Implement hooks

[jowers]

Currently, as each scenario is a new tcl interpreter, we have been using inline tcl to perform setup tasks for our tests. However, as there is no order to the files being sourced, we have hit a few problems with dependencies (e.g. trying to call a proc before it has been initialised).

It would be good if we were able to have before/after hooks to allow us to perform the initialisation in the before hook, knowing that everything has been sourced by that point.

@mattwynne, would this require changes to cucumber to allow hooks to be passed through?

Note - we'd need to consider what scope things are being run in if looking at this.

[mattwynne]

Hi @jowers.

I think we can do this without any changes to Cucumber. Shall we start with a feature file as usual, where you can sketch out the tcl DSL for defining hooks, and we can work our way in from there?

[jowers]

Hi,

Sounds good. I'm actually going to have a go at issue #28 first as it should be a quick one that is causing a little bit of frustration at the moment, then I'll move onto this one.

[jowers]

Created pull request #33