require 'test/unit'
def empty?(s)
s.length == 0
end
class EmptyTest < Test::Unit::TestCase
def setup
@empty_string = ''
@one_char_string = 'X'
@long_string = 'this is a test'
@empty_array = []
@one_element_array = [1]
@long_array = [1, 2, 3, 4, 5, 6]
end
def test_empty_on_strings
assert empty?(@empty_string)
assert ! empty?(@one_char_string)
assert ! empty?(@long_string)
end
def test_empty_on_arrays
assert empty?(@empty_array)
assert ! empty?(@one_element_array)
assert ! empty?(@long_array)
end
end
# $ ruby empty_test.rb