-- Give the colours whatever values are convenient
black = undefined
brown = undefined
red = undefined
orange = undefined
yellow = undefined
green = undefined
blue = undefined
violet = undefined
grey = undefined
white = undefined
gold = undefined
silver = undefined

function decode_resistance(colours)
   -- Your solution here
end

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

local luaunit = require("luaunit.luaunit")

function test_violet_orange_black_is_73_ohms()
   local resistance = decode_resistance({violet, orange, black})
   luaunit.assertEquals(resistance, 73)
end

function test_brown_green_black_is_15_ohms()
   local resistance = decode_resistance({brown, green, black})
   luaunit.assertEquals(resistance, 15)
end

function test_green_blue_orange_is_56_kiloohms()
   local resistance = decode_resistance({green, blue, orange})
   luaunit.assertEquals(resistance, 56000)
end

function test_white_yellow_yellow_is_940_kiloohms()
   local resistance = decode_resistance({white, yellow, yellow})
   luaunit.assertEquals(resistance, 940000)
end

function test_orange_red_silver_is_320_milliohms()
   local resistance = decode_resistance({orange, red, silver})
   luaunit.assertEquals(resistance, 0.32)
end

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