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test/org/apache/jasper/el/TestJasperELResolver.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.jasper.el;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import javax.el.ELResolver;
+import javax.servlet.jsp.el.ImplicitObjectELResolver;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import org.apache.el.stream.StreamELResolverImpl;
+
+public class TestJasperELResolver {
+
+    @Test
+    public void testConstructorNone() throws Exception {
+        doTestConstructor(0);
+    }
+
+    @Test
+    public void testConstructorOne() throws Exception {
+        doTestConstructor(1);
+    }
+
+    @Test
+    public void testConstructorFive() throws Exception {
+        doTestConstructor(5);
+    }
+
+    private void doTestConstructor(int count) throws Exception {
+
+        List<ELResolver> list = new ArrayList<>();
+        for (int i = 0; i < count; i++) {
+            list.add(new ImplicitObjectELResolver());
+        }
+
+        JasperELResolver resolver =
+                new JasperELResolver(list, new StreamELResolverImpl());
+
+
+        Assert.assertEquals(Integer.valueOf(count),
+                getField("appResolversSize", resolver));
+        Assert.assertEquals(9 + count,
+                ((ELResolver[])getField("resolvers", resolver)).length);
+        Assert.assertEquals(Integer.valueOf(9 + count),
+                Integer.valueOf(((AtomicInteger) getField("resolversSize", resolver)).get()));
+    }
+
+    private static final Object getField(String name, Object target)
+            throws NoSuchFieldException, SecurityException,
+            IllegalArgumentException, IllegalAccessException {
+        Field field = target.getClass().getDeclaredField(name);
+        field.setAccessible(true);
+        return field.get(target);
+    }
+}