/*
* Copyright 2002-2016 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.context.expression;
import java.lang.reflect.Method;
import org.junit.Test;
import org.springframework.core.DefaultParameterNameDiscoverer;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.util.ReflectionUtils;
import static org.junit.Assert.*;
/**
* Unit tests for {@link MethodBasedEvaluationContext}.
*
* @author Stephane Nicoll
* @author Juergen Hoeller
* @author Sergey Podgurskiy
*/
public class MethodBasedEvaluationContextTests {
private final ParameterNameDiscoverer paramDiscover = new DefaultParameterNameDiscoverer();
@Test
public void simpleArguments() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", String.class, Boolean.class);
MethodBasedEvaluationContext context = createEvaluationContext(method, "test", true);
assertEquals("test", context.lookupVariable("a0"));
assertEquals("test", context.lookupVariable("p0"));
assertEquals("test", context.lookupVariable("foo"));
assertEquals(true, context.lookupVariable("a1"));
assertEquals(true, context.lookupVariable("p1"));
assertEquals(true, context.lookupVariable("flag"));
assertNull(context.lookupVariable("a2"));
assertNull(context.lookupVariable("p2"));
}
@Test
public void nullArgument() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", String.class, Boolean.class);
MethodBasedEvaluationContext context = createEvaluationContext(method, null, null);
assertNull(context.lookupVariable("a0"));
assertNull(context.lookupVariable("p0"));
assertNull(context.lookupVariable("foo"));
assertNull(context.lookupVariable("a1"));
assertNull(context.lookupVariable("p1"));
assertNull(context.lookupVariable("flag"));
}
@Test
public void varArgEmpty() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", Boolean.class, String[].class);
MethodBasedEvaluationContext context = createEvaluationContext(method, new Object[] {null});
assertNull(context.lookupVariable("a0"));
assertNull(context.lookupVariable("p0"));
assertNull(context.lookupVariable("flag"));
assertNull(context.lookupVariable("a1"));
assertNull(context.lookupVariable("p1"));
assertNull(context.lookupVariable("vararg"));
}
@Test
public void varArgNull() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", Boolean.class, String[].class);
MethodBasedEvaluationContext context = createEvaluationContext(method, null, null);
assertNull(context.lookupVariable("a0"));
assertNull(context.lookupVariable("p0"));
assertNull(context.lookupVariable("flag"));
assertNull(context.lookupVariable("a1"));
assertNull(context.lookupVariable("p1"));
assertNull(context.lookupVariable("vararg"));
}
@Test
public void varArgSingle() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", Boolean.class, String[].class);
MethodBasedEvaluationContext context = createEvaluationContext(method, null, "hello");
assertNull(context.lookupVariable("a0"));
assertNull(context.lookupVariable("p0"));
assertNull(context.lookupVariable("flag"));
assertEquals("hello", context.lookupVariable("a1"));
assertEquals("hello", context.lookupVariable("p1"));
assertEquals("hello", context.lookupVariable("vararg"));
}
@Test
public void varArgMultiple() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", Boolean.class, String[].class);
MethodBasedEvaluationContext context = createEvaluationContext(method, null, "hello", "hi");
assertNull(context.lookupVariable("a0"));
assertNull(context.lookupVariable("p0"));
assertNull(context.lookupVariable("flag"));
assertArrayEquals(new Object[] {"hello", "hi"}, (Object[]) context.lookupVariable("a1"));
assertArrayEquals(new Object[] {"hello", "hi"}, (Object[]) context.lookupVariable("p1"));
assertArrayEquals(new Object[] {"hello", "hi"}, (Object[]) context.lookupVariable("vararg"));
}
private MethodBasedEvaluationContext createEvaluationContext(Method method, Object... args) {
return new MethodBasedEvaluationContext(this, method, args, this.paramDiscover);
}
@SuppressWarnings("unused")
private static class SampleMethods {
private void hello(String foo, Boolean flag) {
}
private void hello(Boolean flag, String... vararg){
}
}
}