RFR: 8375712: Convert java/lang/runtime tests to use JUnit [v2]

[Jan Lahoda]

On Wed, 21 Jan 2026 19:51:56 GMT, Johannes Döbler <duke at openjdk.org> wrote:

>> Jan Lahoda has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.
>
> test/jdk/java/lang/runtime/ExactnessConversionsSupportTest.java line 64:
> 
>> 62:     @Test
>> 63:     public void testByte() {
>> 64:         assertEquals(true,  ExactConversionsSupport.isIntToByteExact((byte) (Byte.MAX_VALUE)));
> 
> could be shortened to assertTrue(Exact...)``

I took a look at the test, and it seems to me it was written like this intentionally, and that it makes it more obvious what is happening here. This is not a simple assert that something worked (or did not work). This asserts that the return value is exactly this. There's no real difference, of course, but the intent is slightly different.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29350#discussion_r2720058203