/*
* Copyright 2012-2016 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.boot.autoconfigure.condition;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.List;
import java.util.ServiceLoader;
import java.util.function.Function;
import org.junit.Test;
import org.springframework.boot.autoconfigure.condition.ConditionalOnJava.JavaVersion;
import org.springframework.boot.autoconfigure.condition.ConditionalOnJava.Range;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.ReflectionUtils;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link ConditionalOnJava}.
*
* @author Oliver Gierke
* @author Phillip Webb
*/
public class ConditionalOnJavaTests {
private final AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
private final OnJavaCondition condition = new OnJavaCondition();
@Test
public void doesNotMatchIfBetterVersionIsRequired() {
registerAndRefresh(Java9Required.class);
assertPresent(false);
}
@Test
public void doesNotMatchIfLowerIsRequired() {
registerAndRefresh(Java7Required.class);
assertPresent(false);
}
@Test
public void matchesIfVersionIsInRange() {
registerAndRefresh(Java8Required.class);
assertPresent(true);
}
@Test
public void boundsTests() throws Exception {
testBounds(Range.EQUAL_OR_NEWER, JavaVersion.NINE, JavaVersion.EIGHT, true);
testBounds(Range.EQUAL_OR_NEWER, JavaVersion.EIGHT, JavaVersion.EIGHT, true);
testBounds(Range.EQUAL_OR_NEWER, JavaVersion.EIGHT, JavaVersion.NINE, false);
testBounds(Range.OLDER_THAN, JavaVersion.NINE, JavaVersion.EIGHT, false);
testBounds(Range.OLDER_THAN, JavaVersion.EIGHT, JavaVersion.EIGHT, false);
testBounds(Range.OLDER_THAN, JavaVersion.EIGHT, JavaVersion.NINE, true);
}
@Test
public void equalOrNewerMessage() throws Exception {
ConditionOutcome outcome = this.condition.getMatchOutcome(Range.EQUAL_OR_NEWER,
JavaVersion.NINE, JavaVersion.EIGHT);
assertThat(outcome.getMessage())
.isEqualTo("@ConditionalOnJava (1.8 or newer) found 1.9");
}
@Test
public void olderThanMessage() throws Exception {
ConditionOutcome outcome = this.condition.getMatchOutcome(Range.OLDER_THAN,
JavaVersion.NINE, JavaVersion.EIGHT);
assertThat(outcome.getMessage())
.isEqualTo("@ConditionalOnJava (older than 1.8) found 1.9");
}
@Test
public void java8IsDetected() throws Exception {
assertThat(getJavaVersion()).isEqualTo("1.8");
}
@Test
public void java8IsTheFallback() throws Exception {
assertThat(getJavaVersion(Function.class, Files.class, ServiceLoader.class))
.isEqualTo("1.8");
}
private String getJavaVersion(Class<?>... hiddenClasses) throws Exception {
URL[] urls = ((URLClassLoader) getClass().getClassLoader()).getURLs();
URLClassLoader classLoader = new ClassHidingClassLoader(urls, hiddenClasses);
Class<?> javaVersionClass = classLoader
.loadClass(ConditionalOnJava.JavaVersion.class.getName());
Method getJavaVersionMethod = ReflectionUtils.findMethod(javaVersionClass,
"getJavaVersion");
Object javaVersion = ReflectionUtils.invokeMethod(getJavaVersionMethod, null);
classLoader.close();
return javaVersion.toString();
}
private void testBounds(Range range, JavaVersion runningVersion, JavaVersion version,
boolean expected) {
ConditionOutcome outcome = this.condition.getMatchOutcome(range, runningVersion,
version);
assertThat(outcome.isMatch()).as(outcome.getMessage()).isEqualTo(expected);
}
private void registerAndRefresh(Class<?> annotatedClasses) {
this.context.register(annotatedClasses);
this.context.refresh();
}
private void assertPresent(boolean expected) {
assertThat(this.context.getBeansOfType(String.class)).hasSize(expected ? 1 : 0);
}
private final class ClassHidingClassLoader extends URLClassLoader {
private final List<Class<?>> hiddenClasses;
private ClassHidingClassLoader(URL[] urls, Class<?>... hiddenClasses) {
super(urls, null);
this.hiddenClasses = Arrays.asList(hiddenClasses);
}
@Override
public Class<?> loadClass(String name) throws ClassNotFoundException {
if (isHidden(name)) {
throw new ClassNotFoundException();
}
return super.loadClass(name);
}
private boolean isHidden(String name) {
for (Class<?> hiddenClass : this.hiddenClasses) {
if (hiddenClass.getName().equals(name)) {
return true;
}
}
return false;
}
}
@Configuration
@ConditionalOnJava(JavaVersion.NINE)
static class Java9Required {
@Bean
String foo() {
return "foo";
}
}
@Configuration
@ConditionalOnJava(range = Range.OLDER_THAN, value = JavaVersion.EIGHT)
static class Java7Required {
@Bean
String foo() {
return "foo";
}
}
@Configuration
@ConditionalOnJava(JavaVersion.EIGHT)
static class Java8Required {
@Bean
String foo() {
return "foo";
}
}
}