require 'spec_helper'

describe IconGenerator do
    let (:tmp) { Dir.tmpdir }

    it "requires the source file to exist" do
        fake_file = -> { IconGenerator::Builder.new('missing.png', tmp) }
        raised_error = fake_file.must_raise IconGenerator::Error
        raised_error.to_s.must_match '1st argument must be an existing file'
    end

    it "requires the source file to have a supported extension" do
        html = -> { IconGenerator::Builder.new('index.html', tmp) }
        raised_error = html.must_raise IconGenerator::Error
        raised_error.to_s.must_match '1st argument must be a valid image'
    end

    it "requires the output directory to exist" do
        tempfile = Tempfile.new ['test', '.png']
        %x[convert -size 1x1 canvas:khaki #{tempfile.path}]
        missing = -> { IconGenerator::Builder.new(tempfile.path, 'missing') }
        raised_error = missing.must_raise IconGenerator::Error
        raised_error.to_s.must_match '2nd argument must be an existing directory'
    end

    it "creates a favicon when requested" do
        tempfile = Tempfile.new ['test', '.png']
        %x[convert -size 1x1 canvas:khaki #{tempfile.path}]
        builder = IconGenerator::Builder.new(tempfile.path, tmp)
        stdout = capture_io { builder.build(:favicon) }.to_s
        File.exists?("#{tmp}/favicon.ico").must_be :==, true
        stdout.must_include "Built #{tmp}/favicon.ico"
    end

    it "creates apple-touch-icons when requested" do
        tempfile = Tempfile.new ['test', '.png']
        %x[convert -size 1x1 canvas:khaki #{tempfile.path}]
        builder = IconGenerator::Builder.new(tempfile.path, tmp)
        stdout = capture_io { builder.build(:touch) }.to_s

        files = [
            "#{tmp}/apple-touch-icon-precomposed.png",
            "#{tmp}/apple-touch-icon-152x152-precomposed.png",
            "#{tmp}/apple-touch-icon-144x144-precomposed.png",
            "#{tmp}/apple-touch-icon-120x120-precomposed.png",
            "#{tmp}/apple-touch-icon-114x114-precomposed.png",
            "#{tmp}/apple-touch-icon-72x72-precomposed.png",
            "#{tmp}/apple-touch-icon-57x57-precomposed.png",
        ]

        files.each do |file|
            File.exists?(file).must_be :==, true
            stdout.must_include "Built #{file}"
        end
    end

    it "works with jpgs as a source file" do
        tempfile = Tempfile.new ['test', '.jpg']
        %x[convert -size 1x1 canvas:khaki #{tempfile.path}]
        builder = IconGenerator::Builder.new(tempfile.path, tmp)
        stdout_favicon = capture_io { builder.build(:favicon) }.to_s
        stdout_favicon.must_include "Built #{tmp}/favicon.ico"
        stdout_touch = capture_io { builder.build(:touch) }.to_s
        stdout_touch.must_include "Built #{tmp}/apple-touch-icon-precomposed.png"
    end

    it "works with gifs as a source file" do
        tempfile = Tempfile.new ['test', '.gif']
        %x[convert -size 1x1 canvas:khaki #{tempfile.path}]
        builder = IconGenerator::Builder.new(tempfile.path, tmp)
        stdout_favicon = capture_io { builder.build(:favicon) }.to_s
        stdout_favicon.must_include "Built #{tmp}/favicon.ico"
        stdout_touch = capture_io { builder.build(:touch) }.to_s
        stdout_touch.must_include "Built #{tmp}/apple-touch-icon-precomposed.png"
    end
end