jonkeane commented on a change in pull request #12567:
URL: https://github.com/apache/arrow/pull/12567#discussion_r824282914
##########
File path: r/tests/testthat/test-record-batch-reader.R
##########
@@ -157,3 +157,31 @@ test_that("reader head method edge cases", {
expect_equal(head(reader, 0), Table$create(x = integer(0), y = character(0)))
expect_equal(head(reader, 100), Table$create(batch, batch))
})
+
+test_that("RBR methods", {
+ batch <- record_batch(
+ x = 1:10,
+ y = letters[1:10]
+ )
+ sink <- BufferOutputStream$create()
+ writer <- RecordBatchStreamWriter$create(sink, batch$schema)
+ writer$write(batch)
+ writer$write(batch)
+ writer$close()
+ buf <- sink$finish()
+
+ reader <- RecordBatchStreamReader$create(buf)
+ expect_output(
+ print(reader),
+ "RecordBatchStreamReader
+x: int32
+y: string"
+ )
Review comment:
I will say, this kind of test is a good usecase for `expect_snapshot()`.
We don't need to change it, but it makes looking at the output much nicer than
dealing with embedded newlines + tabs.
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