# TODO: Replace examples and use TDD development by writing your own tests
# These are some of the methods available:
#   test.expect(boolean, [optional] message)
#   test.assert_equals(actual, expected, [optional] message)
#   test.assert_not_equals(actual, expected, [optional] message)

# You can use Test.describe and Test.it to write BDD style test groupings

test.assert_equals(common_substring("Hello", "lo"), True)
test.assert_equals(common_substring("Hello", "."), False)
test.assert_equals(common_substring("HELLO", "hello"), False)
test.assert_equals(common_substring("racecar", "car"), True)