Fix hasSession specifier

Author: VincentLanglet

src/Type/Symfony/RequestTypeSpecifyingExtension.php

@@ -46,10 +46,15 @@ public function specifyTypes(MethodReflection $methodReflection, MethodCall $nod
 	{
 		$classReflection = $this->broker->getClass(self::REQUEST_CLASS);
 		$methodVariants = $classReflection->getNativeMethod(self::GET_METHOD_NAME)->getVariants();
+		$returnType = ParametersAcceptorSelector::selectSingle($methodVariants)->getReturnType();
+
+		if (!TypeCombinator::containsNull($returnType)) {
+			return new SpecifiedTypes();
+		}
 
 		return $this->typeSpecifier->create(
 			new MethodCall($node->var, self::GET_METHOD_NAME),
-			TypeCombinator::removeNull(ParametersAcceptorSelector::selectSingle($methodVariants)->getReturnType()),
+			TypeCombinator::removeNull($returnType),
 			$context
 		);
 	}

tests/Type/Symfony/data/request_get_session.php

@@ -12,3 +12,7 @@
 if ($request->hasSession()) {
 	assertType(SessionInterface::class, $request->getSession());
 }
+
+if (!$request->hasSession()) {
+	assertType(SessionInterface::class, $request->getSession());
+}