westonpace commented on a change in pull request #9095:
URL: https://github.com/apache/arrow/pull/9095#discussion_r565979874
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File path: cpp/src/arrow/util/iterator_test.cc
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@@ -214,6 +255,270 @@ TEST(TestVectorIterator, RangeForLoop) {
ASSERT_EQ(ints_it, ints.end());
}
+template <typename T>
+Transformer<T, T> MakeFirstN(int n) {
+ int remaining = n;
+ return [remaining](T next) mutable -> Result<TransformFlow<T>> {
+ if (remaining > 0) {
+ remaining--;
+ return TransformYield(next);
+ }
+ return TransformFinish();
+ };
+}
+
+TEST(TestIteratorTransform, Truncating) {
Review comment:
I changed the tests to transform from `TestInt` to a newly created
`TestStr`
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