### Question:
GoogleCloudIdempotentImportExecutor implements IdempotentImportExecutor { @Override public <T extends Serializable> T getCachedValue(String idempotentId) throws IllegalArgumentException { if (!knownValues.containsKey(idempotentId)) { throw new IllegalArgumentException( idempotentId + " is not a known key, known keys: " + Joiner.on(", ").join(knownValues.keySet())); } return (T) knownValues.get(idempotentId); } GoogleCloudIdempotentImportExecutor(Datastore datastore, Monitor monitor); @Override T executeAndSwallowIOExceptions(
      String idempotentId, String itemName, Callable<T> callable); @Override T executeOrThrowException(
      String idempotentId, String itemName, Callable<T> callable); @Override T getCachedValue(String idempotentId); @Override boolean isKeyCached(String idempotentId); @Override Collection<ErrorDetail> getErrors(); @Override void setJobId(UUID jobId);  }### Answer:
@Test public void getCachedValue() throws Exception { googleExecutor.setJobId(JOB_ID); googleExecutor.executeAndSwallowIOExceptions("id1", ITEM_NAME, () -> "idempotentId1"); assertEquals(googleExecutor.getCachedValue("id1"), "idempotentId1"); }