org.springframework.test.context.support

Class AbstractTestContextBootstrapper

java.lang.Object

org.springframework.test.context.support.AbstractTestContextBootstrapper

All Implemented Interfaces:

TestContextBootstrapper

Direct Known Subclasses:

DefaultTestContextBootstrapper

public abstract class AbstractTestContextBootstrapper
extends Object
implements TestContextBootstrapper

Abstract implementation of the TestContextBootstrapper interface which provides most of the behavior required by a bootstrapper.

Concrete subclasses typically will only need to provide implementations for the following methods:

• getDefaultContextLoaderClass(java.lang.Class<?>)
• processMergedContextConfiguration(org.springframework.test.context.MergedContextConfiguration)

To plug in custom ContextCache support, override getCacheAwareContextLoaderDelegate().

Since:

4.1

Author:

Sam Brannen, Juergen Hoeller

Constructor Summary

Constructors

Constructor and Description
AbstractTestContextBootstrapper()

Method Summary

Modifier and Type	Method and Description
MergedContextConfiguration	buildMergedContextConfiguration() Build the merged context configuration for the test class in the BootstrapContext associated with this bootstrapper.
TestContext	buildTestContext() Build a new DefaultTestContext using the test class in the BootstrapContext associated with this bootstrapper and by delegating to buildMergedContextConfiguration() and getCacheAwareContextLoaderDelegate().
BootstrapContext	getBootstrapContext() Get the BootstrapContext associated with this bootstrapper.
protected CacheAwareContextLoaderDelegate	getCacheAwareContextLoaderDelegate() Get the CacheAwareContextLoaderDelegate to use for transparent interaction with the ContextCache.
protected abstract Class<? extends ContextLoader>	getDefaultContextLoaderClass(Class<?> testClass) Determine the default ContextLoader class to use for the supplied test class.
protected Set<Class<? extends TestExecutionListener>>	getDefaultTestExecutionListenerClasses() Get the default TestExecutionListener classes for this bootstrapper.
protected List<String>	getDefaultTestExecutionListenerClassNames() Get the names of the default TestExecutionListener classes for this bootstrapper.
List<TestExecutionListener>	getTestExecutionListeners() Get a list of newly instantiated TestExecutionListeners for the test class in the BootstrapContext associated with this bootstrapper.
protected MergedContextConfiguration	processMergedContextConfiguration(MergedContextConfiguration mergedConfig) Process the supplied, newly instantiated MergedContextConfiguration instance.
protected ContextLoader	resolveContextLoader(Class<?> testClass, List<ContextConfigurationAttributes> configAttributesList) Resolve the ContextLoader class to use for the supplied list of ContextConfigurationAttributes and then instantiate and return that ContextLoader.
protected Class<? extends ContextLoader>	resolveExplicitContextLoaderClass(List<ContextConfigurationAttributes> configAttributesList) Resolve the ContextLoader class to use for the supplied list of ContextConfigurationAttributes.
void	setBootstrapContext(BootstrapContext bootstrapContext) Set the BootstrapContext to be used by this bootstrapper.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractTestContextBootstrapper

public AbstractTestContextBootstrapper()

Method Detail

setBootstrapContext

public void setBootstrapContext(BootstrapContext bootstrapContext)

Set the BootstrapContext to be used by this bootstrapper.

Specified by:

setBootstrapContext in interface TestContextBootstrapper

getBootstrapContext

public BootstrapContext getBootstrapContext()

Get the BootstrapContext associated with this bootstrapper.

Specified by:

getBootstrapContext in interface TestContextBootstrapper

buildTestContext

public TestContext buildTestContext()

Build a new DefaultTestContext using the test class in the BootstrapContext associated with this bootstrapper and by delegating to buildMergedContextConfiguration() and getCacheAwareContextLoaderDelegate().

Concrete subclasses may choose to override this method to return a custom TestContext implementation.

Specified by:

buildTestContext in interface TestContextBootstrapper

Returns:

a new TestContext, never null

Since:

4.2

See Also:

TestContextBootstrapper.buildMergedContextConfiguration()

getTestExecutionListeners

public final List<TestExecutionListener> getTestExecutionListeners()

Get a list of newly instantiated TestExecutionListeners for the test class in the BootstrapContext associated with this bootstrapper.

If @TestExecutionListeners is not present on the test class in the BootstrapContext, default listeners should be returned. Furthermore, default listeners must be sorted using AnnotationAwareOrderComparator.

Concrete implementations are free to determine what comprises the set of default listeners. However, by default, the Spring TestContext Framework will use the SpringFactoriesLoader mechanism to look up all TestExecutionListener class names configured in all META-INF/spring.factories files on the classpath.

The inheritListeners flag of @TestExecutionListeners must be taken into consideration. Specifically, if the inheritListeners flag is set to true, listeners declared for a given test class must be appended to the end of the list of listeners declared in superclasses.

Specified by:

getTestExecutionListeners in interface TestContextBootstrapper

Returns:

a list of TestExecutionListener instances

getDefaultTestExecutionListenerClasses

protected Set<Class<? extends TestExecutionListener>> getDefaultTestExecutionListenerClasses()

Get the default TestExecutionListener classes for this bootstrapper.

This method is invoked by getTestExecutionListeners() and delegates to getDefaultTestExecutionListenerClassNames() to retrieve the class names.

If a particular class cannot be loaded, a DEBUG message will be logged, but the associated exception will not be rethrown.

getDefaultTestExecutionListenerClassNames

protected List<String> getDefaultTestExecutionListenerClassNames()

Get the names of the default TestExecutionListener classes for this bootstrapper.

The default implementation looks up all org.springframework.test.context.TestExecutionListener entries configured in all META-INF/spring.factories files on the classpath.

This method is invoked by getDefaultTestExecutionListenerClasses().

Returns:

an unmodifiable list of names of default TestExecutionListener classes

See Also:

SpringFactoriesLoader.loadFactoryNames(java.lang.Class<?>, java.lang.ClassLoader)

buildMergedContextConfiguration

public final MergedContextConfiguration buildMergedContextConfiguration()

Build the merged context configuration for the test class in the BootstrapContext associated with this bootstrapper.

Implementations must take the following into account when building the merged configuration:

• Context hierarchies declared via @ContextHierarchy and @ContextConfiguration
• Active bean definition profiles declared via @ActiveProfiles
• Context initializers declared via ContextConfiguration.initializers()
• Test property sources declared via @TestPropertySource

Consult the Javadoc for the aforementioned annotations for details on the required semantics.

Note that the implementation of TestContextBootstrapper.buildTestContext() should typically delegate to this method when constructing the TestContext.

When determining which ContextLoader to use for a given test class, the following algorithm should be used:

1. If a ContextLoader class has been explicitly declared via ContextConfiguration.loader(), use it.
2. Otherwise, concrete implementations are free to determine which ContextLoader class to use as as default.

Specified by:

buildMergedContextConfiguration in interface TestContextBootstrapper

Returns:

the merged context configuration, never null

See Also:

TestContextBootstrapper.buildTestContext()

resolveContextLoader

protected ContextLoader resolveContextLoader(Class<?> testClass,
                                             List<ContextConfigurationAttributes> configAttributesList)

Resolve the ContextLoader class to use for the supplied list of ContextConfigurationAttributes and then instantiate and return that ContextLoader.

If the user has not explicitly declared which loader to use, the value returned from getDefaultContextLoaderClass(java.lang.Class<?>) will be used as the default context loader class. For details on the class resolution process, see resolveExplicitContextLoaderClass(java.util.List<org.springframework.test.context.ContextConfigurationAttributes>) and getDefaultContextLoaderClass(java.lang.Class<?>).

Parameters:

testClass - the test class for which the ContextLoader should be resolved; must not be null

configAttributesList - the list of configuration attributes to process; must not be null or empty; must be ordered bottom-up (i.e., as if we were traversing up the class hierarchy)

Returns:

the resolved ContextLoader for the supplied testClass (never null)

Throws:

IllegalStateException - if getDefaultContextLoaderClass(Class) returns null

resolveExplicitContextLoaderClass

protected Class<? extends ContextLoader> resolveExplicitContextLoaderClass(List<ContextConfigurationAttributes> configAttributesList)

Resolve the ContextLoader class to use for the supplied list of ContextConfigurationAttributes.

Beginning with the first level in the context configuration attributes hierarchy:

1. If the contextLoaderClass property of ContextConfigurationAttributes is configured with an explicit class, that class will be returned.
2. If an explicit ContextLoader class is not specified at the current level in the hierarchy, traverse to the next level in the hierarchy and return to step #1.

Parameters:

configAttributesList - the list of configuration attributes to process; must not be null or empty; must be ordered bottom-up (i.e., as if we were traversing up the class hierarchy)

Returns:

the ContextLoader class to use for the supplied configuration attributes, or null if no explicit loader is found

Throws:

IllegalArgumentException - if supplied configuration attributes are null or empty

getCacheAwareContextLoaderDelegate

protected CacheAwareContextLoaderDelegate getCacheAwareContextLoaderDelegate()

Get the CacheAwareContextLoaderDelegate to use for transparent interaction with the ContextCache.

The default implementation simply delegates to getBootstrapContext().getCacheAwareContextLoaderDelegate().

Concrete subclasses may choose to override this method to return a custom CacheAwareContextLoaderDelegate implementation with custom ContextCache support.

Returns:

the context loader delegate (never null)

getDefaultContextLoaderClass

protected abstract Class<? extends ContextLoader> getDefaultContextLoaderClass(Class<?> testClass)

Determine the default ContextLoader class to use for the supplied test class.

The class returned by this method will only be used if a ContextLoader class has not been explicitly declared via ContextConfiguration.loader().

Parameters:

testClass - the test class for which to retrieve the default ContextLoader class

Returns:

the default ContextLoader class for the supplied test class (never null)

processMergedContextConfiguration

protected MergedContextConfiguration processMergedContextConfiguration(MergedContextConfiguration mergedConfig)

Process the supplied, newly instantiated MergedContextConfiguration instance.

The returned MergedContextConfiguration instance may be a wrapper around or a replacement for the original.

The default implementation simply returns the supplied instance unmodified.

Concrete subclasses may choose to return a specialized subclass of MergedContextConfiguration based on properties in the supplied instance.

Parameters:

mergedConfig - the MergedContextConfiguration to process; never null

Returns:

a fully initialized MergedContextConfiguration; never null