Enzyme tests returning improper teardown error in Chart component.

[hydrotik]

Getting error:

A worker process has failed to exit gracefully and has been force exited. This is likely caused by tests leaking due to improper teardown. Try running with --runInBand --detectOpenHandles to find leaks.

Added:

"test": "jest --forceExit --runInBand --detectOpenHandles"

Attempting to garbage collect dom references.

Without --forceExit test hangs. Will try with leaked-handles

Implementing some solutions found here:
jestjs/jest#9473

[hydrotik]

Adding leaked-handles getting output of:

tcp stream {
  fd: 20,
  readable: false,
  writable: true,
  address: {},
  serverAddr: null
}

tcp stream {
  fd: 22,
  readable: false,
  writable: true,
  address: {},
  serverAddr: null
}