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Contents
require 'test_helper'
module Vedeu
module Editor
describe Item do
let(:described) { Vedeu::Editor::Item }
let(:instance) { described.new(collection, index) }
let(:collection) {}
let(:index) {}
describe '#initialize' do
it { instance.must_be_instance_of(described) }
it { instance.instance_variable_get('@collection').must_equal(collection) }
it { instance.instance_variable_get('@index').must_equal(index) }
end
describe '.by_index' do
subject { described.by_index(collection, index) }
context 'when the collection is empty or nil' do
it { subject.must_equal(nil) }
end
context 'when the collection is not empty' do
let(:collection) { [:hydrogen, :helium, :lithium] }
context 'when the index is nil' do
it 'returns the last item' do
subject.must_equal(:lithium)
end
end
context 'when the index is greater than the size of the collection' do
let(:index) { 4 }
it 'returns the last item' do
subject.must_equal(:lithium)
end
end
context 'when the index < 0' do
let(:index) { -2 }
it { subject.must_equal(:hydrogen) }
end
context 'when the index == 0' do
let(:index) { 0 }
it { subject.must_equal(:hydrogen) }
end
context 'when the index > 0 and the index is less than the size of ' \
'the collection' do
let(:index) { 1 }
it { subject.must_equal(:helium) }
end
end
end
describe '#by_index' do
it { instance.must_respond_to(:by_index) }
end
end # Item
end # Editor
end # Vedeu
Version data entries
28 entries across 28 versions & 1 rubygems