From 9ae54ae42fc4b82aeeaccd4086a6483842fc462a Mon Sep 17 00:00:00 2001
From: Joris Van den Bossche <jorisvandenbossche@gmail.com>
Date: Thu, 11 Apr 2024 12:08:31 +0200
Subject: [PATCH] address feedback

---
 cpp/src/arrow/array/array_test.cc | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/cpp/src/arrow/array/array_test.cc b/cpp/src/arrow/array/array_test.cc
index e222d2b4e8f79..60efdb47683f4 100644
--- a/cpp/src/arrow/array/array_test.cc
+++ b/cpp/src/arrow/array/array_test.cc
@@ -1309,12 +1309,11 @@ TEST(TestBooleanArray, TrueCountFalseCount) {
   CheckArray(checked_cast<const BooleanArray&>(*arr->Slice(0, 0)));
 
   // GH-41016 true_count() with array without validity buffer with null_count of -1
-  auto data = ArrayFromJSON(boolean(), "[true, false, true]")->data();
-  data->null_count = -1;
-  auto arr_unknown_null_count = std::make_shared<BooleanArray>(data);
+  auto arr_unknown_null_count = ArrayFromJSON(boolean(), "[true, false, true]");
+  arr_unknown_null_count->data()->null_count = kUnknownNullCount;
   ASSERT_EQ(arr_unknown_null_count->data()->null_count.load(), -1);
   ASSERT_EQ(arr_unknown_null_count->null_bitmap(), nullptr);
-  ASSERT_EQ(arr_unknown_null_count->true_count(), 2);
+  ASSERT_EQ(checked_pointer_cast<BooleanArray>(arr_unknown_null_count)->true_count(), 2);
 }
 
 TEST(TestPrimitiveAdHoc, TestType) {