重载 equalsCode 方法；添加单元测试

src/main/java/xyz/zhouxy/plusone/commons/base/IWithCode.java

@@ -34,4 +34,15 @@ public interface IWithCode<T> {
     default boolean equalsCode(T code) {
         return Objects.equals(getCode(), code);
     }
+    default boolean equalsCode(IWithCode<?> obj) { // TODO 单元测试
+        return obj != null && obj.getCode().equals(getCode());
+    }
+
+    default boolean equalsCode(IWithIntCode obj) { // TODO 单元测试
+        return obj != null && getCode().equals(obj.getCode());
+    }
+
+    default boolean equalsCode(IWithLongCode obj) { // TODO 单元测试
+        return obj != null && getCode().equals(obj.getCode());
+    }
 }