org.springframework.boot.test.context.runner

Class AbstractApplicationContextRunner<SELF extends AbstractApplicationContextRunner<SELF,C,A>,C extends ConfigurableApplicationContext,A extends ApplicationContextAssertProvider<C>>

java.lang.Object

org.springframework.boot.test.context.runner.AbstractApplicationContextRunner<SELF,C,A>

Type Parameters:

SELF - The "self" type for this runner

C - The context type

A - The application context assertion provider

Direct Known Subclasses:

ApplicationContextRunner, ReactiveWebApplicationContextRunner, WebApplicationContextRunner

public abstract class AbstractApplicationContextRunner<SELF extends AbstractApplicationContextRunner<SELF,C,A>,C extends ConfigurableApplicationContext,A extends ApplicationContextAssertProvider<C>>
extends Object

Utility design to run and an ApplicationContext and provide AssertJ style assertions. The test is best used as a field of a test class, describing the shared configuration required for the test:

 public class MyContextTests {
     private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
             .withPropertyValues("spring.foo=bar")
             .withUserConfiguration(MyConfiguration.class);
 }

The initialization above makes sure to register MyConfiguration for all tests and set the spring.foo property to bar unless specified otherwise.

Based on the configuration above, a specific test can simulate what will happen when the context runs, perhaps with overridden property values:

 @Test
 public someTest() {
     this.contextRunner.withPropertyValues("spring.foo=biz").run((context) -> {
         assertThat(context).containsSingleBean(MyBean.class);
         // other assertions
     });
 }

The test above has changed the spring.foo property to biz and is asserting that the context contains a single MyBean bean. The run method takes a ContextConsumer that can apply assertions to the context. Upon completion, the context is automatically closed.

If the application context fails to start the #run(ContextConsumer) method is called with a "failed" application context. Calls to the context will throw an IllegalStateException and assertions that expect a running context will fail. The getFailure() assertion can be used if further checks are required on the cause of the failure:

 @Test
 public someTest() {
     this.context.withPropertyValues("spring.foo=fails").run((loaded) -> {
         assertThat(loaded).getFailure().hasCauseInstanceOf(BadPropertyException.class);
         // other assertions
     });
 }

Since:

2.0.0

Author:

Stephane Nicoll, Andy Wilkinson, Phillip Webb

See Also:

ApplicationContextRunner, WebApplicationContextRunner, ReactiveWebApplicationContextRunner, ApplicationContextAssert

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractApplicationContextRunner(Supplier<C> contextFactory) Create a new AbstractApplicationContextRunner instance.
protected	AbstractApplicationContextRunner(Supplier<C> contextFactory, List<ApplicationContextInitializer<C>> initializers, TestPropertyValues environmentProperties, TestPropertyValues systemProperties, ClassLoader classLoader, ApplicationContext parent, List<Configurations> configurations) Create a new AbstractApplicationContextRunner instance.

Method Summary

Modifier and Type	Method and Description
protected abstract SELF	newInstance(Supplier<C> contextFactory, List<ApplicationContextInitializer<C>> initializers, TestPropertyValues environmentProperties, TestPropertyValues systemProperties, ClassLoader classLoader, ApplicationContext parent, List<Configurations> configurations)
SELF	run(ContextConsumer<? super A> consumer) Create and refresh a new ApplicationContext based on the current state of this loader.
SELF	with(Function<SELF,SELF> customizer) Apply customization to this runner.
SELF	withClassLoader(ClassLoader classLoader) Customize the ClassLoader that the ApplicationContext should use.
SELF	withConfiguration(Configurations configurations) Register the specified configuration classes with the ApplicationContext.
SELF	withInitializer(ApplicationContextInitializer<C> initializer) Add a ApplicationContextInitializer to be called when the context is created.
SELF	withParent(ApplicationContext parent) Configure the parent of the ApplicationContext.
SELF	withPropertyValues(String... pairs) Add the specified Environment property pairs.
SELF	withSystemProperties(String... pairs) Add the specified System property pairs.
SELF	withUserConfiguration(Class<?>... configurationClasses) Register the specified user configuration classes with the ApplicationContext.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractApplicationContextRunner

protected AbstractApplicationContextRunner(Supplier<C> contextFactory)

Create a new AbstractApplicationContextRunner instance.

Parameters:

contextFactory - the factory used to create the actual context

AbstractApplicationContextRunner

protected AbstractApplicationContextRunner(Supplier<C> contextFactory,
                                           List<ApplicationContextInitializer<C>> initializers,
                                           TestPropertyValues environmentProperties,
                                           TestPropertyValues systemProperties,
                                           ClassLoader classLoader,
                                           ApplicationContext parent,
                                           List<Configurations> configurations)

Create a new AbstractApplicationContextRunner instance.

Parameters:

contextFactory - the factory used to create the actual context

initializers - the initializers

environmentProperties - the environment properties

systemProperties - the system properties

classLoader - the class loader

parent - the parent

configurations - the configuration

Method Detail

withInitializer

public SELF withInitializer(ApplicationContextInitializer<C> initializer)

Add a ApplicationContextInitializer to be called when the context is created.

Parameters:

initializer - the initializer to add

Returns:

a new instance with the updated initializers

withPropertyValues

public SELF withPropertyValues(String... pairs)

Add the specified Environment property pairs. Key-value pairs can be specified with colon (":") or equals ("=") separators. Override matching keys that might have been specified previously.

Parameters:

pairs - the key-value pairs for properties that need to be added to the environment

Returns:

a new instance with the updated property values

See Also:

TestPropertyValues, withSystemProperties(String...)

withSystemProperties

public SELF withSystemProperties(String... pairs)

Add the specified System property pairs. Key-value pairs can be specified with colon (":") or equals ("=") separators. System properties are added before the context is run and restored when the context is closed.

Parameters:

pairs - the key-value pairs for properties that need to be added to the system

Returns:

a new instance with the updated system properties

See Also:

TestPropertyValues, withSystemProperties(String...)

withClassLoader

public SELF withClassLoader(ClassLoader classLoader)

Customize the ClassLoader that the ApplicationContext should use. Customizing the ClassLoader is an effective manner to hide resources from the classpath.

Parameters:

classLoader - the classloader to use (can be null to use the default)

Returns:

a new instance with the updated class loader

See Also:

FilteredClassLoader

withParent

public SELF withParent(ApplicationContext parent)

Configure the parent of the ApplicationContext.

Parameters:

parent - the parent

Returns:

a new instance with the updated parent

withUserConfiguration

public SELF withUserConfiguration(Class<?>... configurationClasses)

Register the specified user configuration classes with the ApplicationContext.

Parameters:

configurationClasses - the user configuration classes to add

Returns:

a new instance with the updated configuration

withConfiguration

public SELF withConfiguration(Configurations configurations)

Register the specified configuration classes with the ApplicationContext.

Parameters:

configurations - the configurations to add

Returns:

a new instance with the updated configuration

with

public SELF with(Function<SELF,SELF> customizer)

Apply customization to this runner.

Parameters:

customizer - the customizer to call

Returns:

a new instance with the customizations applied

newInstance

protected abstract SELF newInstance(Supplier<C> contextFactory,
                                    List<ApplicationContextInitializer<C>> initializers,
                                    TestPropertyValues environmentProperties,
                                    TestPropertyValues systemProperties,
                                    ClassLoader classLoader,
                                    ApplicationContext parent,
                                    List<Configurations> configurations)

run

public SELF run(ContextConsumer<? super A> consumer)

Create and refresh a new ApplicationContext based on the current state of this loader. The context is consumed by the specified consumer and closed upon completion.

Parameters:

consumer - the consumer of the created ApplicationContext

Returns:

this instance