Github user shivaram commented on the issue:
https://github.com/apache/spark/pull/14243
@sun-rui Thats a good point. Right now the test will be canceled if R is
not installed (from the line `assume(R.isInstalled)`. I also added a check to
make sure SparkR is installed in `SPARK_HOME/R/lib`. With this it cancels the
test but passes the entire test suite if SparkR isn't installed. It prints a
warning message which looks like
```
- include an external JAR in SparkR !!! CANCELED !!! (42 milliseconds)
[info] org.apache.spark.api.r.RUtils.isSparkRInstalled was false SparkR
is not installed in this build. (SparkSubmitSuite.scala:442)
```
@felixcheung Yeah thats the idea. CRAN will only run the R tests and not
the Scala ones.
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