Fix: incorrect array element validation in SegmentType (#23289)

api/core/variables/types.py

         elif array_validation == ArrayValidation.FIRST:
             return element_type.is_valid(value[0])
         else:
-            return all([element_type.is_valid(i, array_validation=ArrayValidation.NONE)] for i in value)
+            return all(element_type.is_valid(i, array_validation=ArrayValidation.NONE) for i in value)
 
     def is_valid(self, value: Any, array_validation: ArrayValidation = ArrayValidation.FIRST) -> bool:
         """
 
 
 _ARRAY_ELEMENT_TYPES_MAPPING: Mapping[SegmentType, SegmentType] = {
-    # ARRAY_ANY does not have correpond element type.
+    # ARRAY_ANY does not have corresponding element type.
     SegmentType.ARRAY_STRING: SegmentType.STRING,
     SegmentType.ARRAY_NUMBER: SegmentType.NUMBER,
     SegmentType.ARRAY_OBJECT: SegmentType.OBJECT,

api/tests/unit_tests/core/variables/test_segment_type.py

-from core.variables.types import SegmentType
+from core.variables.types import ArrayValidation, SegmentType
 
 
 class TestSegmentTypeIsArrayType:
         value is tested for the is_array_type method.
         """
         # Arrange
-        all_segment_types = set(SegmentType)
         expected_array_types = [
             SegmentType.ARRAY_ANY,
             SegmentType.ARRAY_STRING,
         for seg_type in enum_values:
             is_array = seg_type.is_array_type()
             assert isinstance(is_array, bool), f"is_array_type does not return a boolean for segment type {seg_type}"
+
+
+class TestSegmentTypeIsValidArrayValidation:
+    """
+    Test SegmentType.is_valid with array types using different validation strategies.
+    """
+
+    def test_array_validation_all_success(self):
+        value = ["hello", "world", "foo"]
+        assert SegmentType.ARRAY_STRING.is_valid(value, array_validation=ArrayValidation.ALL)
+
+    def test_array_validation_all_fail(self):
+        value = ["hello", 123, "world"]
+        # Should return False, since 123 is not a string
+        assert not SegmentType.ARRAY_STRING.is_valid(value, array_validation=ArrayValidation.ALL)
+
+    def test_array_validation_first(self):
+        value = ["hello", 123, None]
+        assert SegmentType.ARRAY_STRING.is_valid(value, array_validation=ArrayValidation.FIRST)
+
+    def test_array_validation_none(self):
+        value = [1, 2, 3]
+        # validation is None, skip
+        assert SegmentType.ARRAY_STRING.is_valid(value, array_validation=ArrayValidation.NONE)