[GitHub] incubator-predictionio-template-skeleton issue #5: Example Tests

[mars]

Github user mars commented on the issue:

    https://github.com/apache/incubator-predictionio-template-skeleton/pull/5
  
    I've been trying to support `DataSourceTest` using an in-memory H2 
database. Unfortunately, that's currently failing with:
    
    ```
    [info] DataSourceTest:
    [info] readTraining
    [info] - should return the data *** FAILED ***
    [info]   java.lang.IllegalStateException: Connection pool is not yet 
initialized.(name:'default)
    [info]   at 
scalikejdbc.ConnectionPool$$anonfun$get$1.apply(ConnectionPool.scala:57)
    [info]   at 
scalikejdbc.ConnectionPool$$anonfun$get$1.apply(ConnectionPool.scala:55)
    [info]   at scala.Option.getOrElse(Option.scala:120)
    [info]   at scalikejdbc.ConnectionPool$.get(ConnectionPool.scala:55)
    [info]   at scalikejdbc.ConnectionPool$.apply(ConnectionPool.scala:46)
    [info]   at scalikejdbc.DB$.connectionPool(DB.scala:150)
    [info]   at scalikejdbc.DB$.autoCommit(DB.scala:213)
    [info]   at 
org.apache.predictionio.data.storage.jdbc.JDBCApps.<init>(JDBCApps.scala:32)
    [info]   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native 
Method)
    [info]   at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    ```
    
    …which seems to be caused by [this `DB autoCommit` call in the JDBC 
initializer](https://github.com/apache/incubator-predictionio/blob/release/0.10.0/data/src/main/scala/org/apache/predictionio/data/storage/jdbc/JDBCApps.scala#L32).


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