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require "spec_helper"
require "hamster/list"
describe Hamster::List do
describe "#compact" do
it "is lazy" do
-> { Hamster.stream { fail }.compact }.should_not raise_error
end
[
[[], []],
[["A"], ["A"]],
[%w[A B C], %w[A B C]],
[[nil], []],
[[nil, "B"], ["B"]],
[["A", nil], ["A"]],
[[nil, nil], []],
[["A", nil, "C"], %w[A C]],
[[nil, "B", nil], ["B"]],
].each do |values, expected|
context "on #{values.inspect}" do
let(:list) { L[*values] }
it "preserves the original" do
list.compact
list.should eql(L[*values])
end
it "returns #{expected.inspect}" do
list.compact.should eql(L[*expected])
end
end
end
end
end
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