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require 'minitest/autorun'
require 'psych'
module Psych
module Visitors
class TestYASTBuilder < MiniTest::Unit::TestCase
def setup
@v = Visitors::YASTBuilder.new
end
def test_circular_list
a = []
2.times { a << a }
assert_equal a.inspect, Psych.load(a.to_yaml).inspect
end
def test_scalar
assert_round_trip 'foo'
assert_round_trip ':foo'
assert_round_trip ''
end
def test_binary
string = [0, 123,22, 44, 9, 32, 34, 39].pack('C*')
assert_equal string, Psych.load(string.to_yaml)
end
def test_anon_class
assert_raises(TypeError) do
@v.accept Class.new
end
assert_raises(TypeError) do
Class.new.to_yaml
end
end
def test_hash
assert_round_trip('a' => 'b')
end
def test_list
assert_round_trip(%w{ a b })
end
def test_symbol
assert_round_trip :foo
end
def test_int
assert_round_trip 1
assert_round_trip(-1)
assert_round_trip '1'
assert_round_trip '-1'
end
def test_float
assert_round_trip 1.2
assert_round_trip '1.2'
assert Psych.load(Psych.dump(0.0 / 0.0)).nan?
assert_equal 1, Psych.load(Psych.dump(1 / 0.0)).infinite?
assert_equal(-1, Psych.load(Psych.dump(-1 / 0.0)).infinite?)
end
# http://yaml.org/type/null.html
def test_nil
assert_round_trip nil
assert_equal nil, Psych.load('null')
assert_equal nil, Psych.load('Null')
assert_equal nil, Psych.load('NULL')
assert_equal nil, Psych.load('~')
assert_equal({'foo' => nil}, Psych.load('foo: '))
assert_round_trip 'null'
assert_round_trip 'nUll'
assert_round_trip '~'
end
def assert_round_trip obj
v = Visitors::YASTBuilder.new
v.accept(obj)
assert_equal(obj, Psych.load(v.tree.to_yaml))
assert_equal(obj, Psych.load(obj.to_yaml))
assert_equal(obj, Psych.load(Psych.dump(obj)))
end
end
end
end
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