Enumerate the exercises

04_resistor_colours.lua

@@ -0,0 +1,39 @@
+-- Write a function to determine the resistance (in ohms) of a given
+-- three-part resistor colour code.  The colour code is passed as a
+-- list of strings.
+--
+-- Solution --------------------------------------------------------------------
+function decode_resistance(colours)
+	-- Your implementation 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())