pupeno/assert_difference

Like Rails' assert_difference, but more powerful.

assert_difference's Issues

Implement assert_no_difference

Just that, same as Rails, for people not using Rails.

Return the return value of the block

Instead of returning a dictionary of expressions, return whatever the block returns so it's possible to do:

    email = assert_difference "ActionMailer::Base.deliveries.count" => +1 do
      Mailer.thank_you(user).deliver
    end

error when include AsserDifference in rspec

RSpec.configure do |config|
...
config.include AssertDifference
end

error : spec_helper.rb:43:in `block (2 levels) in <top (required)>': uninitialized constant AssertDifference (NameError)
Is this error only happen to me ? :D

Write tests

Go to 100% code coverage. And stay there.

Don't silently ignore expressions

Currently if you do something like

assert_difference "Exp1", "Exp2" do
  foo
end

Exp2 is ignored because it's taken as the error message. Instead one should write

assert_difference ["Exp1", "Exp2"] do
  foo
end

but there's no error pushing one to write it the correct way. Fix the API so this thing cannot happen.