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#!/usr/bin/env ruby
require 'nlp_ruby'
require 'test/unit'
class TestHG < Test::Unit::TestCase
def test_viterbi
semiring = ViterbiSemiring.new
hypergraph, nodes_by_label, nodes_by_index = HG::read_hypergraph_from_json('test/hg/hg.json', semiring, true)
HG::viterbi hypergraph, nodes_by_label['root'], semiring
assert_equal('Goal', nodes_by_index.last.cat)
assert_equal(228.95, Math.log(nodes_by_index.last.score).round(2))
# do all operations in log space
semiring = ViterbiLogSemiring.new
hypergraph, nodes_by_label, nodes_by_index = HG::read_hypergraph_from_json('test/hg/hg.json', semiring)
HG::viterbi hypergraph, nodes_by_label['root'], semiring
assert_equal('Goal', nodes_by_index.last.cat)
assert_equal(228.95, nodes_by_index.last.score.round(2))
assert_equal hypergraph.nodes.size, 221
assert_equal hypergraph.edges.size, 16640
end
end
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