GitHub user felixcheung opened a pull request:
https://github.com/apache/spark/pull/16237
[SPARK-18807][SPARKR] Should suppress output print for calls to JVM methods
with void return values
## What changes were proposed in this pull request?
Several SparkR API calling into JVM methods that have void return values
are getting printed out, especially when running in a REPL or IDE.
example:
```
> setLogLevel("WARN")
NULL
```
We should fix this to make the result more clear.
## How was this patch tested?
manuall - I didn't find a expect_*() method in testthat for this
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/felixcheung/spark rinvis
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16237.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #16237
----
commit 9d8efafbbdfc79f2c8649bc1e5c4a1d7eccb73d0
Author: Felix Cheung <[email protected]>
Date: 2016-12-09T19:38:43Z
wrap calls with invisible
commit 75f56c858b02e5bc409c4a35686f56d7058985a9
Author: Felix Cheung <[email protected]>
Date: 2016-12-09T19:40:52Z
add test
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