java.lang.Object
- org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager

```
public class TestEntityManager
extends Object
```
Alternative to EntityManager for use in JPA tests. Provides a subset of EntityManager methods that are useful for tests as well as helper methods for common testing tasks such as persist/flush/find.
从以下版本开始:
1.4.0

构造器概要
构造器
构造器说明
TestEntityManager(javax.persistence.EntityManagerFactory entityManagerFactory)
Create a new TestEntityManager instance for the given EntityManagerFactory.

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`void`	`clear()`	Clear the persistence context, causing all managed entities to become detached.
`void`	`detach(Object entity)`	Remove the given entity from the persistence context, causing a managed entity to become detached.
`<E> E`	`find(Class<E> entityClass, Object primaryKey)`	Find by primary key.
`void`	`flush()`	Synchronize the persistence context to the underlying database.
`javax.persistence.EntityManager`	`getEntityManager()`	Return the underlying `EntityManager` that's actually used to perform all operations.
`Object`	`getId(Object entity)`	Return the ID of the given entity.
`<T> T`	`getId(Object entity, Class<T> idType)`	Return the ID of the given entity cast to a specific type.
`<E> E`	`merge(E entity)`	Merge the state of the given entity into the current persistence context.
`<E> E`	`persist(E entity)`	Make an instance managed and persistent.
`<E> E`	`persistAndFlush(E entity)`	Make an instance managed and persistent then synchronize the persistence context to the underlying database.
`Object`	`persistAndGetId(Object entity)`	Make an instance managed and persistent then return it's ID.
`<T> T`	`persistAndGetId(Object entity, Class<T> idType)`	Make an instance managed and persistent then return it's ID.
`<E> E`	`persistFlushFind(E entity)`	Make an instance managed and persistent, synchronize the persistence context to the underlying database and finally find the persisted entity by its ID.
`<E> E`	`refresh(E entity)`	Refresh the state of the instance from the database, overwriting changes made to the entity, if any.
`void`	`remove(Object entity)`	Remove the entity instance.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - TestEntityManager
```
public TestEntityManager(javax.persistence.EntityManagerFactory entityManagerFactory)
```
    Create a new TestEntityManager instance for the given EntityManagerFactory.
    参数:
    entityManagerFactory - the source entity manager factory
- 方法详细资料
  - persistAndGetId
```
public Object persistAndGetId(Object entity)
```
    Make an instance managed and persistent then return it's ID. Delegates to EntityManager.persist(Object) then getId(Object).
    Helpful when setting up test data in a test:
    Object entityId = this.testEntityManager.persist(new MyEntity("Spring"));
    参数:
    entity - the source entity
    返回:
    the ID of the newly persisted entity
  - persistAndGetId
```
public <T> T persistAndGetId(Object entity,
                             Class<T> idType)
```
    Make an instance managed and persistent then return it's ID. Delegates to EntityManager.persist(Object) then getId(Object, Class).
    Helpful when setting up test data in a test:
    Long entityId = this.testEntityManager.persist(new MyEntity("Spring"), Long.class);
    类型参数:
    T - the ID type
    参数:
    entity - the source entity
    idType - the ID type
    返回:
    the ID of the newly persisted entity
  - persist
```
public <E> E persist(E entity)
```
    Make an instance managed and persistent. Delegates to EntityManager.persist(Object) then returns the original source entity.
    Helpful when setting up test data in a test:
    MyEntity entity = this.testEntityManager.persist(new MyEntity("Spring"));
    类型参数:
    E - the entity type
    参数:
    entity - the entity to persist
    返回:
    the persisted entity
  - persistFlushFind
```
public <E> E persistFlushFind(E entity)
```
    Make an instance managed and persistent, synchronize the persistence context to the underlying database and finally find the persisted entity by its ID. Delegates to persistAndFlush(Object) then find(Class, Object) with the entity ID.
    Helpful when ensuring that entity data is actually written and read from the underlying database correctly.
    类型参数:
    E - the entity type
    参数:
    entity - the entity to persist
    返回:
    the entity found using the ID of the persisted entity
  - persistAndFlush
```
public <E> E persistAndFlush(E entity)
```
    Make an instance managed and persistent then synchronize the persistence context to the underlying database. Delegates to EntityManager.persist(Object) then flush() and finally returns the original source entity.
    Helpful when setting up test data in a test:
    MyEntity entity = this.testEntityManager.persistAndFlush(new MyEntity("Spring"));
    类型参数:
    E - the entity type
    参数:
    entity - the entity to persist
    返回:
    the persisted entity
  - merge
```
public <E> E merge(E entity)
```
    Merge the state of the given entity into the current persistence context. Delegates to EntityManager.merge(Object)
    类型参数:
    E - the entity type
    参数:
    entity - the entity to merge
    返回:
    the merged entity
  - remove
```
public void remove(Object entity)
```
    Remove the entity instance. Delegates to EntityManager.remove(Object)
    参数:
    entity - the entity to remove
  - find
```
public <E> E find(Class<E> entityClass,
                  Object primaryKey)
```
    Find by primary key. Delegates to EntityManager.find(Class, Object).
    类型参数:
    E - the entity type
    参数:
    entityClass - the entity class
    primaryKey - the entity primary key
    返回:
    the found entity or null if the entity does not exist
    另请参阅:
    getId(Object)
  - flush
```
public void flush()
```
    Synchronize the persistence context to the underlying database. Delegates to EntityManager.flush().
  - refresh
```
public <E> E refresh(E entity)
```
    Refresh the state of the instance from the database, overwriting changes made to the entity, if any. Delegates to EntityManager.refresh(Object).
    类型参数:
    E - the entity type
    参数:
    entity - the entity to refresh
    返回:
    the refreshed entity
  - clear
```
public void clear()
```
    Clear the persistence context, causing all managed entities to become detached. Delegates to EntityManager.clear()
  - detach
```
public void detach(Object entity)
```
    Remove the given entity from the persistence context, causing a managed entity to become detached. Delegates to EntityManager.detach(Object).
    参数:
    entity - the entity to detach.
  - getId
```
public Object getId(Object entity)
```
    Return the ID of the given entity. Delegates to PersistenceUnitUtil.getIdentifier(Object).
    参数:
    entity - the source entity
    返回:
    the ID of the entity or null
    另请参阅:
    getId(Object, Class)
  - getId
```
public <T> T getId(Object entity,
                   Class<T> idType)
```
    Return the ID of the given entity cast to a specific type. Delegates to PersistenceUnitUtil.getIdentifier(Object).
    类型参数:
    T - the ID type
    参数:
    entity - the source entity
    idType - the expected ID type
    返回:
    the ID of the entity or null
    另请参阅:
    getId(Object)
  - getEntityManager
```
public final javax.persistence.EntityManager getEntityManager()
```
    Return the underlying EntityManager that's actually used to perform all operations.
    返回:
    the entity manager

类 TestEntityManager

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

TestEntityManager

方法详细资料

persistAndGetId

persistAndGetId

persist

persistFlushFind

persistAndFlush

merge

remove

find

flush

refresh

clear

detach

getId

getId

getEntityManager