testing for the tiled images

spec/zoomifier_spec.rb

@@ -6,14 +6,42 @@ describe Zoomifier do
     Zoomifier.should respond_to(:zoomify)
   end
 
-  describe "1024x768.jpg" do
-    it "should zoomify" do
-      output = File.dirname(__FILE__) + '/data/1024x768/'
-      FileUtils.rm_rf(output)
-      input = File.dirname(__FILE__) + '/data/1024x768.jpg'
-      Zoomifier::zoomify(input)
-      File.directory?(output).should be_true
-      FileUtils.rm_rf(output)
+  describe "On a 1024x768 JPEG file" do
+    before(:all) do
+      @input = File.dirname(__FILE__) + '/data/1024x768.jpg'
+      @output = File.dirname(__FILE__) + '/data/1024x768/'
+      @tiles = %w[0-0-0.jpg 1-1-1.jpg 2-1-0.jpg 2-2-1.jpg 2-3-2.jpg
+                  1-0-0.jpg 2-0-0.jpg 2-1-1.jpg 2-2-2.jpg
+                  1-0-1.jpg 2-0-1.jpg 2-1-2.jpg 2-3-0.jpg
+                  1-1-0.jpg 2-0-2.jpg 2-2-0.jpg 2-3-1.jpg]
+      FileUtils.rm_rf(@output)
+      Zoomifier::zoomify(@input)
+    end
+
+    after(:all) do
+      FileUtils.rm_rf(@output)
+    end
+
+    it "should create the output directory" do
+      File.directory?(@output).should be_true
+    end
+
+    it "should create the image properties file" do
+      File.file?(@output + '/ImageProperties.xml').should be_true
+    end
+
+    it "should create a tile group directory" do
+      File.directory?(@output + '/TileGroup0/').should be_true
+    end
+
+    it "should create the tiled images" do
+      tile_images = Dir.entries(@output + '/TileGroup0/').reject {|f| f.match(/^\./)}
+      tile_images.sort.should == @tiles.sort
+      tile_images.each do |file|
+        image = Magick::Image.read(@output + '/TileGroup0/' + file).first
+        image.rows.should <= 256
+        image.columns.should <= 256
+      end
     end
   end
 end