Exclude specs that need terminal binary compiled when it's missing

spec/models/terminal_spec.rb

@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe Terminal do
+describe Terminal, needs_terminal_bin: true do
 
   let(:terminal) { Terminal.new(6, 3) }
   let(:first_line_text) { subject.as_json.first.map(&:first).join.strip }

spec/services/asciicast_frames_file_updater_spec.rb

@@ -5,7 +5,7 @@ describe AsciicastFramesFileUpdater do
   let(:updater) { described_class.new(file_writer) }
   let(:file_writer) { double('file_writer') }
 
-  describe '#update' do
+  describe '#update', needs_terminal_bin: true do
     let(:asciicast) { create(:asciicast) }
     let(:film) { double('film', :frames => frames) }
     let(:frames) { [1, 2] }

spec/spec_helper.rb

@@ -25,6 +25,7 @@ RSpec.configure do |config|
   config.filter_run :focus
   config.run_all_when_everything_filtered = true
   config.filter_run_excluding :unstable if ENV['RSPEC_EXCLUDE_UNSTABLE']
+  config.filter_run_excluding :needs_terminal_bin unless File.executable?("src/terminal")
 
   # Many RSpec users commonly either run the entire suite or an individual
   # file, and it's useful to allow more verbose output when running an