ianmcook commented on a change in pull request #9423:
URL: https://github.com/apache/arrow/pull/9423#discussion_r574628901



##########
File path: r/tests/testthat/test-dplyr.R
##########
@@ -256,6 +262,29 @@ test_that("filter() with %in%", {
   )
 })
 
+test_that("filter() with string ops", {
+  expect_dplyr_equal(
+    input %>%
+      filter(dbl > 2, toupper(chr) %in% c("D", "F")) %>%
+      collect(),
+    tbl
+  )

Review comment:
       This test would pass without the changes in this PR. Do you want to try 
to test `toupper()` and `tolower()` in a way that would have failed before but 
succeeds now?




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