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require 'test/unit'
class TestComparable < Test::Unit::TestCase
def setup
@o = Object.new
@o.extend(Comparable)
end
def test_equal
def @o.<=>(x); 0; end
assert_equal(true, @o == nil)
def @o.<=>(x); 1; end
assert_equal(false, @o == nil)
def @o.<=>(x); raise; end
assert_equal(false, @o == nil)
end
def test_gt
def @o.<=>(x); 1; end
assert_equal(true, @o > nil)
def @o.<=>(x); 0; end
assert_equal(false, @o > nil)
def @o.<=>(x); -1; end
assert_equal(false, @o > nil)
end
def test_ge
def @o.<=>(x); 1; end
assert_equal(true, @o >= nil)
def @o.<=>(x); 0; end
assert_equal(true, @o >= nil)
def @o.<=>(x); -1; end
assert_equal(false, @o >= nil)
end
def test_lt
def @o.<=>(x); 1; end
assert_equal(false, @o < nil)
def @o.<=>(x); 0; end
assert_equal(false, @o < nil)
def @o.<=>(x); -1; end
assert_equal(true, @o < nil)
end
def test_le
def @o.<=>(x); 1; end
assert_equal(false, @o <= nil)
def @o.<=>(x); 0; end
assert_equal(true, @o <= nil)
def @o.<=>(x); -1; end
assert_equal(true, @o <= nil)
end
def test_between
def @o.<=>(x); 0 <=> x end
assert_equal(false, @o.between?(1, 2))
assert_equal(false, @o.between?(-2, -1))
assert_equal(true, @o.between?(-1, 1))
assert_equal(true, @o.between?(0, 0))
end
def test_err
assert_raise(ArgumentError) { 1.0 < nil }
assert_raise(ArgumentError) { 1.0 < Object.new }
end
end
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