require 'helper'

class TestRegenerator < Test::Unit::TestCase
  context "The site regenerator" do
    setup do
      FileUtils.rm_rf(source_dir(".jekyll-metadata"))

      @site = fixture_site({
        "collections" => {
          "methods" => {
            "output" => true
          }
        }
      })

      @site.read
      @page = @site.pages.first
      @post = @site.posts.first
      @document = @site.docs_to_write.first
      @asset_file = @site.pages.find(&:asset_file?)
      @regenerator = @site.regenerator
    end

    should "regenerate documents and assets if changed or not in metadata" do
      assert @regenerator.regenerate?(@page)
      assert @regenerator.regenerate?(@post)
      assert @regenerator.regenerate?(@document)
      assert @regenerator.regenerate?(@asset_file)
    end

    should "not regenerate if not changed" do
      # Process files
      @regenerator.regenerate?(@page)
      @regenerator.regenerate?(@post)
      @regenerator.regenerate?(@document)
      @regenerator.regenerate?(@asset_file)

      @regenerator.write
      @regenerator = Regenerator.new(@site)

      assert !@regenerator.regenerate?(@page)
      assert !@regenerator.regenerate?(@post)
      assert !@regenerator.regenerate?(@document)
    end

    should "always regenerate asset files" do
      assert @regenerator.regenerate?(@asset_file)
    end

    should "always regenerate objects that don't respond to :path" do
      assert @regenerator.regenerate?(Object.new)
    end
  end

  context "The site metadata" do
    setup do
      FileUtils.rm_rf(source_dir(".jekyll-metadata"))

      @site = Site.new(Jekyll.configuration({
        "source" => source_dir,
        "destination" => dest_dir
      }))

      @site.process
      @path = @site.in_source_dir(@site.pages.first.path)
      @regenerator = @site.regenerator
    end

    should "store modification times" do
      assert_equal File.mtime(@path), @regenerator.metadata[@path]["mtime"]
    end

    should "cache processed entries" do
      assert @regenerator.cache[@path]
    end

    should "write to the metadata file" do
      @regenerator.clear
      @regenerator.add(@path)
      @regenerator.write
      assert File.file?(source_dir(".jekyll-metadata"))
    end

    should "read from the metadata file" do
      @regenerator = Regenerator.new(@site)
      assert_equal File.mtime(@path), @regenerator.metadata[@path]["mtime"]
    end

    # Methods

    should "be able to add a path to the metadata" do
      @regenerator.clear
      @regenerator.add(@path)
      assert_equal File.mtime(@path), @regenerator.metadata[@path]["mtime"]
      assert_equal [], @regenerator.metadata[@path]["deps"]
      assert @regenerator.cache[@path]
    end

    should "return true on nonexistent path" do
      @regenerator.clear
      assert @regenerator.add("/bogus/path.md")
      assert @regenerator.modified?("/bogus/path.md")
    end

    should "be able to force a path to regenerate" do
      @regenerator.clear
      @regenerator.force(@path)
      assert @regenerator.cache[@path]
      assert @regenerator.modified?(@path)
    end

    should "be able to clear metadata and cache" do
      @regenerator.clear
      @regenerator.add(@path)
      assert_equal 1, @regenerator.metadata.length
      assert_equal 1, @regenerator.cache.length
      @regenerator.clear
      assert_equal 0, @regenerator.metadata.length
      assert_equal 0, @regenerator.cache.length
    end

    should "not regenerate a path if it is not modified" do
      @regenerator.clear
      @regenerator.add(@path)
      @regenerator.write
      @regenerator = Regenerator.new(@site)

      assert !@regenerator.modified?(@path)
    end

    should "not regenerate if path in cache is false" do
      @regenerator.clear
      @regenerator.add(@path)
      @regenerator.write
      @regenerator = Regenerator.new(@site)

      assert !@regenerator.modified?(@path)
      assert !@regenerator.cache[@path]
      assert !@regenerator.modified?(@path)
    end

    should "regenerate if path in not in metadata" do
      @regenerator.clear
      @regenerator.add(@path)

      assert @regenerator.modified?(@path)
    end

    should "regenerate if path in cache is true" do
      @regenerator.clear
      @regenerator.add(@path)

      assert @regenerator.modified?(@path)
      assert @regenerator.cache[@path]
      assert @regenerator.modified?(@path)
    end

    should "regenerate if file is modified" do
      @regenerator.clear
      @regenerator.add(@path)
      @regenerator.metadata[@path]["mtime"] = Time.at(0)
      @regenerator.write
      @regenerator = Regenerator.new(@site)

      assert_not_same File.mtime(@path), @regenerator.metadata[@path]["mtime"]
      assert @regenerator.modified?(@path)
    end

    should "regenerate if dependency is modified" do
      @regenerator.clear
      @regenerator.add(@path)
      @regenerator.write
      @regenerator = Regenerator.new(@site)

      @regenerator.add_dependency(@path, "new.dependency")
      assert_equal ["new.dependency"], @regenerator.metadata[@path]["deps"]
      assert @regenerator.modified?("new.dependency")
      assert @regenerator.modified?(@path)
    end

    should "regenerate everything if metadata is disabled" do
      @site.config["full_rebuild"] = true
      @regenerator.clear
      @regenerator.add(@path)
      @regenerator.write
      @regenerator = Regenerator.new(@site)

      assert @regenerator.modified?(@path)
    end
  end
end