The TestTooManyEntries test was originally added in JDK-8272746 to validate that ZIP64 files with a total CEN size exceeding what ZipFile supports are rejected with a ZipException. The test does this by creating a large ZIP file (several gigabytes) with many enties. Because this is resource intensive, the test is currently tagged as manual. (See #6927)

It would be useful to have a test which asserts the CEN size enforcement, but without the CPU, disk, memory and run time requirements of TestTooManyEntries.