CODEWITHSUNDEEP
rspecrspec2rspec-rails
Alex808
Alex808

Reputation: 116

Rspec generate "it do" from array

How generate it test from array

describe "some test" do
  let(:some) { generated_array }

  # raise error - undefined local variable or method
  some.each do |key|
    it "#{key} test" do
      true
    end
  end

  # will work
  [1,2,3].each do |key|
   ...

end

How it can be realyzed with RSpec?

Upvotes: 1

Views: 398

Answers (1)

Aaron K
Aaron K

Reputation: 6971

You can't have your test using the let in the outer context that way due to RSpec being a DSL. RSpec reads the example spec files first, before running the tests. It hits the some.each during DSL parsing before any of the actual tests are run.

This errors because some gets defined on the example object, but the describe and context run in the an example group object context.

You can see this with:

describe 'thing' do
  p self.ancestors
  #=> [#<Class:0x007fa97a0761f8>, RSpec::Core::ExampleGroup, RSpec::Matchers,
  #    RSpec::Core::MockFrameworkAdapter, RSpec::Core::SharedExampleGroup,
  #    RSpec::Core::Pending, RSpec::Core::Extensions::InstanceEvalWithArgs,
  #    RSpec::Core::ExampleGroup::LetDefinitions,
  #    RSpec::Core::ExampleGroup::NamedSubjectPreventSuper,
  #    RSpec::Core::MemoizedHelpers, Object, PP::ObjectMixin, Kernel,
  #    BasicObject]

  it { p selfs }
  #=> #<RSpec::Core::ExampleGroup::Nested_1:0x007f8d1b397790 ...>
end

Upvotes: 1

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