require 'spec_helper'

describe LinkThumbnailer do

  let(:og_example) { File.open(File.dirname(__FILE__) + '/examples/og_example.html').read() }

  it { should respond_to :configuration }
  it { should respond_to :configure }
  it { should respond_to :config }
  it { should respond_to :generate }

  describe "configuration" do

    context "#configure" do

      it "should yields self" do
        LinkThumbnailer.should_receive(:configure).and_yield(LinkThumbnailer)
        LinkThumbnailer.configure {|config|}
      end

      before do
        LinkThumbnailer.configure {|config|
          config.mandatory_attributes = %w(foo bar)
          config.strict = false
          config.redirect_limit = 5
          config.blacklist_urls = []
          config.limit = 5
          config.top = 10
        }
      end

      after do
        LinkThumbnailer.configuration = nil
      end

      specify { LinkThumbnailer.configuration.mandatory_attributes.should eq(%w(foo bar)) }
      specify { LinkThumbnailer.configuration.strict.should be_false }
      specify { LinkThumbnailer.configuration.redirect_limit.should eq(5) }
      specify { LinkThumbnailer.configuration.blacklist_urls.should eq([]) }
      specify { LinkThumbnailer.configuration.limit.should eq(5) }
      specify { LinkThumbnailer.configuration.top.should eq(10) }

    end

  end

  context "default values" do

    before do
      LinkThumbnailer.configure {|config| }
    end

    specify { LinkThumbnailer.configuration.mandatory_attributes.should eq(%w(url title images)) }
    specify { LinkThumbnailer.configuration.strict.should be_true }
    specify { LinkThumbnailer.configuration.redirect_limit.should eq(3) }
    specify { LinkThumbnailer.configuration.blacklist_urls.should eq([
      %r{^http://ad\.doubleclick\.net/},
      %r{^http://b\.scorecardresearch\.com/},
      %r{^http://pixel\.quantserve\.com/},
      %r{^http://s7\.addthis\.com/}
    ]) }
    specify { LinkThumbnailer.configuration.limit.should eq(10) }
    specify { LinkThumbnailer.configuration.top.should eq(5) }

  end

  context ".generate" do

    context "with valid arguments" do

      context "and options" do

        it "should set top option" do
          expect { LinkThumbnailer.generate('foo', :top => 20).to change(LinkThumbnailer.configuration.top).from(5).to(20) }
        end

        it "should set limit option" do
          expect { LinkThumbnailer.generate('foo', :limit => 20).to change(LinkThumbnailer.configuration.top).from(10).to(20) }
        end

      end

      context "when strict" do

        context "and not valid" do

          subject { LinkThumbnailer.generate('foo') }

          it { should be_nil }

        end

        context "and valid" do

          before do
            stub_request(:get, "http://zerply.com/").to_return(:status => 200, :body => og_example, :headers => {})
          end

          subject { LinkThumbnailer.generate('http://zerply.com') }

          it { should_not be_nil }
          it { subject.valid?.should be_true }

        end

      end

      context "when not strict" do

        before do
          LinkThumbnailer.configure {|config| config.strict = false}
        end

        context "and not valid" do

          subject { LinkThumbnailer.generate('foo') }

          it { should_not be_nil }
          it { subject.valid?.should be_true }

        end

        context "and valid" do

          before do
            stub_request(:get, "http://zerply.com/").to_return(:status => 200, :body => og_example, :headers => {})
          end

          subject { LinkThumbnailer.generate('http://zerply.com') }

          it { should_not be_nil }
          it { subject.valid?.should be_true }

        end

      end

    end

  end

end