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Contents
require File.expand_path('../../../spec_helper', __FILE__)
require 'hamster/list'
describe Hamster::List do
describe "#one?" do
describe "on a really big list" do
before do
@list = Hamster.interval(0, STACK_OVERFLOW_DEPTH)
end
it "doesn't run out of stack" do
lambda { @list.one? { false } }.should_not raise_error
end
end
describe "when empty" do
before do
@list = Hamster.list
end
it "with a block returns false" do
@list.one? {}.should == false
end
it "with no block returns false" do
@list.one?.should == false
end
end
describe "when not empty" do
describe "with a block" do
before do
@list = Hamster.list("A", "B", "C")
end
it "returns false if the block returns true more than once" do
@list.one? { |item| true }.should == false
end
it "returns false if the block never returns true" do
@list.one? { |item| false }.should == false
end
it "returns true if the block only returns true once" do
@list.one? { |item| item == "A" }.should == true
end
end
describe "with no block" do
it "returns false if more than one value is truthy" do
Hamster.list(nil, true, "A").one?.should == false
end
it "returns true if only one value is truthy" do
Hamster.list(nil, true, false).one?.should == true
end
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems