-- Solution --------------------------------------------------------------------
function nth_fibonacci_number(n)
	-- Your implementation here
end

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

local luaunit = require("luaunit.luaunit")

function test_3rd_fibonacci_number_is_2()
	luaunit.assertEquals(nth_fibonacci_number(3), 2)
end

function test_5th_fibonacci_number_is_5()
	luaunit.assertEquals(nth_fibonacci_number(5), 5)
end

function test_10th_fibonacci_number_is_55()
	luaunit.assertEquals(nth_fibonacci_number(10), 55)
end

function test_20th_fibonacci_number_is_6765()
	luaunit.assertEquals(nth_fibonacci_number(20), 6765)
end

function test_80th_fibonacci_number_is_23416728348467685()
	luaunit.assertEquals(nth_fibonacci_number(80), 23416728348467685)
end

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