[Fix][test] add required filter expression

1 files changed, 1 insertions, 0 deletions

diff --git a/groot-core/src/test/java/com/geedgenetworks/core/udf/test/simple/DropFunctionTest.java b/groot-core/src/test/java/com/geedgenetworks/core/udf/test/simple/DropFunctionTest.java
index 294a492..027533e 100644
--- a/groot-core/src/test/java/com/geedgenetworks/core/udf/test/simple/DropFunctionTest.java
+++ b/groot-core/src/test/java/com/geedgenetworks/core/udf/test/simple/DropFunctionTest.java
@@ -16,6 +16,7 @@ public class DropFunctionTest {
     @BeforeAll
     public static void setUp() {
         udfContext = new UDFContext();
+        udfContext.setFilter("true");
         udfContext.setParameters(new HashMap<>());
     }