notahat/tango — pull request #8 by ileitch (2012-02-14 19:03:04+00:00)
Title: Implement met! which ensures the condition is NOT met before meet is called

Not 100% sure on the name `met!`, could possibly just name the thing `must_not_meet`?

Use case:

```
class Server < Tango::Runner
def initialize(server_name)
@server_name = server_name
@cloud_api = SomeCloudApi.new
end

step :build do
met! { @cloud_api.has_server?(server_name) }
meet { @cloud_api.build_server(...) }
end
end
```