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require File.expand_path('../helper', __FILE__)
class ChoiceTest < Test::Unit::TestCase
def test_terminal?
rule = Choice.new
assert_equal(false, rule.terminal?)
end
def test_exec
a = Rule.for('a')
b = Rule.for('b')
rule = Choice.new([ a, b ])
events = rule.exec(Input.new(''))
assert_equal([], events)
events = rule.exec(Input.new('a'))
assert(events)
assert_equal([rule, a, CLOSE, 1, CLOSE, 1], events)
events = rule.exec(Input.new('b'))
assert(events)
assert_equal([rule, b, CLOSE, 1, CLOSE, 1], events)
end
def test_to_s
rule = Choice.new(%w<a b>)
assert_equal('"a" | "b"', rule.to_s)
end
def test_to_embedded_s
rule1 = Choice.new(%w<a b>)
rule2 = Choice.new(%w<c d>)
rule = Choice.new([rule1, rule2])
assert_equal('("a" | "b") | ("c" | "d")', rule.to_s)
end
def test_to_s_with_label
rule = Choice.new(%w<a b>)
rule.label = 'a_label'
assert_equal('a_label:("a" | "b")', rule.to_s)
end
end
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