fix: templating while concatenating arrays (#42)

Author: brian-mulier

tzatziki-core/src/main/java/com/decathlon/tzatziki/steps/ObjectSteps.java

@@ -105,11 +105,11 @@ public class ObjectSteps {
                     if (arrayToConcat instanceof Collection<?> array) {
                         return array;
                     } else {
-                        return Mapper.<List<?>>read(arrayToConcat.toString(), List.class);
+                        return Mapper.<Collection<?>>read(arrayToConcat.toString(), List.class);
                     }
                 }).toList();
 
-                return collectionsToConcat.stream().flatMap(Collection::stream).collect(Collectors.toList());
+                return options.fn(collectionsToConcat.stream().flatMap(Collection::stream).collect(Collectors.toList()));
             });
 
     static {

tzatziki-core/src/test/resources/com/decathlon/tzatziki/steps/objects.feature

@@ -621,28 +621,31 @@ Feature: to interact with objects in the context
   Scenario: concatenate multiple arrays using handlebars helper
     Given that myFirstArray is:
     """
-    - firstItem
-    - secondItem
+    array:
+      - payload: firstItem
+      - payload: secondItem
     """
     And that mySecondArray is:
     """
-    - thirdItem
-    - fourthItem
+    - payload: thirdItem
+    - payload: fourthItem
     """
     And that myThirdArray is:
     """
-    - fifthItem
-    - sixthItem
+    - payload: fifthItem
+    - payload: sixthItem
     """
 
     When resultArray is:
     """
-    {{#concat myFirstArray mySecondArray myThirdArray}}
-      {{this}}
-    {{/concat}}
+    {
+      {{#concat [myFirstArray.array] mySecondArray myThirdArray}}
+      "myArray": {{this}}
+      {{/concat}}
+    }
     """
 
     Then resultArray is equal to:
     """
-    [firstItem, secondItem, thirdItem, fourthItem, fifthItem, sixthItem]
+    {"myArray": [{"payload":"firstItem"},{"payload":"secondItem"},{"payload":"thirdItem"},{"payload":"fourthItem"},{"payload":"fifthItem"},{"payload":"sixthItem"}]}
     """