/*
* Copyright 2013 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.xd.tuple.spel;
import static org.junit.Assert.assertEquals;
import org.junit.Before;
import org.junit.Test;
import org.springframework.expression.spel.SpelEvaluationException;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;
import org.springframework.xd.tuple.Tuple;
import org.springframework.xd.tuple.TupleBuilder;
/**
* @author Mark Fisher
*/
public class TuplePropertyAccessorTests {
private final SpelExpressionParser parser = new SpelExpressionParser();
private final StandardEvaluationContext context = new StandardEvaluationContext();
@Before
public void setup() {
this.context.addPropertyAccessor(new TuplePropertyAccessor());
}
@Test
public void testSimplePropertyByFieldName() {
Tuple tuple = TupleBuilder.tuple().of("foo", "bar");
String result = evaluate("foo", tuple, String.class);
assertEquals("bar", result);
}
@Test
public void testSimplePropertyByIndex() {
Tuple tuple = TupleBuilder.tuple().of("foo", "bar");
String result = evaluate("['0']", tuple, String.class);
assertEquals("bar", result);
}
@Test(expected = SpelEvaluationException.class)
public void failOnNegativeIndex() {
Tuple tuple = TupleBuilder.tuple().of("foo", "bar");
evaluate("['-3']", tuple, String.class);
}
@Test
public void testNestedPropertyByFieldName() {
Tuple child = TupleBuilder.tuple().of("b", 123);
Tuple tuple = TupleBuilder.tuple().of("a", child);
int result = evaluate("a.b", tuple, Integer.class);
assertEquals(123, result);
}
@Test
public void testNestedPropertyByIndex() {
Tuple child = TupleBuilder.tuple().of("b", 123);
Tuple tuple = TupleBuilder.tuple().of("a", child);
int result = evaluate("a['0']", tuple, Integer.class);
assertEquals(123, result);
}
@Test
public void testNestedPropertyByIndexOnly() {
Tuple child = TupleBuilder.tuple().of("b", 123);
Tuple tuple = TupleBuilder.tuple().of("a", child);
int result = evaluate("['0']['0']", tuple, Integer.class);
assertEquals(123, result);
}
@Test
public void testArrayPropertyByFieldName() {
Tuple tuple = TupleBuilder.tuple().of("numbers", new Integer[] { 1, 2, 3 });
int result = evaluate("numbers[1]", tuple, Integer.class);
assertEquals(2, result);
}
@Test
public void testArrayPropertyByIndex() {
Tuple tuple = TupleBuilder.tuple().of("numbers", new Integer[] { 1, 2, 3 });
int result = evaluate("['0'][0]", tuple, Integer.class);
assertEquals(1, result);
}
@Test
public void testNestedArrayPropertyByFieldName() {
Tuple child = TupleBuilder.tuple().of("numbers", new Integer[] { 7, 8, 9 });
Tuple tuple = TupleBuilder.tuple().of("child", child);
int result = evaluate("child.numbers[1]", tuple, Integer.class);
assertEquals(8, result);
}
@Test
public void testNestedArrayPropertyByIndex() {
Tuple child = TupleBuilder.tuple().of("numbers", new Integer[] { 7, 8, 9 });
Tuple tuple = TupleBuilder.tuple().of("child", child);
int result = evaluate("child['0'][2]", tuple, Integer.class);
assertEquals(9, result);
}
@Test
public void testNestedArrayPropertyByIndexOnly() {
Tuple child = TupleBuilder.tuple().of("numbers", new Integer[] { 7, 8, 9 });
Tuple tuple = TupleBuilder.tuple().of("child", child);
int result = evaluate("['0']['0'][1]", tuple, Integer.class);
assertEquals(8, result);
}
private <T> T evaluate(String expression, Tuple tuple, Class<T> expectedType) {
return parser.parseExpression(expression).getValue(this.context, tuple, expectedType);
}
}