How to initialize a custom matcher in rspec 3

[Kris Leech]

I'm writing a custom matcher to allow testing of the exit status of code.

I've written the matcher as an object using the bits of information I could find.

I'm using `config.include(Rspec::ExitMatchers)` to include a module which has one method which creates an instance of my matcher, however this method receives the expected value, not the block passed to `expect`, so how do I create an instance of my matcher since the initializer needs the block (actual), not the expected value which should be passed to `matches?`...

https://github.com/krisleech/rspec-exit_matchers/blob/master/lib/rspec/exit_matchers.rb#L38

https://github.com/krisleech/rspec-exit_matchers/blob/master/spec/rspec/exit_matchers_spec.rb#L3

Any helps/pointers would be great. Thanks, Kris.

[Myron Marston]

I've put a gist together showing you how to do this:

https://gist.github.com/myronmarston/6b8116224e7ec0b00650

The key is that your `exit_with_status` method receives a `status` argument, not a block, and forwards that on to your class's `initialize`.  `matches?` is then passed the `expect` block.

HTH,

Myron 

[Kris Leech]

Myron - thanks very much. I didn't think my post actually posted, hence my delay.