Merging in calavera's pagination branch

test/test_pager.rb

@@ -0,0 +1,47 @@
+require File.dirname(__FILE__) + '/helper'
+
+class TestPager < Test::Unit::TestCase
+  
+  def setup
+    stub(Jekyll).configuration do
+      Jekyll::DEFAULTS.merge({'source' => source_dir, 'destination' => dest_dir,
+        'paginate' => 2})
+    end
+
+    @config = Jekyll.configuration
+    @site = Site.new(@config)
+    @posts = @site.read_posts('')
+  end
+  
+  def teardown
+    @config = Jekyll.configuration('paginate' => nil)
+  end
+  
+  def test_calculate_pages
+    assert_equal(2, Pager.calculate_pages(@posts, @config['paginate']))
+  end
+
+  def test_create_first_pager
+    pager = Pager.new(@config, 1, @posts)
+    assert_equal(@config['paginate'].to_i, pager.posts.size)
+    assert_equal(2, pager.total_pages)
+    assert_nil(pager.previous_page)
+    assert_equal(2, pager.next_page)
+  end
+  
+  def test_create_second_pager
+    pager = Pager.new(@config, 2, @posts)
+    assert_equal(@posts.size - @config['paginate'].to_i, pager.posts.size)
+    assert_equal(2, pager.total_pages)
+    assert_equal(1, pager.previous_page)
+    assert_nil(pager.next_page)
+  end
+  
+  def test_create_third_pager
+    assert_raise(RuntimeError) { Pager.new(@config, 3, @posts) }
+  end
+  
+  def test_pagination_enabled_with_command_option
+    assert_equal(true, Pager.pagination_enabled?(@config, 'index.html'))
+  end
+end