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ruby--ruby/spec/rubyspec/shared/enumerator/rewind.rb
eregon 95e8c48dd3 Add in-tree mspec and ruby/spec
* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-05-07 12:04:49 +00:00

39 lines
767 B
Ruby

require File.expand_path('../../../spec_helper', __FILE__)
describe :enum_rewind, shared: true do
before :each do
@enum = 1.upto(3)
end
it "resets the enumerator to its initial state" do
@enum.next.should == 1
@enum.next.should == 2
@enum.rewind
@enum.next.should == 1
end
it "returns self" do
@enum.rewind.should == @enum
end
it "has no effect on a new enumerator" do
@enum.rewind
@enum.next.should == 1
end
it "has no effect if called multiple, consecutive times" do
@enum.next.should == 1
@enum.rewind
@enum.rewind
@enum.next.should == 1
end
it "works with peek to reset the position" do
@enum.next
@enum.next
@enum.rewind
@enum.next
@enum.peek.should == 2
end
end