[FIXED] How to Cover code written inside taskExecutor.execute(new Runnable..) using junit5

Issue

Want to write junit5 test case/coverage for code inside execute method as below are my sample(dummy) src class, actual methods contains project lot of business logic.

If i mock the taskExecutor, it bypass whole execute() with dummy values.

Any suggestion how can i cover run method in attached code, Below are sample test case

Solution

You can outsource your in-lined Runnable to its own class like:

public class MyRunnable implements Runnable {

  private final JdbcTemplate jdbcTemplate;

  public MyRunnable(JdbcTemplate jdbcTemplate) {
    this.jdbcTemplate = jdbcTemplate;
  }

  @Override
  public void run() {
    // ... do your logic here
  }
}

and then write a unit test for this class to verify its behaviour in isolation.

Inside your RedisScheduler you can then make use of your new class:

taskExecutor.execute(new MyRunnable(jdbcTemplate));

Answered By - rieckpil