RFR: Initial section on testing

[Phil Race]

On Fri, 16 Oct 2020 15:58:52 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

> It's a start.

src/index.md line 339:

> 337:
> 338: In addition to your own Java applications, OpenJDK have support for two test frameworks, JTReg and GTest. JTReg is
> a Java regression test framework that is used for most of the tests that are included in the OpenJDK source repository.
> The Google Test (GTest) framework is intended for unit testing of the C++ native code. 339:

There's lots of C++ code in the JDK client - some of it shared, some of it windows specific. None of that is set up or
likely appropriate for gtest to test it so if you are thinking of hotspot C++ code may be you should say that ..

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PR: https://git.openjdk.java.net/guide/pull/30