Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/13721#discussion_r67457504
--- Diff: R/pkg/inst/tests/testthat/test_sparkSQL.R ---
@@ -2264,6 +2264,14 @@ test_that("createDataFrame sqlContext parameter
backward compatibility", {
expect_equal(collect(before), collect(after))
})
+test_that("randomSplit", {
+ df <- createDataFrame(data.frame(id = 1:1000))
+ df_list <- randomSplit(df, c(2, 3, 5))
+ expect_equal(1000, sum(sapply(df_list, count)))
+ df_list <- randomSplit(df, c(2, 3, 5), 0)
+ expect_equal(1000, sum(sapply(df_list, count)))
--- End diff --
for the seeded version it will be good to add some test on how many
elements should be present in each data frame (i.e. checking if the ratios are
0.2, 0.3 and 0.5 approximately)
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