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Contents
require 'spec_helper'
require 'hamster/list'
describe Hamster::List do
[:filter, :select, :find_all].each do |method|
describe "##{method}" do
it "is lazy" do
lambda { Hamster.stream { fail }.filter { |item| false } }.should_not raise_error
end
[
[[], []],
[["A"], ["A"]],
[["A", "B", "C"], ["A", "B", "C"]],
[["A", "b", "C"], ["A", "C"]],
[["a", "b", "c"], []],
].each do |values, expected|
describe "on #{values.inspect}" do
before do
@original = Hamster.list(*values)
end
describe "with a block" do
before do
@result = @original.send(method) { |item| item == item.upcase }
end
it "preserves the original" do
@original.should == Hamster.list(*values)
end
it "returns #{expected.inspect}" do
@result.should == Hamster.list(*expected)
end
end
describe "without a block" do
it "returns self" do
@original.send(method).should equal(@original)
end
end
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems