Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/9382#issuecomment-152691542
@yhuai, here's the source code of the failing test:
```scala
test("InputFileName") {
withTempPath { dir =>
val data = sparkContext.parallelize(0 to 10).toDF("id")
data.write.parquet(dir.getCanonicalPath)
val answer =
sqlContext.read.parquet(dir.getCanonicalPath).select(inputFileName())
.head.getString(0)
assert(answer.contains(dir.getCanonicalPath))
checkAnswer(data.select(inputFileName()).limit(1), Row(""))
}
}
```
Is the original assertion supposed to be checking that `inputFileName()`
returns an empty string for data frames that were created by `sc.parallelize()`?
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