### Question:
WXAttr extends SafePutConcurrentHashMap<String, Object> { public String getImageSrc() { Object src = get(Constants.Name.SRC); if (src == null) { return null; } return src.toString(); }  static String getPrefix(Map<String, Object> attr); static String getSuffix(Map<String, Object> attr); static String getValue(Map<String, Object> attr); WXImageQuality getImageQuality(); WXImageSharpen getImageSharpen(); String getImageSrc(); boolean showIndicators(); boolean autoPlay(); String getScope(); String getLoadMoreRetry(); String getLoadMoreOffset(); String optString(String key); boolean getIsRecycleImage(); String getScrollDirection();  }### Answer:
@Test public void testGetImageSrc() throws Exception { assertEquals(null,attr.getImageSrc()); attr.put(SRC,"test"); assertEquals("test",attr.getImageSrc()); }