yikf opened a new pull request #31510:
URL: https://github.com/apache/spark/pull/31510
### What changes were proposed in this pull request?
Currently, we pass the default value `EmptyRow` to method `checkEvaluation`
in the StringExpressionsSuite, but the default value of the 'checkEvaluation'
method parameter is the `emptyRow`.
We can clean the parameter for Code Simplifications.
### Why are the changes needed?
for Code Simplifications
**before**:
```
def testConcat(inputs: String*): Unit = {
val expected = if (inputs.contains(null)) null else inputs.mkString
checkEvaluation(Concat(inputs.map(Literal.create(_, StringType))),
expected, EmptyRow)
}
```
**after**:
```
def testConcat(inputs: String*): Unit = {
val expected = if (inputs.contains(null)) null else inputs.mkString
checkEvaluation(Concat(inputs.map(Literal.create(_, StringType))),
expected)
}
```
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Pass the Jenkins or Github action.
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