Provide block syntax for sequences

[floehopper]

It should be possible to provide the following syntax for a simple sequence i.e. one that is not interleaved with another :-

in_sequence(:task_order) do
  task_one.should_receive(:execute)
  task_two.should_receive(:execute)
end

Any expectations within the block would be assigned to the sequence specified in the block.

See https://gist.github.com/1704783 for some relation discussions.

[viking]

Any update with this? I've taken to writing a little helper in my tests so that I can use <<:

class SequenceHelper
  def initialize(name)
    @seq = sequence(name)
  end

  def <<(expectation)
    expectation.in_sequence(@seq)
  end
end

[viking]

I noticed the sequence experiment branch. I came up with almost the same implementation independently for sequence blocks.

Some other ideas:

1. use set_trace_func (or TracePoint) to add constraints to expectations
2. change execution context of block so that current_sequence has a different value (Mock#current_sequence could always return nil)
3. change execute context of block so that local variables are actually wrappers that add constraints to expectations

For option 3, a trick is needed. As far as I can tell, any local variables in the block binding supersede everything else, so we'd have to get the source of the block (using Proc#source_location) and eval the code to make a new block, and then use method_missing to wrap the objects.

Any thoughts?

[floehopper]

Released in v2.2.0