at_least_n_times.spec.rb

require 'rspec'

describe 'at_least(n).times' do
  # Pass
  it 'RSpec 2.9.0+ allows at_least(N).times when N > 0' do
    mymock = mock
    mymock.should_receive(:run).at_least(1).times
    mymock.run
    mymock.run
  end

  # Fail
  it 'RSpec 2.9.0+ does *not* allow at_least(N).times when N = 0' do
    mymock = mock
    mymock.should_receive(:run).at_least(0).times
    mymock.run
  end

  # Pass
  it 'RSpec 2.10.0 allows at_least(N).times when N = 0 if .and_return is added' do
    mymock = mock
    mymock.should_receive(:run).at_least(0).times.and_return(true)
    mymock.run.should be_true
  end
end

output.2.09.0.txt

Desktop$ gem install rspec -v 2.9.0
Fetching: rspec-core-2.9.0.gem (100%)
Fetching: rspec-expectations-2.9.1.gem (100%)
Fetching: rspec-mocks-2.9.0.gem (100%)
Fetching: rspec-2.9.0.gem (100%)
Successfully installed rspec-core-2.9.0
Successfully installed rspec-expectations-2.9.1
Successfully installed rspec-mocks-2.9.0
Successfully installed rspec-2.9.0
4 gems installed
Desktop$ rspec -v
2.9.0
Desktop$ rspec at_least_n_times.spec.rb 
.FF

Failures:

  1) at_least(n).times RSpec 2.9.0+ does *not* allow at_least(N).times when N = 0
     Failure/Error: mymock.run
       (Mock).run(no args)
           expected: 0 times
           received: 1 time
     # ./at_least_n_times.spec.rb:16:in `block (2 levels) in <top (required)>'

  2) at_least(n).times RSpec 2.9.0+ allows at_least(N).times when N = 0 if .and_return is added
     Failure/Error: mymock.run.should be_true
       (Mock).run(no args)
           expected: 0 times
           received: 1 time
     # ./at_least_n_times.spec.rb:23:in `block (2 levels) in <top (required)>'

Finished in 0.00131 seconds
3 examples, 2 failures

Failed examples:

rspec ./at_least_n_times.spec.rb:13 # at_least(n).times RSpec 2.9.0+ does *not* allow at_least(N).times when N = 0
rspec ./at_least_n_times.spec.rb:20 # at_least(n).times RSpec 2.9.0+ allows at_least(N).times when N = 0 if .and_return is added

output.2.10.0.txt

Desktop$ gem install rspec
Fetching: rspec-core-2.10.0.gem (100%)
Fetching: rspec-expectations-2.10.0.gem (100%)
Fetching: rspec-mocks-2.10.0.gem (100%)
Fetching: rspec-2.10.0.gem (100%)
Successfully installed rspec-core-2.10.0
Successfully installed rspec-expectations-2.10.0
Successfully installed rspec-mocks-2.10.0
Successfully installed rspec-2.10.0
4 gems installed
Desktop$ rspec -v
2.10.0
Desktop$ rspec at_least_n_times.spec.rb 
.F.

Failures:

  1) at_least(n).times RSpec 2.9.0+ does *not* allow at_least(N).times when N = 0
     Failure/Error: mymock.run
       (Mock).run(no args)
           expected: 0 times
           received: 1 time
     # ./at_least_n_times.spec.rb:16:in `block (2 levels) in <top (required)>'

Finished in 0.00352 seconds
3 examples, 1 failure

Failed examples:

rspec ./at_least_n_times.spec.rb:13 # at_least(n).times RSpec 2.9.0+ does *not* allow at_least(N).times when N = 0