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package org.apache.velocity.test;
/*
* 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.
*/
import org.apache.velocity.runtime.RuntimeConstants;
import org.apache.velocity.test.provider.ForeachMethodCallHelper;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* This class tests the Foreach loop.
*
* @author Daniel Rall
* @author <a href="mailto:wglass@apache.org">Will Glass-Husain</a>
*/
public class ForeachTestCase extends BaseTestCase
{
public ForeachTestCase(String name)
{
super(name);
}
/**
* Tests limiting of the number of loop iterations.
*/
public void testMaxNbrLoopsConstraint()
throws Exception
{
// Limit the loop to three iterations.
engine.setProperty(RuntimeConstants.MAX_NUMBER_LOOPS,
3);
assertEvalEquals("1 2 3 ", "#foreach ($item in [1..10])$item #end");
}
/**
* Tests proper method execution during a Foreach loop over a Collection
* with items of varying classes.
*/
public void testCollectionAndMethodCall()
throws Exception
{
List col = new ArrayList();
col.add(100);
col.add("STRVALUE");
context.put("helper", new ForeachMethodCallHelper());
context.put("col", col);
assertEvalEquals("int 100 str STRVALUE ", "#foreach ( $item in $col )$helper.getFoo($item) #end");
}
/**
* Tests that #foreach will be able to retrieve an iterator from
* an arbitrary object that happens to have an iterator() method.
* (With the side effect of supporting the new Java 5 Iterable interface)
*/
public void testObjectWithIteratorMethod()
throws Exception
{
context.put("iterable", new MyIterable());
assertEvalEquals("1 2 3 ", "#foreach ($i in $iterable)$i #end");
}
public void testNotReallyIterableIteratorMethod()
throws Exception
{
context.put("nri", new NotReallyIterable());
assertEvalEquals("", "#foreach ($i in $nri)$i #end");
}
public void testVelocityHasNextProperty()
throws Exception
{
List list = new ArrayList();
list.add("test1");
list.add("test2");
list.add("test3");
context.put("list", list);
assertEvalEquals("test1 SEPARATOR test2 SEPARATOR test3 ", "#foreach ($value in $list)$value #if( $foreach.hasNext )SEPARATOR #end#end");
}
public void testNestedVelocityHasNextProperty()
throws Exception
{
List list = new ArrayList();
list.add("test1");
list.add("test2");
list.add("test3");
list.add("test4");
context.put("list", list);
List list2 = new ArrayList();
list2.add("a1");
list2.add("a2");
list2.add("a3");
context.put("list2", list2);
assertEvalEquals("test1 (a1;a2;a3)-test2 (a1;a2;a3)-test3 (a1;a2;a3)-test4 (a1;a2;a3)", "#foreach ($value in $list)$value (#foreach ($val in $list2)$val#if( $foreach.hasNext );#end#end)#if( $foreach.hasNext )-#end#end");
}
public static class MyIterable
{
private List foo;
public MyIterable()
{
foo = new ArrayList();
foo.add(1);
foo.add(2L);
foo.add("3");
}
public Iterator iterator()
{
return foo.iterator();
}
}
public static class NotReallyIterable
{
public Object iterator()
{
return new Object();
}
}
}
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