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require File.expand_path('../helper', __FILE__)
class ButPredicateTest < Test::Unit::TestCase
def test_terminal?
rule = ButPredicate.new
assert_equal(false, rule.terminal?)
end
def test_exec
rule = ButPredicate.new('abc')
events = rule.exec(Input.new('def'))
assert_equal([rule, CLOSE, 3], events)
events = rule.exec(Input.new('defabc'))
assert_equal([rule, CLOSE, 3], events)
end
def test_exec_miss
rule = ButPredicate.new('abc')
events = rule.exec(Input.new('abc'))
assert_equal([], events)
end
def test_consumption
rule = ButPredicate.new(Sequence.new(['a', 'b', 'c']))
input = Input.new('def')
events = rule.exec(input)
assert_equal(3, input.pos)
input = Input.new('defabc')
events = rule.exec(input)
assert_equal(3, input.pos)
end
def test_to_s
rule = ButPredicate.new('a')
assert_equal('~"a"', rule.to_s)
end
def test_to_s_with_label
rule = ButPredicate.new('a')
rule.label = 'a_label'
assert_equal('a_label:~"a"', rule.to_s)
end
end
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