Testing the model

[vismate]

We should begin to write tests to validate the model.

We should test:

• No input connection
• Invalid input value
• Built-in node correctness
• What happens if there is a cycle in the graph

Are there any ideas what else should be tested in the current implementation?

[AMIOL7]

I think, it would be nice to test the evaluation of the graph @vismate

[bgdxqi]

Some tests have been created checking the connections of the nodes and the built-in node correctness. 2 Issues have been found, both got fixed.