jini.rb in jini-0.0.5

- old
+ new

@@ -21,15 +21,17 @@
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
 # It's a simple XPATH builder.
+# ```
 # require 'jini'
-# xpath = Jini.new('body')
+# xpath = Jini.new('parent')
 #   .add_path(node: 'child')
-#   .add_path(node: 'child')
-#   .to_s // /body/child/child
+#   .add_path(node: 'toy')
+#   .to_s // body/child/toy
+# ```
 class Jini
   # When path not valid
   class InvalidPath < StandardError; end
 
   # @param head [String]
@@ -85,18 +87,19 @@
   # Access by index.
   # Addition '[index]' to xpath
   # @param position [Integer] number
   # @return [Jini] object
   def at(position)
+    raise InvalidPath, 'Cant use at after selection' if @head.include? '::'
     Jini.new("#{@head}[#{position}]")
   end
 
   # Replace all '/' to '::' symbols
   # if path doesn't contain invalid symbols for selection
   # @return [Jini] selection
   def selection
-    if @head.include?('[') || @head.include?(']') || @head.include?('@')
+    if @head.include?('[') || @head.include?(']') || @head.include?('@') || @head.include?('//')
       raise InvalidPath, 'Cannot select, path contains bad symbols'
     end
     Jini.new(@head.gsub('/', '::').to_s)
   end
 
@@ -120,7 +123,14 @@
         .gsub(
           /(\[@?#{name}="[^"]+"(\[\]+|\]))/,
           ''
         )
     )
+  end
+
+  # Adds '|' to head
+  # @param [String] node
+  # @return [Jini] with '|node' on tail
+  def or(node)
+    Jini.new("#{@head}|#{node}")
   end
 end