jekyll/test/test_excerpt.rb

require 'helper'

class TestExcerpt < JekyllUnitTest
  def setup_post(file)
    Post.new(@site, source_dir, '', file)
  end

  def do_render(post)
    layouts = { "default" => Layout.new(@site, source_dir('_layouts'), "simple.html")}
    post.render(layouts, {"site" => {"posts" => []}})
  end

  context "With extraction disabled" do
    setup do
      clear_dest
      @site = Site.new(site_configuration('excerpt_separator' => ''))
      @post = setup_post("2013-07-22-post-excerpt-with-layout.markdown")
    end

    should "not be generated" do
      excerpt = @post.send(:extract_excerpt)
      assert_equal true, excerpt.empty?
    end
  end

  context "An extracted excerpt" do
    setup do
      clear_dest
      @site = Site.new(site_configuration)
      @post = setup_post("2013-07-22-post-excerpt-with-layout.markdown")
      @excerpt = @post.send :extract_excerpt
    end

    context "#include(string)" do

      setup do
        @excerpt.output = "Here is a fake output stub"
      end

      should "return true only if an excerpt output contains a specified string" do
        assert @excerpt.include?("fake output")
        refute @excerpt.include?("real output")
      end
    end

    context "#id" do
      should "contain the UID for the post" do
        assert_equal @excerpt.id, "#{@post.id}/#excerpt"
      end
      should "return a string" do
        assert_same @post.id.class, String
      end
    end

    context "#to_s" do
      should "return its content if no output present" do
        assert_equal @excerpt.content, @excerpt.to_s
      end

      should "return its output if output present" do
        @excerpt.output = "Fake Output"
        assert_equal @excerpt.output, @excerpt.to_s
      end
    end

    context "#inspect" do
      should "contain the excerpt id as a shorthand string identifier" do
        assert_equal @excerpt.inspect, "<Excerpt: #{@excerpt.id}>"
      end

      should "return a string" do
        assert_same @post.id.class, String
      end
    end

    context "#to_liquid" do
      should "contain the proper page data to mimick the post liquid" do
        assert_equal "Post Excerpt with Layout", @excerpt.to_liquid["title"]
        assert_equal "/bar/baz/z_category/mixedcase/2013/07/22/post-excerpt-with-layout.html", @excerpt.to_liquid["url"]
        assert_equal Time.parse("2013-07-22"), @excerpt.to_liquid["date"]
        assert_equal %w[bar baz z_category MixedCase], @excerpt.to_liquid["categories"]
        assert_equal %w[first second third jekyllrb.com], @excerpt.to_liquid["tags"]
        assert_equal "_posts/2013-07-22-post-excerpt-with-layout.markdown", @excerpt.to_liquid["path"]
      end

      should "consider inheritance" do
        klass = Class.new(Jekyll::Post)
        assert_gets_called = false
        klass.send(:define_method, :assert_gets_called) { assert_gets_called = true }
        klass.const_set(:EXCERPT_ATTRIBUTES_FOR_LIQUID, Jekyll::Post::EXCERPT_ATTRIBUTES_FOR_LIQUID + ['assert_gets_called'])
        post = klass.new(@site, source_dir, '', "2008-02-02-published.markdown")
        Jekyll::Excerpt.new(post).to_liquid

        assert assert_gets_called, 'assert_gets_called did not get called on post.'
      end
    end

    context "#content" do

      context "before render" do
        should "be the first paragraph of the page" do
          assert_equal "First paragraph with [link ref][link].\n\n[link]: http://www.jekyllrb.com/", @excerpt.content
        end

        should "contain any refs at the bottom of the page" do
          assert @excerpt.content.include?("[link]: http://www.jekyllrb.com/")
        end
      end

      context "after render" do
        setup do
          @rendered_post = @post.dup
          do_render(@rendered_post)
          @extracted_excerpt = @rendered_post.send :extracted_excerpt
        end

        should "be the first paragraph of the page" do
          assert_equal "<p>First paragraph with <a href=\"http://www.jekyllrb.com/\">link ref</a>.</p>\n\n", @extracted_excerpt.content
        end

        should "link properly" do
          assert @extracted_excerpt.content.include?("http://www.jekyllrb.com/")
        end
      end
    end
  end

  context "A whole-post excerpt" do
    setup do
      clear_dest
      @site = Site.new(site_configuration)
      @post = setup_post("2008-02-02-published.markdown")
      @excerpt = @post.send :extract_excerpt
    end

    should "be generated" do
      assert_equal true, @excerpt.is_a?(Jekyll::Excerpt)
    end

    context "#content" do
      should "match the post content" do
        assert_equal @post.content, @excerpt.content
      end
    end
  end
end