MockTestExecutionPlanBuilder builder = builder();
builder.addImporter(command("unknown", "unknown"));
JobExecutor executor = new InProcessJobExecutor(context, emptyConfigurations());
try {
executor.validatePlan(builder.build());
throw new IllegalStateException();
} catch (AssertionError e) {
// ok.
} catch (IllegalStateException e) {
throw new AssertionError(e);