尝试运行 rspec，但它无法读取测试文件

Question

require 'rails_helper'

RSpec.describe User, type: :model do
  before { @user = FactoryGirl.build(:user) }

  it { expect(@user).to respond_to(:email) }
end

The error:

/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:29: warning: constant Gem::ConfigMap is deprecated
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:30: warning: constant Gem::ConfigMap is deprecated
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated
WARN: Unresolved or ambiguous specs during Gem::Specification.reset:
      diff-lcs (< 2.0, >= 1.2.0)
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated
      Available/installed versions of this gem:
      - 1.5.0
      - 1.3
WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'
Please report a bug if this causes problems.
/usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:10: warning: constant Gem::ConfigMap is deprecated
/var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/formatters.rb:212:in `require': cannot load such file -- rspec/core/formatters/progress_formatter (LoadError)
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/formatters.rb:212:in `built_in_formatter'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/formatters.rb:182:in `find_formatter'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/formatters.rb:152:in `add'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/formatters.rb:127:in `setup_default'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/reporter.rb:47:in `block in prepare_default'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/reporter.rb:236:in `ensure_listeners_ready'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/reporter.rb:207:in `notify'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/reporter.rb:100:in `message'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/world.rb:196:in `report_filter_message'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/world.rb:188:in `announce_filters'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/runner.rb:104:in `ensure in setup'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/runner.rb:104:in `setup'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/runner.rb:86:in `run'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/runner.rb:71:in `run'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/lib/rspec/core/runner.rb:45:in `invoke'
        from /var/lib/gems/2.3.0/gems/rspec-core-3.9.3/exe/rspec:4:in `<top (required)>'
        from /usr/local/bin/rspec:23:in `load'
        from /usr/local/bin/rspec:23:in `<main>'

Answer 1

First, we need to remove the unnecessary gem. Try running bundle clean --force.

This command will remove all unused gems in your bundler directory. This is useful when you have made many changes to your gem dependencies.

You can check more information about that comment in this link .

Now runs

bundle install

and try to rerun your tests. It seems that those two steps have helped other people:

https://github.com/rubygems/rubygems/issues/1945#issuecomment-334979982