Test failure due to faulty data passed to Node.js streams

[BridgeAR]

Serialport is run in CITGM to verify that changes in Node.js do not break the module. Seems like serialport throws an error with the latest Node.js versions in one of the tests where faulty data is passed through to the streams API:

node-serialport/packages/bindings/lib/mocks/linux-list.js

Line 16 in c5ae5bd

stream.push(mockPorts)

The error is:

1) listLinux
        rejects on non-zero exit codes:
      Uncaught TypeError [ERR_INVALID_ARG_TYPE]: The "chunk" argument must be of type string or an instance of Buffer or Uint8Array. Received an instance of Object
       at readableAddChunk (_stream_readable.js:252:13)
       at Readable.push (_stream_readable.js:220:10)
       at Object.spawn (packages/bindings/lib/mocks/linux-list.js:2:568)
       at /Users/iojs/tmp/citgm_tmp/dda96ec3-a570-4a8c-a7f3-a5aca58438c6/serialport/packages/bindings/lib/linux-list.js:2:1585
       at new Promise (<anonymous>)
       at listLinux (packages/bindings/lib/linux-list.js:2:1442)
       at Context.<anonymous> (packages/bindings/lib/linux-list.test.js:118:18)
       at processImmediate (internal/timers.js:456:21)

It is unclear to me what data should be written to the stream. Maybe just use JSON.stringify(mockPorts) to pass a string to stream.write()?

[reconbot]

Fixed in #2079, it was the "null" value set on reset that it was complaining about.

[stale]

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