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#given a graph, output each level of friends.
#each friend should only be output once, at the first level they are encountered.
=begin
INPUT
2 # number of lines to follow
A:B,C,D # member a has friends b,c,d
A # the member to start the traversal from.
OUTPUT
=end
require 'social_graph'
describe "problem" do
subject { SocialGraph.new(input, output) }
let(:output) { StringIO.new }
context "when 2 lines given" do
let(:fixtures_dir) { File.join(Dir.pwd, 'spec', 'fixtures') }
let(:input) { StringIO.new(IO.read(File.join(fixtures_dir, "input001.txt"))) }
let(:expected) { IO.read(File.join(fixtures_dir, "output001.txt")) }
it 'writes the correct result' do
subject.run
output.rewind
expect(output.read).to eql(expected)
end
end
context "when 4 lines given" do
let(:fixtures_dir) { File.join(Dir.pwd, 'spec', 'fixtures') }
let(:input) { StringIO.new(IO.read(File.join(fixtures_dir, "input002.txt"))) }
let(:expected) { IO.read(File.join(fixtures_dir, "output002.txt")) }
it 'writes the correct result' do
subject.run
output.rewind
expect(output.read).to eql(expected)
end
end
context "when 7 lines given" do
let(:fixtures_dir) { File.join(Dir.pwd, 'spec', 'fixtures') }
let(:input) { StringIO.new(IO.read(File.join(fixtures_dir, "input000.txt"))) }
let(:expected) { IO.read(File.join(fixtures_dir, "output000.txt")) }
it 'writes the correct result' do
subject.run
output.rewind
expect(output.read).to eql(expected)
end
end
end
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