require "spec_helper"

describe ChunkyPNG::Image do
  describe "#metadata" do
    it "should load metadata from an existing file" do
      image = ChunkyPNG::Image.from_file(resource_file("text_chunk.png"))
      expect(image.metadata["Title"]).to  eql "My amazing icon!"
      expect(image.metadata["Author"]).to eql "Willem van Bergen"
    end

    it "should write metadata to the file correctly" do
      filename = resource_file("_metadata.png")

      image = ChunkyPNG::Image.new(10, 10)
      image.metadata["Title"]  = "My amazing icon!"
      image.metadata["Author"] = "Willem van Bergen"
      image.save(filename)

      metadata = ChunkyPNG::Datastream.from_file(filename).metadata
      expect(metadata["Title"]).to  eql "My amazing icon!"
      expect(metadata["Author"]).to eql "Willem van Bergen"
    end

    it "should load empty images correctly" do
      expect { ChunkyPNG::Image.from_file(resource_file("empty.png")) }.to_not raise_error
    end
  end
end