@Test
  public void assertPoWIsNotMiningPreMerge() {
    assertThat(miningConfiguration.isMiningEnabled()).isFalse();
    var transCoordinator = buildTransitionCoordinator(powBuilder, postMergeBuilder);
    assertThat(transCoordinator.isMiningBeforeMerge()).isFalse();
  }
We only bother testing transitionControllerBuilder for PoW and Clique since those are the only
network types that are transitioning to PoS.
app/src/test/java/org/hyperledger/besu/controller/TransitionControllerBuilderTest.java