Learning Akka (Video 30)

The video tutorial covers various methods for testing streams, including simple sources, sinks, and flows, as well as using actors and the Acestream Test Kit. It provides practical examples and explanations for each method, demonstrating how to test different components of a stream application effectively.

What is the expected result when a simple source from 1 to 4 is run with a sink that sums elements?

• 20

• 15

• 10

• 5

How many groups are formed when a source from 1 to 10 is grouped by 2?

• 2

• 3

• 10

• 5

What is the result of a flow that filters numbers less than 5 from a source of 1 to 10?

• 1 to 3

• 1 to 4

• 5 to 10

• All numbers

What is the purpose of a test probe in actor-based stream testing?

• To sum elements

• To generate streams

• To receive results

• To cancel streams

What message is expected after cancelling a runnable in actor testing?

• Start message

• Error message

• Pause message

• Complete message

What does the Acestream Test Kit provide for testing?

• Test streams

• Test flows

• Test sources and sinks

• Test actors

What operation is performed on a source containing 4 elements in the Acestream Test Kit?

• Add and remove

• Multiply and subtract

• Filter and map

• Sum and divide