added test for sprite importer

test/units/sprites/importer_test.rb

@@ -0,0 +1,49 @@
+require 'test_helper'
+require 'timecop'
+class ImporterTest < Test::Unit::TestCase
+  URI = "selectors/*.png"
+
+  def setup
+    @images_src_path = File.join(File.dirname(__FILE__), '..', '..', 'fixtures', 'sprites', 'public', 'images')
+    file = StringIO.new("images_path = #{@images_src_path.inspect}\n")
+    Compass.add_configuration(file, "sprite_config")
+    @importer = Compass::SpriteImporter.new(:uri => URI, :options => options)
+  end
+
+  def options
+    {:foo => 'bar'}
+  end
+
+  test "load should return an instance of SpriteImporter" do
+    assert Compass::SpriteImporter.load(URI, options).is_a?(Compass::SpriteImporter)
+  end
+
+  test "name should return the sprite name" do
+    assert_equal 'selectors', @importer.name
+  end
+
+  test "path should return the sprite path" do
+    assert_equal 'selectors', @importer.path
+  end
+
+  test "should return all the sprite names" do
+    assert_equal ["ten-by-ten", "ten-by-ten_active", "ten-by-ten_hover", "ten-by-ten_target"], @importer.sprite_names
+  end
+
+  test "should have correct mtime" do
+    thirtydays = Time.now.to_i + (60*60*24*30)
+    file = Dir[File.join(@images_src_path, URI)].sort.first
+    File.utime(thirtydays, thirtydays, file)
+    assert_equal thirtydays, File.mtime(file).to_i
+    assert_equal thirtydays, @importer.mtime(URI, {}).to_i
+  end
+
+  test "should return sass engine on find" do
+    assert @importer.find(URI, {}).is_a?(Sass::Engine)
+  end
+
+  test "sass options should contain options" do
+    assert_equal 'bar', @importer.sass_options[:foo]
+  end
+
+end