33 lines
790 B
Ruby
33 lines
790 B
Ruby
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require 'spec_helper'
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describe FrameDiffList do
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let(:frame_diff_list) { described_class.new(frames) }
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let(:frames) { [[1.5, frame_1], [0.5, frame_2]] }
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let(:frame_1) { double('frame_1', :diff => diff_1) }
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let(:frame_2) { double('frame_2', :diff => diff_2) }
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let(:diff_1) { double('diff_1') }
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let(:diff_2) { double('diff_2') }
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describe '#each' do
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subject { frame_diff_list.to_a }
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it 'maps each frame to its diff' do
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expect(subject).to eq([[1.5, diff_1], [0.5, diff_2]])
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end
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it 'diffs the first frame with nil' do
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subject
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expect(frame_1).to have_received(:diff).with(nil)
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end
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it 'diffs the subsequent frames with the previous ones' do
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subject
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expect(frame_2).to have_received(:diff).with(frame_1)
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end
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end
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end
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