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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 java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collections;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
/**
* Used to check that empty values are properly handled in #if statements
*/
public class IfEmptyTestCase extends BaseTestCase
{
public IfEmptyTestCase(final String name)
{
super(name);
}
protected void assertEmpty(Object obj)
{
context.put("obj", obj);
assertEvalEquals("", "#if( $obj )fail#end");
}
protected void assertNotEmpty(Object obj)
{
context.put("obj", obj);
assertEvalEquals("", "#if( !$obj )fail#end");
}
public void testNull()
{
assertEmpty(null);
assertEmpty(new NullAsString());
assertEmpty(new NullAsNumber());
}
public void testDataStructures()
{
assertEmpty(Collections.emptyMap());
assertEmpty(Collections.emptyList());
assertEmpty(new Object[]{});
List list = new ArrayList();
list.add(1);
assertNotEmpty(list);
Map map = new TreeMap();
map.put("foo", 1);
assertNotEmpty(map);
}
public void testString()
{
assertEmpty("");
assertEmpty(new EmptyAsString());
assertNotEmpty("hello");
}
public void testNumber()
{
assertEmpty(0);
assertEmpty(0L);
assertEmpty(0.0f);
assertEmpty(0.0);
assertEmpty(BigInteger.ZERO);
assertEmpty(BigDecimal.ZERO);
assertNotEmpty(1);
assertNotEmpty(1L);
assertNotEmpty(1.0f);
assertNotEmpty(1.0);
assertNotEmpty(BigInteger.ONE);
assertNotEmpty(BigDecimal.ONE);
}
public void testStringBuilder()
{
StringBuilder builder = new StringBuilder();
assertEmpty(builder);
builder.append("yo");
assertNotEmpty(builder);
}
public void testLiterals()
{
assertEvalEquals("", "#if( 0 )fail#end");
assertEvalEquals("", "#if( 0.0 )fail#end");
assertEvalEquals("", "#if( '' )fail#end");
assertEvalEquals("", "#if( \"\" )fail#end");
assertEvalEquals("", "#if( [] )fail#end");
assertEvalEquals("", "#if( {} )fail#end");
assertEvalEquals("", "#if( !1 )fail#end");
assertEvalEquals("", "#if( !1.0 )fail#end");
assertEvalEquals("", "#if( !'foo' )fail#end");
assertEvalEquals("", "#if( !\"foo\" )fail#end");
assertEvalEquals("", "#if( ![ 'foo' ] )fail#end");
assertEvalEquals("", "#if( !{ 'foo':'bar' } )fail#end");
}
public static class NullAsString
{
public String getAsString()
{
return null;
}
}
public static class EmptyAsString
{
public String getAsString()
{
return "";
}
}
public static class NullAsNumber
{
public String getAsNumber()
{
return null;
}
}
}
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