Manuel Bustillo
ebc7586670
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Run unit tests / unit_tests (pull_request) Successful in 2m16s
84 lines
2.5 KiB
Ruby
84 lines
2.5 KiB
Ruby
require 'rails_helper'
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module Tables
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RSpec.describe Swap do
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describe '#each' do
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let(:swaps) do
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acc = []
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described_class.new(initial_solution).each do |solution|
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acc << solution.tables.map(&:dup)
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end
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acc
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end
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context 'when there are two tables with two people each' do
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let(:initial_solution) do
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Distribution.new(min_per_table: 2, max_per_table: 2).tap do |distribution|
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distribution.tables << %i[a b]
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distribution.tables << %i[c d]
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end
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end
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it 'yields all possible swaps between the tables' do
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expect(swaps).to contain_exactly(
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[%i[a d], %i[c b]],
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[%i[b c], %i[d a]],
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[%i[a c], %i[d b]],
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[%i[b d], %i[c a]]
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)
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end
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end
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context 'when there are two tables with three people each' do
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let(:initial_solution) do
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Distribution.new(min_per_table: 3, max_per_table: 3).tap do |distribution|
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distribution.tables << %i[a b c]
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distribution.tables << %i[d e f]
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end
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end
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it 'yields all possible swaps between the tables' do
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expect(swaps).to contain_exactly(
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[%i[b c d], %i[e f a]],
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[%i[b c e], %i[f d a]],
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[%i[b c f], %i[d e a]],
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[%i[c a d], %i[e f b]],
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[%i[c a e], %i[f d b]],
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[%i[c a f], %i[d e b]],
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[%i[a b d], %i[e f c]],
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[%i[a b e], %i[f d c]],
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[%i[a b f], %i[d e c]]
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)
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end
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end
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context 'when there are three tables with two people each' do
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let(:initial_solution) do
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Distribution.new(min_per_table: 2, max_per_table: 2).tap do |distribution|
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distribution.tables << %i[a b]
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distribution.tables << %i[c d]
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distribution.tables << %i[e f]
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end
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end
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it 'yields all possible swaps between the tables' do
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expect(swaps).to contain_exactly(
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[%i[b c], %i[d a], %i[e f]],
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[%i[b d], %i[c a], %i[e f]],
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[%i[a c], %i[d b], %i[e f]],
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[%i[a d], %i[c b], %i[e f]],
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[%i[b e], %i[c d], %i[f a]],
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[%i[b f], %i[c d], %i[e a]],
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[%i[a e], %i[c d], %i[f b]],
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[%i[a f], %i[c d], %i[e b]],
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[%i[a b], %i[d e], %i[f c]],
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[%i[a b], %i[d f], %i[e c]],
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[%i[a b], %i[c e], %i[f d]],
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[%i[a b], %i[c f], %i[e d]]
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)
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end
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end
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end
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end
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end
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