bkietz commented on a change in pull request #8894:
URL: https://github.com/apache/arrow/pull/8894#discussion_r545414598
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File path: cpp/src/arrow/array/array_struct_test.cc
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@@ -582,4 +583,39 @@ TEST_F(TestStructBuilder, TestSlice) {
ASSERT_EQ(list_field->null_count(), 1);
}
+TEST(TestFieldRef, GetChildren) {
+ auto struct_array = ArrayFromJSON(struct_({field("a", float64())}), R"([
+ {"a": 6.125},
+ {"a": 0.0},
+ {"a": -1}
+ ])");
+
+ ASSERT_OK_AND_ASSIGN(auto a, FieldRef("a").GetOne(*struct_array));
+ auto expected_a = ArrayFromJSON(float64(), "[6.125, 0.0, -1]");
+ AssertArraysEqual(*a, *expected_a);
+
+ auto ToChunked = [struct_array](int64_t midpoint) {
+ return ChunkedArray(
+ ArrayVector{
+ struct_array->Slice(0, midpoint),
+ struct_array->Slice(midpoint),
+ },
+ struct_array->type());
+ };
+ AssertChunkedEquivalent(ToChunked(1), ToChunked(2));
Review comment:
This was just to ensure FieldRef::GetOne functions correctly with
chunked arrays
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