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require "abstract_unit"
module ActionDispatch
module Journey
module NFA
class TestTransitionTable < ActiveSupport::TestCase
def setup
@parser = Journey::Parser.new
end
def test_eclosure
table = tt "/"
assert_equal [0], table.eclosure(0)
table = tt ":a|:b"
assert_equal 3, table.eclosure(0).length
table = tt "(:a|:b)"
assert_equal 5, table.eclosure(0).length
assert_equal 5, table.eclosure([0]).length
end
def test_following_states_one
table = tt "/"
assert_equal [1], table.following_states(0, "/")
assert_equal [1], table.following_states([0], "/")
end
def test_following_states_group
table = tt "a|b"
states = table.eclosure 0
assert_equal 1, table.following_states(states, "a").length
assert_equal 1, table.following_states(states, "b").length
end
def test_following_states_multi
table = tt "a|a"
states = table.eclosure 0
assert_equal 2, table.following_states(states, "a").length
assert_equal 0, table.following_states(states, "b").length
end
def test_following_states_regexp
table = tt "a|:a"
states = table.eclosure 0
assert_equal 1, table.following_states(states, "a").length
assert_equal 1, table.following_states(states, /[^\.\/\?]+/).length
assert_equal 0, table.following_states(states, "b").length
end
def test_alphabet
table = tt "a|:a"
assert_equal [/[^\.\/\?]+/, "a"], table.alphabet
table = tt "a|a"
assert_equal ["a"], table.alphabet
end
private
def tt(string)
ast = @parser.parse string
builder = Builder.new ast
builder.transition_table
end
end
end
end
end
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