TestInput<Ex1> in = tester.input(Ex1.class, "ex1");
TestOutput<Ex1> out = tester.output(Ex1.class, "ex1");
JobflowInfo info = DirectFlowCompiler.compile(
tester.analyzeFlow(new UpdateFlowSimple(in.flow(), out.flow())),
"simple",
"simple",
"com.example",
Location.fromPath(HadoopDriver.RUNTIME_WORK_ROOT, '/'),
tester.framework().getWork("build"),