Pattern for creating a graph of Test objects?

I have to write Unit Tests for a method which requires a complex object Graph. Currently I am writing a Create method for each Test as shown below.

1. private static Entity Create_ObjectGraph_For_Test1()
2. private static Entity Create_ObjectGraph_For_Test2()
...... And So on

The create method has about 10 Steps and they might vary 开发者_开发百科by 1-2 steps with each other. What is the best way to Create complex object graph. Apart from creating a Create method for each Test I can add parameter to a single Create methods but that might become confusing if the no of Tests are about 10 or so.

You can extract the steps into methods, possibly parametrizing them, and make them chain-able so that one can write:

Entity myGraph = GraphFactory.createGraph().step1().step2(<parm>).step3(<parm>);

Choising meaningful names makes the fixture readable.

It may be possible to put a substantial amount of common setup code into - well, of course: the setup() method, and then modify the object graph slightly for each individual test. If the setups for the different tests are sufficiently different, then I would encourage you to put the tests into separate classes and their setup into each test class independently.