108 lines
3.0 KiB
Ruby
108 lines
3.0 KiB
Ruby
require 'spec_helper'
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describe Snapshot do
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describe '.build' do
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let(:snapshot) { Snapshot.build(input) }
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let(:input) { [input_line_1, input_line_2] }
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let(:input_line_1) { double('input_line_1') }
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let(:input_line_2) { double('input_line_2') }
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let(:line_1) { double('line_1') }
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let(:line_2) { double('line_2') }
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before do
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allow(SnapshotLine).to receive(:build).with(input_line_1) { line_1 }
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allow(SnapshotLine).to receive(:build).with(input_line_2) { line_2 }
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end
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it 'returns an instance of Snapshot' do
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expect(snapshot).to be_kind_of(Snapshot)
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end
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it 'includes lines built by SnapshotLine.build' do
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expect(snapshot.to_a[0]).to be(line_1)
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expect(snapshot.to_a[1]).to be(line_2)
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end
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end
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describe '#each' do
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let(:snapshot) { Snapshot.new([:line_1, :line_2]) }
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it 'yields to the given block for each line' do
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lines = []
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snapshot.each do |line|
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lines << line
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end
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expect(lines).to eq([:line_1, :line_2])
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end
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end
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describe '#==' do
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let(:snapshot) { Snapshot.new([:foo]) }
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subject { snapshot == other }
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context "when the other has the same lines" do
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let(:other) { Snapshot.new([:foo]) }
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it { should be(true) }
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end
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context "when the other has a different lines" do
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let(:other) { Snapshot.new([:foo, :bar]) }
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it { should be(false) }
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end
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end
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describe '#crop' do
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let(:snapshot) { Snapshot.new(lines) }
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let(:lines) { [line_1, line_2, line_3] }
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let(:line_1) { double('line_1', :crop => cropped_line_1) }
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let(:line_2) { double('line_2', :crop => cropped_line_2) }
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let(:line_3) { double('line_3', :crop => cropped_line_3) }
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let(:cropped_line_1) { double('cropped_line_1') }
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let(:cropped_line_2) { double('cropped_line_2') }
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let(:cropped_line_3) { double('cropped_line_3') }
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let(:width) { 3 }
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subject { snapshot.crop(width, height) }
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context "when height is lower than lines count" do
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let(:height) { 2 }
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it 'crops the last "height" lines' do
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subject
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expect(line_1).to_not have_received(:crop)
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expect(line_2).to have_received(:crop).with(3)
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expect(line_3).to have_received(:crop).with(3)
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end
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it 'returns a new Snapshot with last 2 lines cropped' do
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expect(subject).to eq(Snapshot.new([cropped_line_2, cropped_line_3]))
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end
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end
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context "when height is equal to lines count" do
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let(:height) { 3 }
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it 'returns a new Snapshot with all lines cropped' do
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expect(subject).to eq(Snapshot.new([cropped_line_1, cropped_line_2,
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cropped_line_3]))
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end
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end
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context "when height is greater than lines count" do
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let(:height) { 4 }
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it 'returns a new Snapshot with all lines cropped and missing lines added' do
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expect(subject).to eq(Snapshot.new([cropped_line_1, cropped_line_2,
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cropped_line_3, []]))
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end
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end
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end
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end
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