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• The builder will always
  • override → single value
  • complete the configuration parameters → list values
• Any closeable objects provided to a builder will still be closed once the client is closed, and as a result, a builder should only be used once. An exception will be thrown if build() is invoked multiple times.
• Any configurable object provided to a builder will be configured by the client after instantiation.

To finalize KIP-378, two new constructors will be added in the TopologyTestDriver as follow

public TopologyTestDriver(Topology topology, StreamsConfig config)
public TopologyTestDriver(Topology topology, StreamsConfig config, Instant initialWallClockTime) 

Compatibility, Deprecation, and Migration Plan

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