org.springframework.test.context.BootstrapUtils Maven / Gradle / Ivy
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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.test.context;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.util.LinkedHashSet;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.BeanUtils;
import org.springframework.core.log.LogMessage;
import org.springframework.lang.Nullable;
import org.springframework.test.context.TestContextAnnotationUtils.AnnotationDescriptor;
import org.springframework.util.ClassUtils;
/**
* {@code BootstrapUtils} is a collection of utility methods to assist with
* bootstrapping the Spring TestContext Framework.
*
* Only intended for internal use.
*
* @author Sam Brannen
* @author Phillip Webb
* @since 4.1
* @see BootstrapWith
* @see BootstrapContext
* @see TestContextBootstrapper
*/
public abstract class BootstrapUtils {
private static final String DEFAULT_BOOTSTRAP_CONTEXT_CLASS_NAME =
"org.springframework.test.context.support.DefaultBootstrapContext";
private static final String DEFAULT_CACHE_AWARE_CONTEXT_LOADER_DELEGATE_CLASS_NAME =
"org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate";
private static final String DEFAULT_TEST_CONTEXT_BOOTSTRAPPER_CLASS_NAME =
"org.springframework.test.context.support.DefaultTestContextBootstrapper";
private static final String DEFAULT_WEB_TEST_CONTEXT_BOOTSTRAPPER_CLASS_NAME =
"org.springframework.test.context.web.WebTestContextBootstrapper";
private static final String WEB_APP_CONFIGURATION_ANNOTATION_CLASS_NAME =
"org.springframework.test.context.web.WebAppConfiguration";
private static final Class webAppConfigurationClass = loadWebAppConfigurationClass();
private static final Log logger = LogFactory.getLog(BootstrapUtils.class);
/**
* Create the {@code BootstrapContext} for the specified {@linkplain Class test class}.
*
Uses reflection to create a {@link org.springframework.test.context.support.DefaultBootstrapContext}.
* that uses a {@link org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate}.
* @param testClass the test class for which the bootstrap context should be created
* @return a new {@code BootstrapContext}; never {@code null}
*/
@SuppressWarnings("unchecked")
static BootstrapContext createBootstrapContext(Class testClass) {
CacheAwareContextLoaderDelegate cacheAwareContextLoaderDelegate = createCacheAwareContextLoaderDelegate();
String className = DEFAULT_BOOTSTRAP_CONTEXT_CLASS_NAME;
Class clazz = null;
try {
clazz = (Class)
ClassUtils.forName(className, BootstrapUtils.class.getClassLoader());
Constructor constructor =
clazz.getConstructor(Class.class, CacheAwareContextLoaderDelegate.class);
logger.trace(LogMessage.format("Instantiating BootstrapContext using constructor [%s]", constructor));
return BeanUtils.instantiateClass(constructor, testClass, cacheAwareContextLoaderDelegate);
}
catch (Throwable ex) {
throw new IllegalStateException("Could not load BootstrapContext [%s]".formatted(className), ex);
}
}
@SuppressWarnings("unchecked")
private static CacheAwareContextLoaderDelegate createCacheAwareContextLoaderDelegate() {
String className = DEFAULT_CACHE_AWARE_CONTEXT_LOADER_DELEGATE_CLASS_NAME;
Class clazz = null;
try {
clazz = (Class)
ClassUtils.forName(className, BootstrapUtils.class.getClassLoader());
logger.trace(LogMessage.format("Instantiating CacheAwareContextLoaderDelegate from class [%s]", className));
return BeanUtils.instantiateClass(clazz, CacheAwareContextLoaderDelegate.class);
}
catch (Throwable ex) {
throw new IllegalStateException("Could not load CacheAwareContextLoaderDelegate [%s]".formatted(className), ex);
}
}
/**
* Resolve the {@link TestContextBootstrapper} type for the supplied test class
* using the default {@link BootstrapContext}, instantiate the bootstrapper,
* and provide it a reference to the {@code BootstrapContext}.
*
If the {@link BootstrapWith @BootstrapWith} annotation is present on
* the test class, either directly or as a meta-annotation, then its
* {@link BootstrapWith#value value} will be used as the bootstrapper type.
* Otherwise, either the
* {@link org.springframework.test.context.support.DefaultTestContextBootstrapper
* DefaultTestContextBootstrapper} or the
* {@link org.springframework.test.context.web.WebTestContextBootstrapper
* WebTestContextBootstrapper} will be used, depending on the presence of
* {@link org.springframework.test.context.web.WebAppConfiguration @WebAppConfiguration}.
* @param testClass the test class for which the bootstrapper should be created
* @return a fully configured {@code TestContextBootstrapper}
* @since 6.0
*/
public static TestContextBootstrapper resolveTestContextBootstrapper(Class testClass) {
return resolveTestContextBootstrapper(createBootstrapContext(testClass));
}
/**
* Resolve the {@link TestContextBootstrapper} type for the test class in the
* supplied {@link BootstrapContext}, instantiate it, and provide it a reference
* to the {@link BootstrapContext}.
*
If the {@link BootstrapWith @BootstrapWith} annotation is present on
* the test class, either directly or as a meta-annotation, then its
* {@link BootstrapWith#value value} will be used as the bootstrapper type.
* Otherwise, either the
* {@link org.springframework.test.context.support.DefaultTestContextBootstrapper
* DefaultTestContextBootstrapper} or the
* {@link org.springframework.test.context.web.WebTestContextBootstrapper
* WebTestContextBootstrapper} will be used, depending on the presence of
* {@link org.springframework.test.context.web.WebAppConfiguration @WebAppConfiguration}.
* @param bootstrapContext the bootstrap context to use
* @return a fully configured {@code TestContextBootstrapper}
*/
static TestContextBootstrapper resolveTestContextBootstrapper(BootstrapContext bootstrapContext) {
Class testClass = bootstrapContext.getTestClass();
Class clazz = null;
try {
clazz = resolveExplicitTestContextBootstrapper(testClass);
if (clazz == null) {
clazz = resolveDefaultTestContextBootstrapper(testClass);
}
logger.trace(LogMessage.format("Instantiating TestContextBootstrapper for test class [%s] from class [%s]",
testClass.getName(), clazz.getName()));
TestContextBootstrapper testContextBootstrapper =
BeanUtils.instantiateClass(clazz, TestContextBootstrapper.class);
testContextBootstrapper.setBootstrapContext(bootstrapContext);
return testContextBootstrapper;
}
catch (IllegalStateException ex) {
throw ex;
}
catch (Throwable ex) {
throw new IllegalStateException("""
Could not load TestContextBootstrapper [%s]. Specify @BootstrapWith's 'value' \
attribute or make the default bootstrapper class available.""".formatted(clazz), ex);
}
}
@Nullable
private static Class resolveExplicitTestContextBootstrapper(Class testClass) {
Set annotations = new LinkedHashSet<>();
AnnotationDescriptor descriptor =
TestContextAnnotationUtils.findAnnotationDescriptor(testClass, BootstrapWith.class);
while (descriptor != null) {
annotations.addAll(descriptor.findAllLocalMergedAnnotations());
descriptor = descriptor.next();
}
if (annotations.isEmpty()) {
return null;
}
if (annotations.size() == 1) {
return annotations.iterator().next().value();
}
// Allow directly-present annotation to override annotations that are meta-present.
BootstrapWith bootstrapWith = testClass.getDeclaredAnnotation(BootstrapWith.class);
if (bootstrapWith != null) {
return bootstrapWith.value();
}
throw new IllegalStateException(String.format(
"Configuration error: found multiple declarations of @BootstrapWith for test class [%s]: %s",
testClass.getName(), annotations));
}
private static Class resolveDefaultTestContextBootstrapper(Class testClass) throws Exception {
boolean webApp = TestContextAnnotationUtils.hasAnnotation(testClass, webAppConfigurationClass);
String bootstrapperClassName = (webApp ? DEFAULT_WEB_TEST_CONTEXT_BOOTSTRAPPER_CLASS_NAME :
DEFAULT_TEST_CONTEXT_BOOTSTRAPPER_CLASS_NAME);
return ClassUtils.forName(bootstrapperClassName, BootstrapUtils.class.getClassLoader());
}
@SuppressWarnings("unchecked")
private static Class loadWebAppConfigurationClass() {
try {
return (Class) ClassUtils.forName(WEB_APP_CONFIGURATION_ANNOTATION_CLASS_NAME,
BootstrapUtils.class.getClassLoader());
}
catch (ClassNotFoundException | LinkageError ex) {
throw new IllegalStateException(
"Failed to load class for @" + WEB_APP_CONFIGURATION_ANNOTATION_CLASS_NAME, ex);
}
}
}