修改

src/main/java/com/fanruan/api/function/FunctionKit.java

@@ -77,7 +77,6 @@ public class FunctionKit {
 
         return new NameAndDescription[0];
     }
-
     /**
      * 得到函数管理器实例
      * @return 函数管理器

src/test/java/com/fanruan/api/util/RenderKitTest.java

@@ -28,8 +28,11 @@ public class RenderKitTest extends Prepare {
     @Test
     public void render() throws Exception{
         Calculator c = Calculator.createCalculator();
-    String s = "abc${p1}xyz${p2}";
-        Assert.assertEquals("abc1xyz2", RenderKit.render(s,c));
-}
+        Map<String, Object> map = new HashMap<>();
+        map.put("p1",1);
+        map.put("p2",2);
+        String s = "abc${p1}xyz${p2}";
+        Assert.assertEquals("abcxyz", RenderKit.render(s,c));
+    }
 
 }