Test smell: poor code organization

[TestSmell]

Hi!

We notice that you mix the test code with the production code.
For example, a test case in the ''neo4j-tutorial/blob/master/src/koan/java/org/neo4j/tutorial/Koan11.java'' path.
In your project, ''.../src/...'' is the folder for placing production code and ''.../test/...'' is the folder for test code.
But you lace the test code in the production folder.
It is a bad programming practice.
Thus, we suggest you'd better re-organize your test code. Thanks.