Contents

require 'spec_helper'

describe ChunkyPNG::Datastream do

  describe '.from_io'do
    it "should raise an error when loading a file with a bad signature" do
      filename = resource_file('damaged_signature.png')
      expect { ChunkyPNG::Datastream.from_file(filename) }.to raise_error(ChunkyPNG::SignatureMismatch)
    end

    it "should raise an error if the CRC of a chunk is incorrect" do
      filename = resource_file('damaged_chunk.png')
      expect { ChunkyPNG::Datastream.from_file(filename) }.to raise_error(ChunkyPNG::CRCMismatch)
    end

    it "should raise an error for a stream that is too short" do
      stream = StringIO.new
      expect { ChunkyPNG::Datastream.from_io(stream) }.to raise_error(ChunkyPNG::SignatureMismatch)
    end

    it "should read a stream with trailing data without failing" do
      filename = resource_file('trailing_bytes_after_iend_chunk.png')
      image = ChunkyPNG::Datastream.from_file(filename)
      expect(image).to be_instance_of(ChunkyPNG::Datastream)
    end
  end

  describe '#metadata' do
    it "should load uncompressed tXTt chunks correctly" do
      filename = resource_file('text_chunk.png')
      ds = ChunkyPNG::Datastream.from_file(filename)
      expect(ds.metadata['Title']).to  eql 'My amazing icon!'
      expect(ds.metadata['Author']).to eql "Willem van Bergen"
    end

    it "should load compressed zTXt chunks correctly" do
      filename = resource_file('ztxt_chunk.png')
      ds = ChunkyPNG::Datastream.from_file(filename)
      expect(ds.metadata['Title']).to eql 'PngSuite'
      expect(ds.metadata['Copyright']).to eql "Copyright Willem van Schaik, Singapore 1995-96"
    end
  end
end

Version data entries

4 entries across 4 versions & 3 rubygems

Version	Path
arcabouco-0.2.13	vendor/bundle/gems/chunky_png-1.3.6/spec/chunky_png/datastream_spec.rb
second_step-0.1.2	secondstep-notify-1.0.0-osx/lib/ruby/lib/ruby/gems/2.2.0/gems/chunky_png-1.3.7/spec/chunky_png/datastream_spec.rb
chunky_png-1.3.7	spec/chunky_png/datastream_spec.rb
chunky_png-1.3.6	spec/chunky_png/datastream_spec.rb