Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/21255#discussion_r186368498
--- Diff: R/pkg/tests/fulltests/test_sparkSQL.R ---
@@ -1502,12 +1502,21 @@ test_that("column functions", {
result <- collect(select(df, sort_array(df[[1]])))[[1]]
expect_equal(result, list(list(1L, 2L, 3L), list(4L, 5L, 6L)))
- # Test flattern
+ result <- collect(select(df, reverse(df[[1]])))[[1]]
--- End diff --
Seems we don't have test for `reverse` for string. Can you add one for it
too?
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