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* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
53 lines
1.9 KiB
Ruby
53 lines
1.9 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require File.expand_path('../fixtures/classes', __FILE__)
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describe "Array#transpose" do
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it "assumes an array of arrays and returns the result of transposing rows and columns" do
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[[1, 'a'], [2, 'b'], [3, 'c']].transpose.should == [[1, 2, 3], ["a", "b", "c"]]
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[[1, 2, 3], ["a", "b", "c"]].transpose.should == [[1, 'a'], [2, 'b'], [3, 'c']]
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[].transpose.should == []
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[[]].transpose.should == []
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[[], []].transpose.should == []
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[[0]].transpose.should == [[0]]
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[[0], [1]].transpose.should == [[0, 1]]
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end
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it "tries to convert the passed argument to an Array using #to_ary" do
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obj = mock('[1,2]')
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obj.should_receive(:to_ary).and_return([1, 2])
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[obj, [:a, :b]].transpose.should == [[1, :a], [2, :b]]
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end
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it "properly handles recursive arrays" do
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empty = ArraySpecs.empty_recursive_array
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empty.transpose.should == empty
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a = []; a << a
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b = []; b << b
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[a, b].transpose.should == [[a, b]]
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a = [1]; a << a
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b = [2]; b << b
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[a, b].transpose.should == [ [1, 2], [a, b] ]
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end
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it "raises a TypeError if the passed Argument does not respond to #to_ary" do
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lambda { [Object.new, [:a, :b]].transpose }.should raise_error(TypeError)
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end
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it "does not call to_ary on array subclass elements" do
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ary = [ArraySpecs::ToAryArray[1, 2], ArraySpecs::ToAryArray[4, 6]]
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ary.transpose.should == [[1, 4], [2, 6]]
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end
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it "raises an IndexError if the arrays are not of the same length" do
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lambda { [[1, 2], [:a]].transpose }.should raise_error(IndexError)
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end
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it "does not return subclass instance on Array subclasses" do
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result = ArraySpecs::MyArray[ArraySpecs::MyArray[1, 2, 3], ArraySpecs::MyArray[4, 5, 6]].transpose
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result.should be_an_instance_of(Array)
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result[0].should be_an_instance_of(Array)
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result[1].should be_an_instance_of(Array)
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end
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end
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