functionality for decorating classes with ``@di.inject``.
 - Add support of Python 3.5.
 - Add support of six 1.10.0.
 - Add minor refactorings and code style fixes.

tests/test_providers.py

@@ -755,6 +755,11 @@ class CallableTests(unittest.TestCase):
 
         self.assertTupleEqual(provider(), (1, 2, 3, 4))
 
+    def test_injections(self):
+        """Test getting a full list of injections using injections property."""
+        provider = di.Factory(self.example, 1, 2, arg3=3, arg4=4)
+        self.assertEquals(len(provider.injections), 4)
+
 
 class ConfigTests(unittest.TestCase):
     """Config test cases."""