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I am collecting data and store this data in a MySQL database using Java. Additionally, I use Maven for building the project, TestNG as a test framework, and Spring-Jdbc for accessing the database. I've implemented a DAO layer that encapsulates the access to the database. Besides adding data using the DAO classes I want to execute some queries which aggregate the data and store the results in some other tables (like materialized views). Now, I would like to write some testcases which check whether the DAO classes are working as they should. Therefore, I thought of using an in-memory database which will be populated with some test data. Since I am also using MySQL-specific SQL queries for aggregating data, I went into some trouble: Firstly, I've thought of simply using the embedded-database functionality provided by Spring-Jdbc to instantiate an embedded database. I've decided to use the H2 implementation. There I ran into trouble because of the aggregation queries, which are using MySQL-specific content (e.g. time-manipulation functions like DATE()). Another disadvantage of this approach is that I need to maintain two ddl files - the actual ddl file defining the tables in MySQL (here I define the encoding and add comments to tables and columns, both features are MySQL-specific); and the test ddl file that defines the same tables but without comments etc. since H2 does not support comments. I've found a description for using MySQL as an embedded database which I can use within the test cases (http://literatitech.blogspot.de/2011/04/embedded-mysql-server-for-junit-testing.html). That sounded really promising to me. Unfortunately, it didn't worked: A MissingResourceExcpetion occurred "Resource '5-0-21/Linux-amd64/mysqld' not found". It seems that the driver is not able to find the database daemon on my local machine. But I don't know what I have to look for to find a solution for that issue. Now, I am a little bit stuck a

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