Scala play：H2“HikariDataSource已关闭。”

Question

我想在内存数据库使用此代码运行我的测试：

class MySpec extends PlaySpec with OneAppPerSuite { 

    Databases.withInMemory(
    name = "test", 
    urlOptions = Map(
     "MODE" -> "MYSQL", 
     "DATABASE_TO_UPPER" -> "false", 
     "DB_CLOSE_DELAY" -> "-1" 
    ), 
    config = Map(
     "logStatements" -> true, 
     "lazyInit" -> true, 
     "username" -> "sa", 
     "password" -> "" 
    ) 
) { TestDb => 

    "DataManagementController" should {"connect" in { 
     TestDb.withConnection(conn => 0) // do nothing, but connect 
    }} 

    } 
} 

，但我收到此错误：执行测试之前“HikariDataSource已关闭”：

[info] DataManagementController 
[info] - should connect *** FAILED *** 
[info] java.sql.SQLException: HikariDataSource HikariDataSource (HikariPool-1) has been closed. 
[info] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:79) 
[info] at play.api.db.DefaultDatabase.getConnection(Databases.scala:142) 
[info] at play.api.db.DefaultDatabase.withConnection(Databases.scala:152) 
[info] at play.api.db.DefaultDatabase.withConnection(Databases.scala:148) 
[info] at ControllerSpec$$anonfun$1$$anonfun$apply$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ControllerSpec.scala:37) 
[info] at ControllerSpec$$anonfun$1$$anonfun$apply$1$$anonfun$apply$mcV$sp$1.apply(ControllerSpec.scala:37) 
[info] at ControllerSpec$$anonfun$1$$anonfun$apply$1$$anonfun$apply$mcV$sp$1.apply(ControllerSpec.scala:37) 
[info] at org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22) 
[info] at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85) 
[info] at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104) 
[info] ... 

我在做什么错？

Answer 1

当您使用OneAppPerSuite，游戏会为每间套房启动一个应用实例。在你的情况下，你正在创建一个测试数据库，在应用程序准备就绪之前。所以，你必须在你的代码的顺序颠倒的东西是这样的：

"DataManagementController" should { 
    "connect" in { 
     Databases.withInMemory(
      // Options and config here 
     ) { TestDb => 
      TestDb.withConnection(conn => 0) 
     } 
    } 
} 

您也可以封装在数据库初始化部分，使之更容易在需要的是DB每个测试使用：

def testDB[T](block: Database => T) = { 
    Databases.withInMemory(
     name = "test", 
     urlOptions = Map(
     "MODE" -> "MYSQL", 
     "DATABASE_TO_UPPER" -> "false", 
     "DB_CLOSE_DELAY" -> "-1" 
    ), 
     config = Map(
     "logStatements" -> true, 
     "lazyInit" -> true, 
     "username" -> "sa", 
     "password" -> "" 
    ) 
    ) { block } 
    } 

然后用它是这样的：

"DataManagementController" should { 
    "connect" in { 
     testDB { db => db.withConnection(conn => 0) } 
    } 
} 

来源：https://www.playframework.com/documentation/2.5.x/ScalaTestingWithDatabases