@Test
public void execute() {

    RegistryContext registryContext = new ContextImpl();
    String testVariable = "testVariable";
    SetDMNInputCommand setDMNInputCommand = new SetDMNInputCommand(testVariable, 10);
    setDMNInputCommand.execute(registryContext);
    DMNContext lookup = registryContext.lookup(DMNContext.class);
    assertTrue(lookup.isDefined(testVariable));
}