.java

    @Test
    public void testBindMapperPrivateModule() {
        final Module privateModule = new PrivateModule() {
            @Override
            protected void configure() {
                final Module myBatisModule = new MyBatisModule() {
                    @Override
                    protected void initialize() {
                        environmentId(ENV);
                        install(JdbcHelper.H2_EMBEDDED);
                        bindDataSourceProviderType(PooledDataSourceProvider.class);
                        bindTransactionFactoryType(JdbcTransactionFactory.class);
                        addMapperClass(DummyMapper.class);

                    }
                };
                install(myBatisModule);
                expose(DummyMapper.class);
                expose(SqlSessionManager.class);
            }
        };

        final Injector injector = Guice.createInjector(
                Stage.DEVELOPMENT, privateModule);
        injector.getInstance(DummyService.class).insertValue(1);
    }