@Test
public void getValue() throws Exception {

    SofaRegistryHelper.getValue(null);
    SofaRegistryHelper.getValue(null, null);
    Map<String, String> map = new HashMap<String, String>();
    Assert.assertEquals(SofaRegistryHelper.getValue(map, "xx"), null);
    map.put("11", "aa");
    map.put("22", "bb");
    map.put("33", "cc");
    Assert.assertEquals(SofaRegistryHelper.getValue(map), null);
    Assert.assertEquals(SofaRegistryHelper.getValue(map, "xx"), null);
    Assert.assertEquals(SofaRegistryHelper.getValue(map, "yy", "zz"), null);
    Assert.assertEquals(SofaRegistryHelper.getValue(map, "zz", "11"), "aa");
    Assert.assertEquals(SofaRegistryHelper.getValue(map, "11", "22"), "aa");
    Assert.assertEquals(SofaRegistryHelper.getValue(map, "22", "33"), "bb");
}