wrong number of arguments

[sobrinho]

Hi there!

I'm seeing this error:

       wrong number of arguments (0 for 1) for SuperDiff::ObjectInspection::InspectionTreeBuilders::Main initializer
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/attr_extras-7.1.0/lib/attr_extras/attr_initialize.rb:55:in `validate_arity'
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/attr_extras-7.1.0/lib/attr_extras/attr_initialize.rb:26:in `call'
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/attr_extras-7.1.0/lib/attr_extras/attr_initialize.rb:26:in `block in apply'
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/attr_extras-7.1.0/lib/attr_extras/explicit.rb:73:in `new'
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/attr_extras-7.1.0/lib/attr_extras/explicit.rb:73:in `block (2 levels) in static_facade'
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/super_diff-0.9.0/lib/super_diff.rb:42:in `block in inspect_object'
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/super_diff-0.9.0/lib/super_diff/recursion_guard.rb:21:in `guarding_recursion_of'
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/super_diff-0.9.0/lib/super_diff.rb:41:in `inspect_object'
     # /Users/sobrinho/.gem/ruby/2.7.6/gems/super_diff-0.9.0/lib/super_diff/rspec/monkey_patches.rb:269:in `format'
     # /Users/sobrinho/.gem/ruby/2.7.6/bundler/gems/sidekiq-delay_extensions-bbe5faeaed8b/lib/sidekiq/delay_extensions/class_methods.rb:23:in `perform'

The backtrace after that goes in other gems, let me know if you need it.

[mcmire]

Hi @sobrinho. Can you give me an example of the test you're trying to write? That would help me understand what caused this.

[sobrinho]

There's nothing too specific there, it's a simple expect(something).to receive(:blah).with(1) and then something.blah(2) which causes the assertion failure to happen.

A lot of different specs with different assertions are failing.

Not sure if it's related to Ruby 2.7.6, I'm trying to isolate it.

[jas14]

Hey @sobrinho , thanks for the report! First, a note that since Ruby 2.7 has reached end of life, we don't support it any more. But this may be applicable to the latest version anyway.

I did rewind to Ruby 2.7.6, SuperDiff 0.9.0, and fast-forwarded to attr_extras v7.1.0, and was still unable to reproduce this with RSpec 3.9.0 or 3.10.0. Here's my repro file:

require 'super_diff/rspec'

RSpec.describe do
  it do
    something = Struct.new(:blah).new
    expect(something).to receive(:blah).with(1)
    something.blah(2)
  end
end

and here's the output I got:

Failures:

  1) is expected to receive blah(1) 1 time
     Failure/Error: something.blah(2)

       #<struct blah=nil> received :blah with unexpected arguments
         expected: (1)
              got: (2)

Let me know if you're able to reproduce this again. I wonder if the object you're stubbing has some interesting behavior that would make it difficult to inspect, so a full backtrace with the other gems would be good too.

[jas14]

Another note: possibly related to #140 – stack trace looks very similar.