@Test
public void test_parseExtAttribute() throws Exception {

    assertEquals(Utils.kv2Map("k1", "v1", "k2", "v2"), ExtensionLoader.parseExtAttribute("k1=v1,k2=v2"));
    assertEquals(Utils.kv2Map("k1", "v1", "k2", "v2", "k3", ""), ExtensionLoader.parseExtAttribute("  k1   =v1,   k2=    v2  , k3    "));
    assertEquals(Utils.kv2Map("k1", ""), ExtensionLoader.parseExtAttribute("k1"));
}