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MethodBasedEvaluationContextTests.java
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MethodBasedEvaluationContextTests.java
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/*
* Copyright 2002-2022 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
*
* https://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.jupiter.api.Test;
import org.springframework.core.DefaultParameterNameDiscoverer;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.util.ReflectionUtils;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.InstanceOfAssertFactories.BOOLEAN;
/**
* 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);
assertThat(context.lookupVariable("a0")).isEqualTo("test");
assertThat(context.lookupVariable("p0")).isEqualTo("test");
assertThat(context.lookupVariable("foo")).isEqualTo("test");
assertThat(context.lookupVariable("a1")).asInstanceOf(BOOLEAN).isTrue();
assertThat(context.lookupVariable("p1")).asInstanceOf(BOOLEAN).isTrue();
assertThat(context.lookupVariable("flag")).asInstanceOf(BOOLEAN).isTrue();
assertThat(context.lookupVariable("a2")).isNull();
assertThat(context.lookupVariable("p2")).isNull();
}
@Test
public void nullArgument() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", String.class, Boolean.class);
MethodBasedEvaluationContext context = createEvaluationContext(method, null, null);
assertThat(context.lookupVariable("a0")).isNull();
assertThat(context.lookupVariable("p0")).isNull();
assertThat(context.lookupVariable("foo")).isNull();
assertThat(context.lookupVariable("a1")).isNull();
assertThat(context.lookupVariable("p1")).isNull();
assertThat(context.lookupVariable("flag")).isNull();
}
@Test
public void varArgEmpty() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", Boolean.class, String[].class);
MethodBasedEvaluationContext context = createEvaluationContext(method, new Object[] {null});
assertThat(context.lookupVariable("a0")).isNull();
assertThat(context.lookupVariable("p0")).isNull();
assertThat(context.lookupVariable("flag")).isNull();
assertThat(context.lookupVariable("a1")).isNull();
assertThat(context.lookupVariable("p1")).isNull();
assertThat(context.lookupVariable("vararg")).isNull();
}
@Test
public void varArgNull() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", Boolean.class, String[].class);
MethodBasedEvaluationContext context = createEvaluationContext(method, null, null);
assertThat(context.lookupVariable("a0")).isNull();
assertThat(context.lookupVariable("p0")).isNull();
assertThat(context.lookupVariable("flag")).isNull();
assertThat(context.lookupVariable("a1")).isNull();
assertThat(context.lookupVariable("p1")).isNull();
assertThat(context.lookupVariable("vararg")).isNull();
}
@Test
public void varArgSingle() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", Boolean.class, String[].class);
MethodBasedEvaluationContext context = createEvaluationContext(method, null, "hello");
assertThat(context.lookupVariable("a0")).isNull();
assertThat(context.lookupVariable("p0")).isNull();
assertThat(context.lookupVariable("flag")).isNull();
assertThat(context.lookupVariable("a1")).isEqualTo("hello");
assertThat(context.lookupVariable("p1")).isEqualTo("hello");
assertThat(context.lookupVariable("vararg")).isEqualTo("hello");
}
@Test
public void varArgMultiple() {
Method method = ReflectionUtils.findMethod(SampleMethods.class, "hello", Boolean.class, String[].class);
MethodBasedEvaluationContext context = createEvaluationContext(method, null, "hello", "hi");
assertThat(context.lookupVariable("a0")).isNull();
assertThat(context.lookupVariable("p0")).isNull();
assertThat(context.lookupVariable("flag")).isNull();
assertThat(context.lookupVariable("a1")).isEqualTo(new Object[] {"hello", "hi"});
assertThat(context.lookupVariable("p1")).isEqualTo(new Object[] {"hello", "hi"});
assertThat(context.lookupVariable("vararg")).isEqualTo(new Object[] {"hello", "hi"});
}
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){
}
}
}