RFR: Initial section on testing [v2]

[Jesper Wilhelmsson]

On Mon, 19 Oct 2020 21:17:35 GMT, Igor Ignatyev <iignatyev at openjdk.org> wrote:

>> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Updates suggested by Phil and Igor
>
> src/index.md line 441:
> 
>> 439:     EXPECT_GT(val1, val2);
>> 440:     EXPECT_GE(val1, val2);
>> 441:     EXPECT_STREQ(expected_str, actual_str);
> 
> do we really need to list these guys here? referring to google test documentations seems to be enough.
> 
> in case there is a good reason to have this list here, `ASSERT_TRUE` and `ASSERT_FALSE` can be removed b/c the
> following paragraph explains that all these macros have an `ASSERT` variant.

Agreed. I wanted to have just a couple but couldn't choose which ones :-)
I have removed most but kept a few just to have some examples to talk about.

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