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Diffstat (limited to 'spec/ruby/core/array/each_index_spec.rb')
-rw-r--r-- | spec/ruby/core/array/each_index_spec.rb | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/spec/ruby/core/array/each_index_spec.rb b/spec/ruby/core/array/each_index_spec.rb new file mode 100644 index 0000000000..8872c00f8c --- /dev/null +++ b/spec/ruby/core/array/each_index_spec.rb @@ -0,0 +1,42 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) +require File.expand_path('../shared/enumeratorize', __FILE__) +require File.expand_path('../../enumerable/shared/enumeratorized', __FILE__) + +# Modifying a collection while the contents are being iterated +# gives undefined behavior. See +# http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/23633 + +describe "Array#each_index" do + before :each do + ScratchPad.record [] + end + + it "passes the index of each element to the block" do + a = ['a', 'b', 'c', 'd'] + a.each_index { |i| ScratchPad << i } + ScratchPad.recorded.should == [0, 1, 2, 3] + end + + it "returns self" do + a = [:a, :b, :c] + a.each_index { |i| }.should equal(a) + end + + it "is not confused by removing elements from the front" do + a = [1, 2, 3] + + a.shift + ScratchPad.record [] + a.each_index { |i| ScratchPad << i } + ScratchPad.recorded.should == [0, 1] + + a.shift + ScratchPad.record [] + a.each_index { |i| ScratchPad << i } + ScratchPad.recorded.should == [0] + end + + it_behaves_like :enumeratorize, :each_index + it_behaves_like :enumeratorized_with_origin_size, :each_index, [1,2,3] +end |