pitrou commented on code in PR #46408:
URL: https://github.com/apache/arrow/pull/46408#discussion_r2110046285
##########
cpp/src/arrow/ipc/read_write_test.cc:
##########
@@ -579,6 +579,40 @@ TEST_F(TestIpcRoundTrip, SpecificMetadataVersion) {
TestMetadataVersion(MetadataVersion::V5);
}
+TEST_F(TestIpcRoundTrip, AlienSlice) {
+ // This tests serialization of a sliced ListArray that got sliced "the Rust
+ // way": by slicing the value_offsets buffer, but keeping top-level offset at
+ // 0.
+
+ // Values buffer [1, 2, 3, 4, 5]
+ TypedBufferBuilder<int32_t> values_builder;
+ ASSERT_OK(values_builder.Reserve(5));
+ for (int32_t i = 1; i <= 5; i++) {
+ ASSERT_OK(values_builder.Append(i));
+ }
+ ASSERT_OK_AND_ASSIGN(auto values_buffer, values_builder.Finish());
Review Comment:
The `ArrayData` you get can be used directly as the list's child data.
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