asciinema.org/spec/services/asciicast_snapshot_updater_spec.rb

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require 'spec_helper'
describe AsciicastSnapshotUpdater do
let(:updater) { described_class.new }
describe '#update' do
let(:asciicast) { double('asciicast', :duration => 5.0, :stdout => stdout,
:update_attribute => nil) }
let(:stdout) { double('stdout') }
let(:terminal) { double('terminal') }
let(:film) { double('film', :snapshot_at => 'foo') }
subject { updater.update(asciicast) }
before do
allow(asciicast).to receive(:with_terminal).and_yield(terminal)
allow(Film).to receive(:new).with(stdout, terminal) { film }
subject
end
it "generates the snapshot at half of asciicast's duration" do
expect(film).to have_received(:snapshot_at).with(2.5)
end
it "updates asciicast's snapshot to the terminal's snapshot" do
expect(asciicast).to have_received(:update_attribute).
with(:snapshot, 'foo')
end
context "when snapshot time given" do
subject { updater.update(asciicast, 4.3) }
it "generates the snapshot at the given time" do
expect(film).to have_received(:snapshot_at).with(4.3)
end
end
end
end