Contents

require 'spec_helper'

describe 'IOUtils' do
  let(:io) { File.open(fixtures_dir + '/test.jpg', 'rb') }
  include FormatParser::IOUtils

  describe '#safe_read' do
    it 'raises if the requested bytes are past the EOF' do
      io.seek(268118) # Seek to the actual end of the file
      expect {
        safe_read(io, 10)
      }.to raise_error(FormatParser::IOUtils::InvalidRead)
    end

    it 'raises if we ask for more bytes than are available' do
      expect {
        safe_read(io, 1_000_000)
      }.to raise_error(FormatParser::IOUtils::InvalidRead)
    end
  end

  describe '#safe_skip' do
    it 'raises on a negative skip byte amount' do
      fake_io = double
      expect {
        safe_skip(fake_io, -5)
      }.to raise_error(FormatParser::IOUtils::InvalidRead)
    end

    it 'uses #pos if available on the object' do
      fake_io = double(pos: 11)
      expect(fake_io).to receive(:seek).with(11 + 5)
      safe_skip(fake_io, 5)
    end

    it 'uses #read if no #pos is available on the object' do
      fake_io = double
      expect(fake_io).to receive(:read).with(5).and_return('x' * 5)
      safe_skip(fake_io, 5)
    end
  end
end

Version data entries

12 entries across 12 versions & 1 rubygems

Version	Path
format_parser-0.7.0	spec/io_utils_spec.rb
format_parser-0.6.0	spec/io_utils_spec.rb
format_parser-0.5.2	spec/io_utils_spec.rb
format_parser-0.5.1	spec/io_utils_spec.rb
format_parser-0.5.0	spec/io_utils_spec.rb
format_parser-0.4.0	spec/io_utils_spec.rb
format_parser-0.3.5	spec/io_utils_spec.rb
format_parser-0.3.4	spec/io_utils_spec.rb
format_parser-0.3.3	spec/io_utils_spec.rb
format_parser-0.3.2	spec/io_utils_spec.rb
format_parser-0.3.1	spec/io_utils_spec.rb
format_parser-0.3.0	spec/io_utils_spec.rb