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Diffstat (limited to 'spec/ruby/core/enumerable/zip_spec.rb')
-rw-r--r-- | spec/ruby/core/enumerable/zip_spec.rb | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/zip_spec.rb b/spec/ruby/core/enumerable/zip_spec.rb new file mode 100644 index 0000000000..2d090f335c --- /dev/null +++ b/spec/ruby/core/enumerable/zip_spec.rb @@ -0,0 +1,42 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Enumerable#zip" do + + it "combines each element of the receiver with the element of the same index in arrays given as arguments" do + EnumerableSpecs::Numerous.new(1,2,3).zip([4,5,6],[7,8,9]).should == [[1,4,7],[2,5,8],[3,6,9]] + EnumerableSpecs::Numerous.new(1,2,3).zip.should == [[1],[2],[3]] + end + + it "passes each element of the result array to a block and return nil if a block is given" do + expected = [[1,4,7],[2,5,8],[3,6,9]] + EnumerableSpecs::Numerous.new(1,2,3).zip([4,5,6],[7,8,9]) do |result_component| + result_component.should == expected.shift + end.should == nil + expected.size.should == 0 + end + + it "fills resulting array with nils if an argument array is too short" do + EnumerableSpecs::Numerous.new(1,2,3).zip([4,5,6], [7,8]).should == [[1,4,7],[2,5,8],[3,6,nil]] + end + + it "converts arguments to arrays using #to_ary" do + convertable = EnumerableSpecs::ArrayConvertable.new(4,5,6) + EnumerableSpecs::Numerous.new(1,2,3).zip(convertable).should == [[1,4],[2,5],[3,6]] + convertable.called.should == :to_ary + end + + it "converts arguments to enums using #to_enum" do + convertable = EnumerableSpecs::EnumConvertable.new(4..6) + EnumerableSpecs::Numerous.new(1,2,3).zip(convertable).should == [[1,4],[2,5],[3,6]] + convertable.called.should == :to_enum + convertable.sym.should == :each + end + + it "gathers whole arrays as elements when each yields multiple" do + multi = EnumerableSpecs::YieldsMulti.new + multi.zip(multi).should == [[[1, 2], [1, 2]], [[3, 4, 5], [3, 4, 5]], [[6, 7, 8, 9], [6, 7, 8, 9]]] + end + +end + |