Cast values to integers

app/services/riiif/size/height.rb

@@ -6,7 +6,7 @@ module Size
     class Height < Resize
       def initialize(info, height)
         @image_info = info
-        @height = height
+        @height = height.to_i
       end
 
       # @return [String] a resize directive for imagemagick to use

app/services/riiif/size/width.rb

@@ -6,7 +6,7 @@ module Size
     class Width < Resize
       def initialize(info, width)
         @image_info = info
-        @width = width
+        @width = width.to_i
       end
 
       # @return [String] a resize directive for imagemagick to use

spec/services/riiif/size/height_spec.rb

@@ -0,0 +1,13 @@
+require 'spec_helper'
+
+RSpec.describe Riiif::Size::Height do
+  let(:image_info) { double }
+
+  context 'when initialized with strings' do
+    let(:instance) { described_class.new(image_info, '50') }
+
+    it 'casts height to an integer' do
+      expect(instance.height).to eq 50
+    end
+  end
+end

spec/services/riiif/size/width_spec.rb

@@ -0,0 +1,13 @@
+require 'spec_helper'
+
+RSpec.describe Riiif::Size::Width do
+  let(:image_info) { double }
+
+  context 'when initialized with strings' do
+    let(:instance) { described_class.new(image_info, '50') }
+
+    it 'casts height to an integer' do
+      expect(instance.width).to eq 50
+    end
+  end
+end