test: ensure stream preprocessing order
Checklist
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make -j4 test
(UNIX), orvcbuild test nosign
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
test
Description of change
Sometimes it is necessary to preprocess some initial bit of a stream data before giving the entire stream to the main processing function. Sometimes this bit should be extracted from the stream before the main processing; sometimes it should be returned to the stream. This test checks an order of stream modes, methods and events for a possible preprocessing algorithm. Stream BOM stripping is selected as a use case.
See https://github.com/nodejs/help/issues/221 as the prehistory.