Create resistor colours exercise

basic/resistor_colours.lua

@@ -0,0 +1,49 @@
+-- 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 -----------------------------------------------------------------------
+
+package.path = package.path .. ";../luaunit/?.lua"
+local luaunit = require("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())