Fix the height/width of the editor in spec

Now that everything is absolutely position, the editor no longer assumes
a "natural" height and width. This can be addressed later if we want to
allow editors to expand based on their content.

spec/editor-component-spec.coffee

@@ -41,6 +41,10 @@ describe "EditorComponent", ->
       verticalScrollbarNode = node.querySelector('.vertical-scrollbar')
       horizontalScrollbarNode = node.querySelector('.horizontal-scrollbar')
 
+      node.style.height = editor.getLineCount() * lineHeightInPixels + 'px'
+      node.style.width = '1000px'
+      component.measureHeightAndWidth()
+
   afterEach ->
     contentNode.style.width = ''