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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Array#rassoc" do
it "returns the first contained array whose second element is == object" do
ary = [[1, "a", 0.5], [2, "b"], [3, "b"], [4, "c"], [], [5], [6, "d"]]
ary.rassoc("a").should == [1, "a", 0.5]
ary.rassoc("b").should == [2, "b"]
ary.rassoc("d").should == [6, "d"]
ary.rassoc("z").should == nil
end
it "properly handles recursive arrays" do
empty = ArraySpecs.empty_recursive_array
empty.rassoc([]).should be_nil
[[empty, empty]].rassoc(empty).should == [empty, empty]
array = ArraySpecs.recursive_array
array.rassoc(array).should be_nil
[[empty, array]].rassoc(array).should == [empty, array]
end
it "calls elem == obj on the second element of each contained array" do
key = 'foobar'
o = mock('foobar')
def o.==(other); other == 'foobar'; end
[[1, :foobar], [2, o], [3, mock('foo')]].rassoc(key).should == [2, o]
end
it "does not check the last element in each contained but speficically the second" do
key = 'foobar'
o = mock('foobar')
def o.==(other); other == 'foobar'; end
[[1, :foobar, o], [2, o, 1], [3, mock('foo')]].rassoc(key).should == [2, o, 1]
end
end
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