Re: [rspec] undefined method `detect' for nil:NilClass (NoMethodError) in `find_failed_line'

Phil Pirozhkov Sat, 05 Sep 2020 00:51:05 -0700

Hi Jack

Sorry for brevity, will reply in more detail later when I get to my computer.

One thing I could spot is a typo in "receve" in one of the examples.

There might be something wrong with the other examples, but I understand that you're looking for a generic solution how to quickly get what's wrong in a failure message, and clearly "undefined method" raised somewhere in RSpec's internals is nowhere near being helpful.

I guess ‎we'll have to dig whats in base_formatter.rb:209, that may give an idea of what is the root cause of missing exact failure messages. I'll check it out, but if you have a chance to take a look yourself earlier than I'll get to it, don't hesitate. RSpec is just as good as any other code, probably even easier to read and understand.

- Phil

From: Jack Royal-Gordon

Sent: Saturday, 5 September 2020 07:48

To: rspec@googlegroups.com

Reply To: rspec@googlegroups.com

Subject: [rspec] undefined method `detect' for nil:NilClass (NoMethodError) in `find_failed_line'

Running RSpec 2.99 (I know, I know, but I’m working on bringing my project up to date), and one section of one of my spec files gives that error. I’m not necessarily looking for a fix as much as a strategy for troubleshooting. Each of the three examples by itself will cause the same problem (both by isolating them on the command line and by commenting out the code). I also tried eliminating the “before” block (and FWIW, the call being tested works fine in production, not that that really means anything).

The section in question looks like:

require 'spec_helper'

describe UserDistributor do
…
describe '#scrape_sales_data' do
let(:ud) { FactoryGirl.create :user_distributor, :nook }

before do
allow_any_instance_of(DistributorWorker).to receive(:scrape_sales_data_for_user).and_return(true)
end

subject { ud.scrape_sales_data }

it 'sets the user scrape_status field' do
expect { subject }.to change { ud.user.scrape_status }
end

it 'creates a distributor worker' do
expect(ud.distributor).to receve(:worker)
subject
end

it 'calls #scrape_sales_data_for_user on the distibutor worker with the UD' do
expect_any_instance_of(DistributorWorker).to receive(:scrape_sales_data_for_user).with(ud)
subject
end
end
end

I get the following output (using —format documentation and —backtrace):

UserDistributor
  #scrape_sales_data
  sets the user scrape_status field (FAILED - 1)
  creates a distributor worker (FAILED - 2)
  calls #scrape_sales_data_for_user on the distibutor worker with the UD (FAILED - 3)

Failures:

  1) UserDistributor#scrape_sales_data sets the user scrape_status field
/Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/formatters/base_formatter.rb:209:in `find_failed_line': undefined method `detect' for nil:NilClass (NoMethodError)
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/formatters/base_formatter.rb:191:in `read_failed_line'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/formatters/base_text_formatter.rb:300:in `dump_failure_info'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/formatters/base_text_formatter.rb:294:in `dump_failure'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/formatters/base_text_formatter.rb:24:in `block in dump_failures'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/formatters/base_text_formatter.rb:22:in `each'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/formatters/base_text_formatter.rb:22:in `each_with_index'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/formatters/base_text_formatter.rb:22:in `dump_failures'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/reporter.rb:130:in `block in notify'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/reporter.rb:129:in `each'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/reporter.rb:129:in `notify'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/reporter.rb:109:in `finish'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/reporter.rb:60:in `report'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/command_line.rb:21:in `run'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/runner.rb:103:in `run'
from /Users/jackrg/.rbenv/versions/2.0.0-p576/lib/ruby/gems/2.0.0/gems/rspec-core-2.99.2/lib/rspec/core/runner.rb:17:in `block in autorun'

--
You received this message because you are subscribed to the Google Groups "rspec" group.
To unsubscribe from this group and stop receiving emails from it, send an email to rspec+unsubscr...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/rspec/B695317A-868B-4DF9-829B-62D84B6C1AB5%40pobox.com.

Re: [rspec] undefined method `detect' for nil:NilClass (NoMethodError) in `find_failed_line'

Reply via email to