Remove all nodes when calling Element#inner_text=

This fixes #64.

doc/changelog.md

@@ -3,6 +3,16 @@
 This document contains details of the various releases and their release dates.
 Dates are in the format `yyyy-mm-dd`.
 
+## 0.3.0 - Unreleased
+
+### Element Inner Text
+
+When setting the inner text of an element using `Oga::XML::Element#inner_text=`
+_all_ child nodes of the element are now removed first, instead of only text
+nodes being removed.
+
+See <https://github.com/YorickPeterse/oga/issues/64> for more information.
+
 ## 0.2.0 - 2014-11-17
 
 ### CSS Selector Support

lib/oga/xml/element.rb

@@ -212,11 +212,8 @@ module Oga
       # @param [String] text
       #
       def inner_text=(text)
-        children.each do |child|
-          child.remove if child.is_a?(Text)
-        end
-
-        children << XML::Text.new(:text => text)
+        text_node = XML::Text.new(:text => text)
+        @children = NodeSet.new([text_node])
       end
 
       ##

spec/oga/xml/element_spec.rb

@@ -260,11 +260,13 @@ describe Oga::XML::Element do
       @element.inner_text.should == 'foo'
     end
 
-    example 'remove existing text nodes before inserting new nodes' do
+    example 'remove all existing nodes before inserting a new text node' do
       @element.children << Oga::XML::Text.new(:text => 'foo')
+      @element.children << Oga::XML::Element.new(:name => 'x')
 
       @element.inner_text = 'bar'
-      @element.inner_text.should == 'bar'
+
+      @element.children.length.should == 1
     end
   end