[GitHub] [arrow] ianmcook commented on a change in pull request #9958: ARROW-11328: [R] Collecting zero columns from a dataset returns entire dataset

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ianmcook commented on a change in pull request #9958:
URL: https://github.com/apache/arrow/pull/9958#discussion_r610610094



##########
File path: r/tests/testthat/test-dataset.R
##########
@@ -1767,3 +1767,13 @@ test_that("Dataset writing: unsupported features/input validation", {
     write_dataset(ds, tempfile(), basename_template = NULL)
   )
 })
+
+# see https://issues.apache.org/jira/browse/ARROW-11328
+test_that("Collecting zero columns from a dataset doesn't return entire dataset", {
+  tmp <- tempfile()

Review comment:
       Since this test writes and reads a Parquet file, we need to skip it if the Arrow C++ library was not built with Parquet
   ```suggestion
     skip_if_not_available("parquet")
     tmp <- tempfile()
   ```




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