Fix port data for iterators

Author: maschmann

lib/PhpFlo/Test/ComponentTestHelperTrait.php

@@ -62,7 +62,7 @@ protected function connectOutPorts(ComponentInterface $component) : ComponentInt
                 ->willReturnCallback(
                     \Closure::bind(
                         function ($data) {
-                            $this->data = $data;
+                            $this->data[] = $data;
                         },
                         $socket
                     )

tests/PhpFlo/Component/CounterTest.php

@@ -34,6 +34,7 @@ public function testBehavior()
 
         $counter->sendCount();
 
-        $this->assertEquals(3, $this->getOutPortData('count'));
+        $countData = $this->getOutPortData('count');
+        $this->assertEquals(3, $countData[0]);
     }
 }