/*
* Copyright 2002-2012 the original author or authors.
*
* 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.springframework.expression.spel;
import org.junit.Test;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.support.GenericConversionService;
import org.springframework.expression.spel.support.StandardTypeConverter;
/**
* Tests the evaluation of real boolean expressions, these use AND, OR, NOT, TRUE, FALSE
*
* @author Andy Clement
* @author Oliver Becker
*/
public class BooleanExpressionTests extends AbstractExpressionTests {
@Test
public void testBooleanTrue() {
evaluate("true", Boolean.TRUE, Boolean.class);
}
@Test
public void testBooleanFalse() {
evaluate("false", Boolean.FALSE, Boolean.class);
}
@Test
public void testOr() {
evaluate("false or false", Boolean.FALSE, Boolean.class);
evaluate("false or true", Boolean.TRUE, Boolean.class);
evaluate("true or false", Boolean.TRUE, Boolean.class);
evaluate("true or true", Boolean.TRUE, Boolean.class);
}
@Test
public void testAnd() {
evaluate("false and false", Boolean.FALSE, Boolean.class);
evaluate("false and true", Boolean.FALSE, Boolean.class);
evaluate("true and false", Boolean.FALSE, Boolean.class);
evaluate("true and true", Boolean.TRUE, Boolean.class);
}
@Test
public void testNot() {
evaluate("!false", Boolean.TRUE, Boolean.class);
evaluate("!true", Boolean.FALSE, Boolean.class);
evaluate("not false", Boolean.TRUE, Boolean.class);
evaluate("NoT true", Boolean.FALSE, Boolean.class);
}
@Test
public void testCombinations01() {
evaluate("false and false or true", Boolean.TRUE, Boolean.class);
evaluate("true and false or true", Boolean.TRUE, Boolean.class);
evaluate("true and false or false", Boolean.FALSE, Boolean.class);
}
@Test
public void testWritability() {
evaluate("true and true", Boolean.TRUE, Boolean.class, false);
evaluate("true or true", Boolean.TRUE, Boolean.class, false);
evaluate("!false", Boolean.TRUE, Boolean.class, false);
}
@Test
public void testBooleanErrors01() {
evaluateAndCheckError("1.0 or false", SpelMessage.TYPE_CONVERSION_ERROR, 0);
evaluateAndCheckError("false or 39.4", SpelMessage.TYPE_CONVERSION_ERROR, 9);
evaluateAndCheckError("true and 'hello'", SpelMessage.TYPE_CONVERSION_ERROR, 9);
evaluateAndCheckError(" 'hello' and 'goodbye'", SpelMessage.TYPE_CONVERSION_ERROR, 1);
evaluateAndCheckError("!35.2", SpelMessage.TYPE_CONVERSION_ERROR, 1);
evaluateAndCheckError("! 'foob'", SpelMessage.TYPE_CONVERSION_ERROR, 2);
}
@Test
public void testConvertAndHandleNull() { // SPR-9445
// without null conversion
evaluateAndCheckError("null or true", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
evaluateAndCheckError("null and true", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
evaluateAndCheckError("!null", SpelMessage.TYPE_CONVERSION_ERROR, 1, "null", "boolean");
evaluateAndCheckError("null ? 'foo' : 'bar'", SpelMessage.TYPE_CONVERSION_ERROR, 0, "null", "boolean");
// with null conversion (null -> false)
GenericConversionService conversionService = new GenericConversionService() {
@Override
protected Object convertNullSource(TypeDescriptor sourceType, TypeDescriptor targetType) {
return targetType.getType() == Boolean.class ? false : null;
}
};
eContext.setTypeConverter(new StandardTypeConverter(conversionService));
evaluate("null or true", Boolean.TRUE, Boolean.class, false);
evaluate("null and true", Boolean.FALSE, Boolean.class, false);
evaluate("!null", Boolean.TRUE, Boolean.class, false);
evaluate("null ? 'foo' : 'bar'", "bar", String.class, false);
}
}