MQE-2575: Allow MFTF Helpers to Return Data to MFTF Test

 - fix static tests

Author: NadiyaS

dev/tests/functional/tests/MFTF/DevDocs/Helper/CustomHelper.php

@@ -46,4 +46,15 @@ public function goTo(
         print('$bla = ' . $bla . PHP_EOL);
         print('array $arraysomething = [' . implode(', ', $arraysomething) . ']' . PHP_EOL);
     }
+
+    /**
+     * Returns value of provided param $text
+     *
+     * @param string $text
+     * @return string
+     */
+    public function getText(string $text): string
+    {
+        return $text;
+    }
 }

dev/tests/functional/tests/MFTF/DevDocs/Test/DevDocsTest.xml

@@ -42,6 +42,14 @@
             <argument name="int">987</argument>
         </helper>
 
+        <helper class="\MFTF\DevDocs\Helper\CustomHelper" method="getText" stepKey="getText">
+            <argument name="text">some text</argument>
+        </helper>
+        <assertEquals stepKey="assertHelperReturnValue" message="Method getText of CustomHelper should return value which may be used as variable in test">
+            <expectedResult type="string">some text</expectedResult>
+            <actualResult type="variable">getText</actualResult>
+        </assertEquals>
+
         <actionGroup ref="HelperActionGroup" stepKey="actionGroupWithCustomHelper">
             <argument name="test" value="{{HelperData.entityField}}" />
             <argument name="entityTest" value="HelperData" />