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require 'spec_helper'
describe Immutable::Vector do
let(:vector) { V[[:a, 3], [:b, 2], [:c, 1]] }
describe '#assoc' do
it 'searches for a 2-element array with a given 1st item' do
vector.assoc(:b).should == [:b, 2]
end
it 'returns nil if a matching 1st item is not found' do
vector.assoc(:d).should be_nil
end
it 'uses #== to compare 1st items with provided object' do
vector.assoc(EqualNotEql.new).should_not be_nil
vector.assoc(EqlNotEqual.new).should be_nil
end
it 'skips elements which are not indexable' do
V[false, true, nil].assoc(:b).should be_nil
V[[1,2], nil].assoc(3).should be_nil
end
end
describe '#rassoc' do
it 'searches for a 2-element array with a given 2nd item' do
vector.rassoc(1).should == [:c, 1]
end
it 'returns nil if a matching 2nd item is not found' do
vector.rassoc(4).should be_nil
end
it 'uses #== to compare 2nd items with provided object' do
vector.rassoc(EqualNotEql.new).should_not be_nil
vector.rassoc(EqlNotEqual.new).should be_nil
end
it 'skips elements which are not indexable' do
V[false, true, nil].rassoc(:b).should be_nil
V[[1,2], nil].rassoc(3).should be_nil
end
end
end
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