/*
* Copyright 2002,2004 The Apache Software Foundation.
*
* Licensed 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.commons.jexl;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Collections;
import java.util.Set;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.apache.commons.jexl.parser.ParseException;
import org.apache.commons.jexl.parser.Parser;
import org.apache.commons.jexl.parser.SimpleNode;
import org.apache.commons.jexl.resolver.FlatResolver;
/**
* Simple testcases
*
* @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
* @version $Id: JexlTest.java,v 1.60 2004/09/01 00:35:38 dion Exp $
*/
public class JexlTest extends TestCase
{
protected static final String METHOD_STRING = "Method string";
protected static final String GET_METHOD_STRING = "GetMethod string";
protected static final String[] GET_METHOD_ARRAY =
new String[] { "One", "Two", "Three" };
protected static final String[][] GET_METHOD_ARRAY2 =
new String[][] { {"One", "Two", "Three"},{"Four", "Five", "Six"} };
public static Test suite()
{
return new TestSuite(JexlTest.class);
}
public JexlTest(String testName)
{
super(testName);
}
/**
* test a simple property expression
*/
public void testProperty()
throws Exception
{
/*
* tests a simple property expression
*/
Expression e = ExpressionFactory.createExpression("foo.bar");
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Foo() );
Object o = e.evaluate(jc);
assertTrue("o not instanceof String", o instanceof String);
assertTrue("o incorrect", o.equals(GET_METHOD_STRING));
}
/**
* test a simple method expression
*/
public void testMethod()
throws Exception
{
/*
* tests a simple method expression
*/
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Foo() );
assertExpression(jc, "foo.bar()", METHOD_STRING);
}
/**
* test a simple method expression
*/
public void testArrayAccess()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
/*
* test List access
*/
List l = new ArrayList();
l.add(new Integer(1));
l.add(new Integer(2));
l.add(new Integer(3));
jc.getVars().put("list", l);
assertExpression(jc, "list[1]", new Integer(2));
assertExpression(jc, "list[1+1]", new Integer(3));
jc.getVars().put("loc", new Integer(1));
assertExpression(jc, "list[loc+1]", new Integer(3));
/*
* test array access
*/
String[] args = {"hello", "there"};
jc.getVars().put("array", args);
assertExpression(jc, "array[0]", "hello");
/*
* to think that this was an intentional syntax...
*/
assertExpression(jc, "array.0", "hello");
/*
* test map access
*/
Map m = new HashMap();
m.put("foo", "bar");
jc.getVars().put("map", m);
jc.getVars().put("key", "foo");
assertExpression(jc, "map[\"foo\"]", "bar");
assertExpression(jc, "map[key]", "bar");
/*
* test bean access
*/
jc.getVars().put("foo", new Foo());
assertExpression(jc, "foo[\"bar\"]", GET_METHOD_STRING);
assertExpression(jc, "foo[\"bar\"] == foo.bar", Boolean.TRUE);
}
public void testMulti()
throws Exception
{
/*
* tests a simple property expression
*/
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Foo() );
assertExpression(jc, "foo.innerFoo.bar()", METHOD_STRING);
}
public void testBoolean()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Foo() );
jc.getVars().put("a", Boolean.TRUE);
jc.getVars().put("b", Boolean.FALSE);
assertExpression(jc, "foo.convertBoolean(a==b)", "Boolean : false");
assertExpression(jc, "foo.convertBoolean(a==true)", "Boolean : true");
assertExpression(jc, "foo.convertBoolean(a==false)", "Boolean : false");
assertExpression(jc, "foo.convertBoolean(true==false)", "Boolean : false");
assertExpression(jc, "true eq false", Boolean.FALSE);
assertExpression(jc, "true ne false", Boolean.TRUE);
}
public void testStringLit()
throws Exception
{
/*
* tests a simple property expression
*/
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Foo() );
assertExpression(jc, "foo.get(\"woogie\")", "Repeat : woogie");
}
public void testExpression()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Foo() );
jc.getVars().put("a", Boolean.TRUE);
jc.getVars().put("b", Boolean.FALSE);
jc.getVars().put("num", new Integer(5));
assertExpression(jc, "a == b", Boolean.FALSE);
assertExpression(jc, "a==true", Boolean.TRUE);
assertExpression(jc, "a==false", Boolean.FALSE);
assertExpression(jc, "true==false", Boolean.FALSE);
assertExpression(jc, "num < 3", Boolean.FALSE);
assertExpression(jc, "num <= 5", Boolean.TRUE);
assertExpression(jc, "num >= 5", Boolean.TRUE);
assertExpression(jc, "num > 4", Boolean.TRUE);
assertExpression(jc, "\"foo\" + \"bar\" == \"foobar\"", Boolean.TRUE);
}
public void testEmpty()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("string", "");
jc.getVars().put("array", new Object[0]);
jc.getVars().put("map", new HashMap());
jc.getVars().put("list", new ArrayList());
jc.getVars().put("set", (new HashMap()).keySet());
jc.getVars().put("longstring", "thingthing");
/*
* I can't believe anyone thinks this is a syntax.. :)
*/
assertExpression(jc, "empty nullthing", Boolean.TRUE);
assertExpression(jc, "empty string", Boolean.TRUE);
assertExpression(jc, "empty array", Boolean.TRUE);
assertExpression(jc, "empty map", Boolean.TRUE);
assertExpression(jc, "empty set", Boolean.TRUE);
assertExpression(jc, "empty list", Boolean.TRUE);
assertExpression(jc, "empty longstring", Boolean.FALSE);
assertExpression(jc, "not empty longstring", Boolean.TRUE);
}
public void testSize()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("s", "five!");
jc.getVars().put("array", new Object[5]);
Map map = new HashMap();
map.put("1", new Integer(1));
map.put("2", new Integer(2));
map.put("3", new Integer(3));
map.put("4", new Integer(4));
map.put("5", new Integer(5));
jc.getVars().put("map", map);
List list = new ArrayList();
list.add("1");
list.add("2");
list.add("3");
list.add("4");
list.add("5");
jc.getVars().put("list", list);
// 30652 - support for set
Set set = new HashSet();
set.addAll(list);
set.add("1");
jc.getVars().put("set", set);
// support generic int size() method
BitSet bitset = new BitSet(5);
jc.getVars().put("bitset", bitset);
assertExpression(jc, "size(s)", new Integer(5));
assertExpression(jc, "size(array)", new Integer(5));
assertExpression(jc, "size(list)", new Integer(5));
assertExpression(jc, "size(map)", new Integer(5));
assertExpression(jc, "size(set)", new Integer(5));
assertExpression(jc, "size(bitset)", new Integer(64));
assertExpression(jc, "list.size()", new Integer(5));
assertExpression(jc, "map.size()", new Integer(5));
assertExpression(jc, "set.size()", new Integer(5));
assertExpression(jc, "bitset.size()", new Integer(64));
assertExpression(jc, "list.get(size(list) - 1)", "5");
assertExpression(jc, "list[size(list) - 1]", "5");
assertExpression(jc, "list.get(list.size() - 1)", "5");
}
public void testSizeAsProperty() throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("map", Collections.singletonMap( "size", "cheese"));
jc.getVars().put("foo", new Foo());
assertExpression(jc, "map['size']", "cheese");
// PR - unsure whether or not we should support map.size or force usage of the above 'escaped' version
// assertExpression(jc, "map.size", "cheese");
assertExpression(jc, "foo.getSize()", new Integer(22));
// failing assertion for size property
//assertExpression(jc, "foo.size", new Integer(22));
}
/**
* test some String method calls
*/
public void testStringMethods()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", "abcdef");
assertExpression(jc, "foo.substring(3)", "def");
assertExpression(jc, "foo.substring(0,(size(foo)-3))", "abc");
assertExpression(jc, "foo.substring(0,size(foo)-3)", "abc");
assertExpression(jc, "foo.substring(0,foo.length()-3)", "abc");
}
/**
* test some simple mathematical calculations
*/
public void testCalculations()
throws Exception
{
Expression e = null;
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Integer(2) );
Object o = null;
assertExpression(jc, "foo + 2", new Long(4));
assertExpression(jc, "3 + 3", new Long(6));
assertExpression(jc, "3 + 3 + foo", new Long(8));
assertExpression(jc, "3 * 3", new Long(9));
assertExpression(jc, "3 * 3 + foo", new Long(11));
assertExpression(jc, "3 * 3 - foo", new Long(7));
/*
* test some floaty stuff
*/
assertExpression(jc, "3 * \"3.0\"", new Double(9));
assertExpression(jc, "3 * 3.0", new Double(9));
/*
* test / and %
*/
assertExpression(jc, "6 / 3", new Double(6/3));
assertExpression(jc, "6.4 / 3", new Double(6.4 / 3));
assertExpression(jc, "0 / 3", new Double(0 / 3));
assertExpression(jc, "3 / 0", new Double(0));
assertExpression(jc, "4 % 3", new Long(1));
assertExpression(jc, "4.8 % 3", new Double(4.8 % 3));
/*
* test to ensure new string cat works
*/
jc.getVars().put("stringy", "thingy" );
assertExpression(jc, "stringy + 2", "thingy2");
/*
* test new null coersion
*/
jc.getVars().put("imanull", null );
assertExpression(jc, "imanull + 2", new Long(2));
assertExpression(jc, "imanull + imanull", new Long(0));
}
/**
* test some simple conditions
*/
public void testConditions()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", new Integer(2) );
jc.getVars().put("aFloat", new Float(1));
jc.getVars().put("aDouble", new Double(2));
jc.getVars().put("aChar", new Character('A'));
jc.getVars().put("aBool", Boolean.TRUE);
StringBuffer buffer = new StringBuffer("abc");
List list = new ArrayList();
List list2 = new LinkedList();
jc.getVars().put("aBuffer", buffer);
jc.getVars().put("aList", list);
jc.getVars().put("bList", list2);
assertExpression(jc, "foo == 2", Boolean.TRUE);
assertExpression(jc, "2 == 3", Boolean.FALSE);
assertExpression(jc, "3 == foo", Boolean.FALSE);
assertExpression(jc, "3 != foo", Boolean.TRUE);
assertExpression(jc, "foo != 2", Boolean.FALSE);
// test float and double equality
assertExpression(jc, "aFloat eq aDouble", Boolean.FALSE);
assertExpression(jc, "aFloat ne aDouble", Boolean.TRUE);
assertExpression(jc, "aFloat == aDouble", Boolean.FALSE);
assertExpression(jc, "aFloat != aDouble", Boolean.TRUE);
// test number and character equality
assertExpression(jc, "foo == aChar", Boolean.FALSE);
assertExpression(jc, "foo != aChar", Boolean.TRUE);
// test string and boolean
assertExpression(jc, "aBool == 'true'", Boolean.TRUE);
assertExpression(jc, "aBool == 'false'", Boolean.FALSE);
assertExpression(jc, "aBool != 'false'", Boolean.TRUE);
// test null and boolean
assertExpression(jc, "aBool == notThere", Boolean.FALSE);
assertExpression(jc, "aBool != notThere", Boolean.TRUE);
// anything and string as a string comparison
assertExpression(jc, "aBuffer == 'abc'", Boolean.TRUE);
assertExpression(jc, "aBuffer != 'abc'", Boolean.FALSE);
// arbitrary equals
assertExpression(jc, "aList == bList", Boolean.TRUE);
assertExpression(jc, "aList != bList", Boolean.FALSE);
}
/**
* test some simple conditions
*/
public void testNotConditions()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
Foo foo = new Foo();
jc.getVars().put("x", Boolean.TRUE );
jc.getVars().put("foo", foo );
jc.getVars().put("bar", "true" );
assertExpression(jc, "!x", Boolean.FALSE);
assertExpression(jc, "x", Boolean.TRUE);
assertExpression(jc, "!bar", Boolean.FALSE);
assertExpression(jc, "!foo.isSimple()", Boolean.FALSE);
assertExpression(jc, "foo.isSimple()", Boolean.TRUE);
assertExpression(jc, "!foo.simple", Boolean.FALSE);
assertExpression(jc, "foo.simple", Boolean.TRUE);
assertExpression(jc, "foo.getCheeseList().size() == 3", Boolean.TRUE);
assertExpression(jc, "foo.cheeseList.size() == 3", Boolean.TRUE);
jc.getVars().put("string", "");
assertExpression(jc, "not empty string", Boolean.FALSE);
assertExpression(jc, "not(empty string)", Boolean.FALSE);
assertExpression(jc, "not empty(string)", Boolean.FALSE);
assertExpression(jc, "! empty string", Boolean.FALSE);
assertExpression(jc, "!(empty string)", Boolean.FALSE);
assertExpression(jc, "!empty(string)", Boolean.FALSE);
}
/**
* GMJ : disabled - need to fix
*
* test some simple conditions
*/
public void testNotConditionsWithDots()
throws Exception
{
Expression e = ExpressionFactory.createExpression("x.a");
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("x.a", Boolean.TRUE );
jc.getVars().put("x.b", Boolean.FALSE );
assertExpression(jc, "x.a", Boolean.TRUE);
assertExpression(jc, "!x.a", Boolean.FALSE);
assertExpression(jc, "!x.b", Boolean.TRUE);
}
/**
* test some simple conditions
*/
public void testComparisons()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", "the quick and lazy fox" );
assertExpression(jc, "foo.indexOf('quick') > 0", Boolean.TRUE);
assertExpression(jc, "foo.indexOf('bar') >= 0", Boolean.FALSE);
assertExpression(jc, "foo.indexOf('bar') < 0", Boolean.TRUE);
}
/**
* test some null conditions
*/
public void testNull()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("bar", new Integer(2) );
assertExpression(jc, "empty foo", Boolean.TRUE);
assertExpression(jc, "bar == null", Boolean.FALSE);
assertExpression(jc, "foo == null", Boolean.TRUE);
assertExpression(jc, "bar != null", Boolean.TRUE);
assertExpression(jc, "foo != null", Boolean.FALSE);
assertExpression(jc, "empty(bar)", Boolean.FALSE);
assertExpression(jc, "empty(foo)", Boolean.TRUE);
}
/**
* test some blank strings
*/
public void testBlankStrings()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("bar", "" );
assertExpression(jc, "foo == ''", Boolean.FALSE);
assertExpression(jc, "bar == ''", Boolean.TRUE);
assertExpression(jc, "barnotexist == ''", Boolean.FALSE);
assertExpression(jc, "empty bar", Boolean.TRUE);
assertExpression(jc, "bar.length() == 0", Boolean.TRUE);
assertExpression(jc, "size(bar) == 0", Boolean.TRUE);
}
/**
* test some blank strings
*/
public void testLogicExpressions()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", "abc" );
jc.getVars().put("bar", "def" );
assertExpression(jc, "foo == 'abc' || bar == 'abc'", Boolean.TRUE);
assertExpression(jc, "foo == 'abc' or bar == 'abc'", Boolean.TRUE);
assertExpression(jc, "foo == 'abc' && bar == 'abc'", Boolean.FALSE);
assertExpression(jc, "foo == 'abc' and bar == 'abc'", Boolean.FALSE);
assertExpression(jc, "foo == 'def' || bar == 'abc'", Boolean.FALSE);
assertExpression(jc, "foo == 'def' or bar == 'abc'", Boolean.FALSE);
assertExpression(jc, "foo == 'abc' && bar == 'def'", Boolean.TRUE);
assertExpression(jc, "foo == 'abc' and bar == 'def'", Boolean.TRUE);
}
/**
* test some simple double array lookups
*/
public void testDoubleArrays()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
Object[][] foo = new Object[2][2];
foo[0][0] = "one";
foo[0][1] = "two";
jc.getVars().put("foo", foo );
assertExpression(jc, "foo[0][1]", "two");
}
/**
* test variables with underscore names
*/
public void testVariableNames()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo_bar", "123" );
assertExpression(jc, "foo_bar", "123");
}
/**
* test the use of dot notation to lookup map entries
*/
public void testMapDot()
throws Exception
{
Map foo = new HashMap();
foo.put( "bar", "123" );
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", foo );
assertExpression(jc, "foo.bar", "123");
}
/**
* Tests string literals
*/
public void testStringLiterals()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", "bar" );
assertExpression(jc, "foo == \"bar\"", Boolean.TRUE);
assertExpression(jc, "foo == 'bar'", Boolean.TRUE);
}
/**
* test the use of an int based property
*/
public void testIntProperty()
throws Exception
{
Foo foo = new Foo();
// lets check the square function first..
assertEquals(4, foo.square(2));
assertEquals(4, foo.square(-2));
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", foo );
assertExpression(jc, "foo.count", new Integer(5));
assertExpression(jc, "foo.square(2)", new Integer(4));
assertExpression(jc, "foo.square(-2)", new Integer(4));
}
/**
* test the -1 comparison bug
*/
public void testNegativeIntComparison()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
Foo foo = new Foo();
jc.getVars().put("foo", foo );
assertExpression(jc, "foo.count != -1", Boolean.TRUE);
assertExpression(jc, "foo.count == 5", Boolean.TRUE);
assertExpression(jc, "foo.count == -1", Boolean.FALSE);
}
public void testArrayProperty()
throws Exception
{
Foo foo = new Foo();
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", foo );
Expression bracketForm =
ExpressionFactory.createExpression("foo.array[1]");
Expression dotForm =
ExpressionFactory.createExpression("foo.array.1");
assertExpression(jc, "foo.array[1]", GET_METHOD_ARRAY[1]);
assertExpression(jc, "foo.array.1", GET_METHOD_ARRAY[1]);
assertExpression(jc, "foo.array2[1][1]", GET_METHOD_ARRAY2[1][1]);
//assertExpression(jc, "foo.array2.1.1", GET_METHOD_ARRAY2[1][1]);
}
/**
* Attempts to recreate bug http://jira.werken.com/ViewIssue.jspa?key=JELLY-8
*/
public void testCharAtBug()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("foo", "abcdef");
assertExpression(jc, "foo.substring(2,4)", "cd");
assertExpression(jc, "foo.charAt(2)", new Character('c'));
try {
assertExpression(jc, "foo.charAt(-2)", null);
fail("this test should have thrown an exception" );
}
catch (IndexOutOfBoundsException e) {
// expected behaviour
}
catch (Exception e) {
throw e;
}
}
public void testEmptyDottedVariableName() throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put( "this.is.a.test", "");
assertExpression(jc, "empty(this.is.a.test)", Boolean.TRUE);
}
public void testEmptySubListOfMap() throws Exception
{
JexlContext jc = JexlHelper.createContext();
Map m = Collections.singletonMap("aList", Collections.EMPTY_LIST);
jc.getVars().put( "aMap", m );
assertExpression( jc, "empty( aMap.aList )", Boolean.TRUE );
}
public void testCoercionWithComparisionOperators()
throws Exception
{
JexlContext jc = JexlHelper.createContext();
assertExpression(jc, "'2' > 1", Boolean.TRUE);
assertExpression(jc, "'2' >= 1", Boolean.TRUE);
assertExpression(jc, "'2' >= 2", Boolean.TRUE);
assertExpression(jc, "'2' < 1", Boolean.FALSE);
assertExpression(jc, "'2' <= 1", Boolean.FALSE);
assertExpression(jc, "'2' <= 2", Boolean.TRUE);
assertExpression(jc, "2 > '1'", Boolean.TRUE);
assertExpression(jc, "2 >= '1'", Boolean.TRUE);
assertExpression(jc, "2 >= '2'", Boolean.TRUE);
assertExpression(jc, "2 < '1'", Boolean.FALSE);
assertExpression(jc, "2 <= '1'", Boolean.FALSE);
assertExpression(jc, "2 <= '2'", Boolean.TRUE);
}
public void testResolver()
throws Exception
{
/*
* first, a simple override
*/
Expression expr =
ExpressionFactory.createExpression("foo.bar");
expr.addPreResolver(new FlatResolver());
JexlContext jc = JexlHelper.createContext();
Foo foo = new Foo();
jc.getVars().put("foo.bar", "flat value");
jc.getVars().put("foo", foo );
Object o = expr.evaluate(jc);
assertEquals("flat override", o,"flat value");
/*
* now, let the resolver not find it and have it drop to jexl
*/
expr =
ExpressionFactory.createExpression("foo.bar.length()");
expr.addPreResolver(new FlatResolver());
o = expr.evaluate(jc);
assertEquals("flat override 1", o,new Integer(GET_METHOD_STRING.length()));
/*
* now, let the resolver not find it and NOT drop to jexl
*/
expr =
ExpressionFactory.createExpression("foo.bar.length()");
expr.addPreResolver(new FlatResolver(false));
o = expr.evaluate(jc);
assertEquals("flat override 2", o, null);
}
/**
* Test that 'and' only evaluates the second item if needed
* @throws Exception if there are errors
*/
public void testBooleanShortCircuitAnd() throws Exception
{
// handle false for the left arg of 'and'
Foo tester = new Foo();
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("first", Boolean.FALSE);
jc.getVars().put("foo", tester);
Expression expr = ExpressionFactory.createExpression("first and foo.trueAndModify");
expr.evaluate(jc);
assertTrue("Short circuit failure: rhs evaluated when lhs FALSE", !tester.getModified());
// handle true for the left arg of 'and'
tester = new Foo();
jc.getVars().put("first", Boolean.TRUE);
jc.getVars().put("foo", tester);
expr.evaluate(jc);
assertTrue("Short circuit failure: rhs not evaluated when lhs TRUE", tester.getModified());
}
/**
* Test that 'or' only evaluates the second item if needed
* @throws Exception if there are errors
*/
public void testBooleanShortCircuitOr() throws Exception
{
// handle false for the left arg of 'or'
Foo tester = new Foo();
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("first", Boolean.FALSE);
jc.getVars().put("foo", tester);
Expression expr = ExpressionFactory.createExpression("first or foo.trueAndModify");
expr.evaluate(jc);
assertTrue("Short circuit failure: rhs not evaluated when lhs FALSE", tester.getModified());
// handle true for the left arg of 'or'
tester = new Foo();
jc.getVars().put("first", Boolean.TRUE);
jc.getVars().put("foo", tester);
expr.evaluate(jc);
assertTrue("Short circuit failure: rhs evaluated when lhs TRUE", !tester.getModified());
}
/**
* Simple test of '+' as a string concatenation operator
* @throws Exception
*/
public void testStringConcatenation() throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("first", "Hello");
jc.getVars().put("second", "World");
assertExpression(jc, "first + ' ' + second", "Hello World");
}
/**
* Ensures static methods on objects can be called.
*/
public void testStaticMethodInvocation() throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("aBool", Boolean.FALSE);
assertExpression(jc, "aBool.valueOf('true')", Boolean.TRUE);
}
/**
* Make sure bad syntax throws ParseException
* @throws Exception on errors
*/
public void testBadParse() throws Exception
{
try
{
assertExpression(JexlHelper.createContext(), "empty()", null);
}
catch (ParseException pe)
{
System.err.println("Expecting a parse exception: " + pe.getMessage());
}
}
/**
* Test the ## comment in a string
* @throws Exception
*/
public void testComment() throws Exception
{
assertExpression(JexlHelper.createContext(), "## double or nothing\n 1 + 1", Long.valueOf("2"));
}
/**
* Assignment isn't implemented for an expression language
* @throws Exception
*/
public void testAssignment() throws Exception
{
JexlContext jc = JexlHelper.createContext();
jc.getVars().put("aString", "Hello");
Parser parser = new Parser(new StringReader(";"));
SimpleNode tree = parser.parse(new StringReader("aString = 'World';"));
}
public void testAntPropertiesWithMethods() throws Exception
{
JexlContext jc = JexlHelper.createContext();
String value = "Stinky Cheese";
jc.getVars().put("maven.bob.food", value);
assertExpression(jc, "maven.bob.food.length()", new Integer(value.length()));
assertExpression(jc, "empty(maven.bob.food)", Boolean.FALSE);
assertExpression(jc, "size(maven.bob.food)", new Integer(value.length()));
assertExpression(jc, "maven.bob.food + ' is good'", value + " is good");
// DG: Note the following ant properties don't work
// String version = "1.0.3";
// jc.getVars().put("commons-logging", version);
// assertExpression(jc, "commons-logging", version);
}
/**
* Asserts that the given expression returns the given value when applied to the
* given context
*/
protected void assertExpression(JexlContext jc, String expression, Object expected) throws Exception
{
Expression e = ExpressionFactory.createExpression(expression);
Object actual = e.evaluate(jc);
assertEquals(expression, expected, actual);
}
/**
* Helps in debugging the testcases when working with it
*
*/
public static void main(String[] args)
throws Exception
{
JexlTest jt = new JexlTest("foo");
jt.testEmpty();
}
}