require 'spec_helper' describe Grid do let(:grid) { described_class.new(data) } let(:data) { [ %w[a b c ć], %w[de ff], %w[ghiî], %w[j k l m] ] } describe '#width' do let(:data) { [ %w[a bc def] ] } subject { grid.width } it { should eq(6) } end describe '#height' do subject { grid.height } it { should eq(4) } end describe '#crop' do let(:expected) { described_class.new([%w[e f], %w[hi], %w[k l]]).lines } it 'crops the lines properly' do expect(grid.crop(1, 1, 2, 3).lines).to eq(expected) end end describe '#diff' do let(:line_a) { [:a, :b, :c] } let(:line_b) { [:d, :e, :f] } let(:line_c) { [:g, :h, :i] } let(:grid) { described_class.new([line_a, line_b, line_c]) } let(:line_d) { [:A, :b, :c] } let(:line_e) { [:g, :H, :i] } let(:other) { described_class.new([line_d, line_b, line_e]) } subject { grid.diff(other) } it 'returns only the lines that have changed from the other grid' do should eq({ 0 => line_a, 2 => line_c }) end context "when other is nil" do let(:other) { nil } it 'returns all the lines' do should eq({ 0 => line_a, 1 => line_b, 2 => line_c }) end end end describe '#as_json' do subject { grid.as_json } it { should eq([%w[a b c ć], %w[de ff], %w[ghiî], %w[j k l m]]) } end end