[JAXP] RFR: 8173602: TESTBUG: javax/xml/jaxp/unittest/transform/TransformerTest.java needs refactoring

[Langer, Christoph]

Hi,

please review a test fix for javax/xml/jaxp/unittest/transform/TransformerTest.java:
Bug: https://bugs.openjdk.java.net/browse/JDK-8173602
Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8173602.0/

The main motivation for this refactoring is to remove the dependency to the JDK internal classes com.sun.org.apache.xml.internal.serialize.OutputFormat and com.sun.org.apache.xml.internal.serialize.XMLSerializer.

Generally, TransformerTest.java contains several subtests which do similar things (test XALAN transformations) but the implementations differ. I created a common template with helper methods which all tests take advantage of now. I also introduced data sources to some tests to make them more readable and adaptable.

Thanks
Christoph