add OgnlTest. #2954

core/src/test/java/com/taobao/arthas/core/command/express/FlowAttribute.java

@@ -0,0 +1,9 @@
+package com.taobao.arthas.core.command.express;
+
+public class FlowAttribute {
+    private String bxApp = "aaa";
+
+    public String getBxApp() {
+     return this.bxApp ;
+    }
+}

core/src/test/java/com/taobao/arthas/core/command/express/FlowContext.java

@@ -0,0 +1,9 @@
+package com.taobao.arthas.core.command.express;
+
+public class FlowContext {
+    private FlowAttribute flowAttribute = new FlowAttribute();
+
+    public FlowAttribute getFlowAttribute() {
+         return this.flowAttribute ;
+    }
+}

core/src/test/java/com/taobao/arthas/core/command/express/OgnlTest.java

@@ -0,0 +1,46 @@
+package com.taobao.arthas.core.command.express;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import com.taobao.arthas.core.advisor.Advice;
+import ognl.OgnlException;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * https://github.com/alibaba/arthas/issues/2954
+ */
+public class OgnlTest {
+
+    private Express express;
+
+    @BeforeEach
+    public void setUp() throws OgnlException, ExpressException {
+        FlowContext context = new FlowContext();
+        Object[] params = new Object[4];
+        params[0] = context;
+        Advice advice = Advice.newForAfterReturning(null, getClass(), null, null, params, null);
+        express = ExpressFactory.unpooledExpress(null).bind(advice).bind("cost", 123);
+    }
+
+    @Test
+    public void testStringEquals() throws OgnlException, ExpressException {
+        String conditionExpress = "\"aaa\".equals(params[0].flowAttribute.getBxApp())";
+        boolean result = express.is(conditionExpress);
+        assertTrue(result);
+    }
+
+    @Test
+    public void testObjectEquals() throws OgnlException, ExpressException {
+        String conditionExpress = "params[0].flowAttribute.getBxApp().equals(\"aaa\")";
+        boolean result = express.is(conditionExpress);
+        assertTrue(result);
+    }
+
+    @Test
+    public void testEqualSign() throws OgnlException, ExpressException {
+        String conditionExpress = "\"aaa\" == params[0].flowAttribute.getBxApp()";
+        boolean result = express.is(conditionExpress);
+        assertTrue(result);
+    }
+}