RFR: 8242652: Throw SkippedException if no JS engine availabe in TestSearchScript

[Hannes Wallnöfer]

On Tue, 24 Nov 2020 15:08:27 GMT, Hannes Wallnöfer <hannesw at openjdk.org> wrote:

> This is a simple change to throw jtreg.SkippedException if no JavaScript engine is available to run the TestSearchScript test. In my previous attempt I tried to use the SkippedException class already present elsewhere in the test tree, not realizing I couuld just copy/create the exception in the javadoc test library.
> 
> Note that while the test is skipped correctly if no JS engine is available, the test will currently fail in the presence of a JS engine such as GraalJS. This is fixed by JDK-8244535.

> @hns, why did you decide to duplicate that exception locally instead of using it as a dependency?

The exception class is available in test/lib but I couldn't make the test see and use that class. I tried all combinations of paths (relative to the test class, relative to the repository root, etc). I think it's the correct solution to add the class to the lib folder of the javadoc tests. 

BTW jtreg doesn't provide this class, it is meant to be defined in test library code as described here: https://github.com/openjdk/jtreg/blob/master/src/share/doc/javatest/regtest/faq.md#what-if-a-test-does-not-apply-in-a-given-situation

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PR: https://git.openjdk.java.net/jdk/pull/1412