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require "spec_helper"
require "hamster/sorted_set"
describe Hamster::SortedSet do
describe "#between" do
context "when called without a block" do
it "returns a sorted set of all items from the first argument to the second" do
100.times do
items = rand(100).times.collect { rand(1000) }
set = SS.new(items)
from,to = [rand(1000),rand(1000)].sort
result = set.between(from, to)
array = items.select { |x| x >= from && x <= to }.sort
result.class.should be(Hamster::SortedSet)
result.size.should == array.size
result.to_a.should == array
end
end
end
context "when called with a block" do
it "yields all the items lower than the argument" do
100.times do
items = rand(100).times.collect { rand(1000) }
set = SS.new(items)
from,to = [rand(1000),rand(1000)].sort
result = []
set.between(from, to) { |x| result << x }
array = items.select { |x| x >= from && x <= to }.sort
result.size.should == array.size
result.should == array
end
end
end
context "on an empty set" do
it "returns an empty set" do
SS.empty.between(1, 2).should be_empty
SS.empty.between('abc', 'def').should be_empty
SS.empty.between(:symbol, :another).should be_empty
end
end
context "with a 'to' argument lower than the 'from' argument" do
it "returns an empty set" do
result = SS.new(1..100).between(6, 5)
result.class.should be(Hamster::SortedSet)
result.should be_empty
end
end
end
end
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