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Versions: 17
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Contents
# -*- coding: utf-8 -*-
require File.join(File.dirname(__FILE__), "..", "..", "spec_helper")
describe "Tree Node Visitors" do
before do
ta = TreeNode.new( "a", nil )
LeafNode.new("1", ta )
LeafNode.new("2", ta )
tb = TreeNode.new( "b", ta )
LeafNode.new( "3", tb )
@tree = ta
end
it CallbackTreeNodeVisitor2 do
visitor = CallbackTreeNodeVisitor2.new
visitor.on_enter_node{ |tree_node, new_parent_node|
# puts "**** #{tree_node}"
TreeNode.new("n" + tree_node.content, new_parent_node)
}
visitor.on_visit_leaf{ |leaf_node, new_parent_node|
# puts "**** #{leaf_node}"
LeafNode.new( "n" + leaf_node.content, new_parent_node )
}
@tree.accept( visitor )
new_root = visitor.root
new_root.content.should == "n" + @tree.content
accumulator = []
visitor = BlockTreeNodeVisitor.new { |node| accumulator << node.content}
new_root.accept( visitor )
accumulator.length.should == 5
accumulator.should == %w{ na n1 n2 nb n3 }
end
end
Version data entries
17 entries across 17 versions & 2 rubygems