- Fixed thumbnail float imprecision errors. (jdelStrother)

[git-p4: depot-paths = "//src/image_science/dev/": change = 7421]

lib/image_science.rb

@@ -60,7 +60,7 @@ def thumbnail(size) # :yields: image
     w, h = width, height
     scale = size.to_f / (w > h ? w : h)
 
-    self.resize((w * scale).to_i, (h * scale).to_i) do |image|
+    self.resize((w * scale).round, (h * scale).round) do |image|
       yield image
     end
   end

test/test_image_science.rb

@@ -157,4 +157,21 @@ def test_resize_negative
 
     refute File.exists?(@tmppath)
   end
+
+  def test_thumbnail
+    ImageScience.with_image @path do |img|
+      img.thumbnail(29) do |thumb|
+        assert thumb.save(@tmppath)
+      end
+    end
+
+    assert File.exists?(@tmppath)
+
+    ImageScience.with_image @tmppath do |img|
+      assert_kind_of ImageScience, img
+      assert_equal 29, img.height
+      assert_equal 29, img.width
+    end
+  end
+
 end