@Test
void joinPackageTest() {

    Assertions.assertEquals("com.baomidou.demo", new PackageConfig().joinPackage("demo"));
    Assertions.assertEquals("com.baomidou.mp.demo", new PackageConfig().setModuleName("mp").joinPackage("demo"));
    Assertions.assertEquals("com.baomihua.demo", new PackageConfig().setParent("com.baomihua").joinPackage("demo"));
    Assertions.assertEquals("com.baomihua.mp.demo", new PackageConfig().setParent("com.baomihua").setModuleName("mp").joinPackage("demo"));
}