Updated `DatagramSocketMulticasting` to use Junit and also hardened the test to avoid occasional interference from other tests.
- Test now uses Junit Assertions, in general if the assertion used had been `assertTrue(foo==bar)` I replaced it with `assertEquals(foo,bar)` though there are some cases where I used `assertTrue` or `assertFalse` - `testSendReceive` now retries up to 3 times if a message from an unexpected port is received - Both `testSendReceive` and `testSendNoReceive` both have messages that use the methods name instead of just "hello" Ran tiers 1-3 of tests as well as running this updated test to make sure it was stable ------------- Commit messages: - retry when a stray message is received - updated test to use Junit, also changed body of tests to be unqiue Changes: https://git.openjdk.org/jdk/pull/12513/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12513&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8301701 Stats: 59 lines in 1 file changed: 17 ins; 20 del; 22 mod Patch: https://git.openjdk.org/jdk/pull/12513.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12513/head:pull/12513 PR: https://git.openjdk.org/jdk/pull/12513
