@Before public void setUp() {
IRubyObject callable = Ruby.getGlobalRuntime()
.evalScriptlet("proc { |env| [200, {'Content-Type' => 'text/plain'}, env.keys] }");
RackEnvironmentBuilder envBuilder = new RackEnvironmentBuilder();
TestHttpServletRequest request = TestHttpServletRequest.newBuilder().build();
app = new JRubyRackApplication(callable);
env = envBuilder.build(request);
}