Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/4334#issuecomment-72622789
Unfortunately, these tests dump a bunch of WARN noise into `unit-tests.log`:
```
15/02/03 01:51:04.047 pool-1-thread-1-ScalaTest-running-UISeleniumSuite
WARN DefaultCssErrorHandler: CSS error:
'http://localhost:56072/static/bootstrap.min.css' [874:7581] Error in media
list. (Invalid token "(". Was expecting one of: <S>, <IDENT>.)
15/02/03 01:51:04.052 pool-1-thread-1-ScalaTest-running-UISeleniumSuite
WARN DefaultCssErrorHandler: CSS error:
'http://localhost:56072/static/bootstrap.min.css' [874:13080] Error in media
list. (Invalid token "(". Was expecting one of: <S>, <IDENT>.)
15/02/03 01:51:04.053 pool-1-thread-1-ScalaTest-running-UISeleniumSuite
WARN DefaultCssErrorHandler: CSS error:
'http://localhost:56072/static/bootstrap.min.css' [874:15990] Error in media
list. (Invalid token "(". Was expecting one of: <S>, <IDENT>.)
15/02/03 01:51:04.059 pool-1-thread-1-ScalaTest-running-UISeleniumSuite
WARN DefaultCssErrorHandler: CSS error:
'http://localhost:56072/static/webui.css' [73:17] Error in style rule. (Invalid
token ":". Was expecting one of: <EOF>, <S>, <NUMBER>, "inherit", <IDENT>,
<STRING>, <PLUS>, <COMMA>, <HASH>, <IMPORTANT_SYM>, <EMS>, <EXS>, <LENGTH_PX>,
<LENGTH_CM>, <LENGTH_MM>, <LENGTH_IN>, <LENGTH_PT>, <LENGTH_PC>, <ANGLE_DEG>,
<ANGLE_RAD>, <ANGLE_GRAD>, <TIME_MS>, <TIME_S>, <FREQ_HZ>, <FREQ_KHZ>,
<PERCENTAGE>, <DIMENSION>, <URI>, <FUNCTION>, "}", ";", "/", "-".)
[...]
```
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