-- Implement is_palindrome(), which should return whether the passed
-- string is palindromic (i.e the same forwards as it is backwards).
-- Ignore non-letters and case.
--
-- Solution --------------------------------------------------------------------
function is_palindrome(str)
	-- Your implementation here
end

-- Tests -----------------------------------------------------------------------

local luaunit = require("luaunit.luaunit")

function test_foo_is_not_palindrome()
	luaunit.assertFalse(is_palindrome("foo"))
end

function test_wow_is_palindrome()
	luaunit.assertTrue(is_palindrome("wow"))
end

function test_toast_is_not_palindrome()
	luaunit.assertFalse(is_palindrome("toast"))
end

function test_Racecar_is_palindrome()
	luaunit.assertTrue(is_palindrome("Race car"))
end

function test_Do_geese_see_God_is_palindrome()
	luaunit.assertTrue(is_palindrome("Do geese see God?"))
end

function test_No_lemons_no_melon_is_palindrome()
	luaunit.assertTrue(is_palindrome("No lemons, no melon."))
end

os.exit(luaunit.LuaUnit.run())