Autowire dependencies using autowired registrations instead of letting the container handle it

This fixes known issue "Resolving a class registered by supertype..."

README.md

@@ -37,7 +37,7 @@ void main() {
 	auto container = DependencyContainer.getInstance();
 	container.register!DataWriter;
 	container.register!(Database, RelationalDatabase);
-	
+
 	auto writer = container.resolve!DataWriter;
 }
 ```
@@ -79,7 +79,7 @@ With dependency scopes, you can control how a dependency is resolved. The scope
 * Resolve a dependency using a single instance (default):
 
 ```d
-container.register!(ExampleClass).singleInstance(); 
+container.register!(ExampleClass).singleInstance();
 ```
 * Resolve a dependency with a new instance each time it is resolved:
 
@@ -141,7 +141,7 @@ If you registered multiple concrete types to the same supertype and you do not r
 
 Known issues
 ------------
-* Resolving a class registered by supertype or interface will only autowire the members inherited from its supertypes and in the case of interfaces none at all. To work around this issue, use a qualifier. Alternatively you could immediately resolve all registrations once by qualifiers after registering everything. See "[Registering and resolving using qualifiers](#Registering and resolving using qualifiers)".
+None! Found one? Let us know on github.
 
 Future Work
 -----------

source/poodinis/container.d

@@ -61,7 +61,7 @@ class DependencyContainer {
 			}
 		}
 
-		Registration newRegistration = new Registration(registeredType, concreteType);
+		AutowiredRegistration!ConcreteType newRegistration = new AutowiredRegistration!ConcreteType(registeredType, this);
 		newRegistration.singleInstance();
 		registrations[registeredType] ~= newRegistration;
 		return newRegistration;
@@ -95,12 +95,16 @@ class DependencyContainer {
 		}
 
 		Registration registration = getQualifiedRegistration(resolveType, qualifierType, *candidates);
-		QualifierType instance = cast(QualifierType) registration.getInstance();
+		QualifierType instance;
 
 		if (!autowireStack.canFind(registration)) {
 			autowireStack ~= registration;
-			this.autowire!(QualifierType)(instance);
+			instance = cast(QualifierType) registration.getInstance(new AutowireInstantiationContext());
 			autowireStack.popBack();
+		} else {
+			auto autowireContext = new AutowireInstantiationContext();
+			autowireContext.autowireInstance = false;
+			instance = cast(QualifierType) registration.getInstance(autowireContext);
 		}
 
 		return instance;

test/poodinis/containertest.d

@@ -90,6 +90,11 @@ version(unittest) {
 	class Red : Color {
 	}
 
+	class Spiders {
+		@Autowire
+		public TestInterface testMember;
+	}
+
 	// Test register concrete type
 	unittest {
 		auto container = new DependencyContainer();
@@ -242,15 +247,16 @@ version(unittest) {
 		assert(ittie.bittie.banana.bittie.banana is null, "Autowiring deep dependencies with newInstance scope autowired a reoccuring type.");
 	}
 
-	// Test autowiring type registered by interface fails (BUG test case)
+	// Test autowiring type registered by interface
 	unittest {
 		auto container = new DependencyContainer();
 		container.register!Banana;
+		container.register!Bittie;
 		container.register!(SuperInterface, SuperImplementation);
 
 		SuperImplementation superInstance = cast(SuperImplementation) container.resolve!SuperInterface;
 
-		assert(superInstance.banana is null, "Autowire instance which was resolved by interface type, which was not expected to be possible");
+		assert(!(superInstance.banana is null), "Instance which was resolved by interface type was not autowired.");
 	}
 
 	// Test reusing a container after clearing all registrations
@@ -316,4 +322,15 @@ version(unittest) {
 		assert(blueInstance !is null, "Resolved blue instance to null");
 		assert(redInstance !is null, "Resolved red instance to null");
 	}
+
+	// Test autowire of unqualified member typed by interface.
+	unittest {
+		auto container = new DependencyContainer();
+		container.register!Spiders;
+		container.register!(TestInterface, TestClass);
+
+		auto instance = container.resolve!Spiders;
+
+		assert(!(instance is null), "Container failed to autowire member by interface");
+	}
 }