fix(veml7700): broken render function

Author: mnishiguchi

lib/circuits_sim/device/veml7700.ex

@@ -124,8 +124,7 @@ defmodule CircuitsSim.Device.VEML7700 do
 
     @impl I2CDevice
     def render(state) do
-      light_lux = Float.round(state.light_lux * 1.0, 3)
-      "Light: #{light_lux} lux"
+      "Ambient light sensor raw output: #{state.als_output}"
     end
 
     @impl I2CDevice

test/circuits_sim/device/veml7700_test.exs

@@ -15,6 +15,11 @@ defmodule CircuitsSim.Device.VEML7700Test do
     [i2c_bus: i2c_bus]
   end
 
+  test "setting VEML7700 state", %{i2c_bus: i2c_bus} do
+    VEML7700Sim.set_state(i2c_bus, @i2c_address, als_output: 123)
+    assert I2CServer.render(i2c_bus, @i2c_address) == "Ambient light sensor raw output: 123"
+  end
+
   test "reads and writes registers", %{i2c_bus: i2c_bus} do
     VEML7700Sim.set_state(i2c_bus, @i2c_address, als_config: 0, als_output: 440)
 

test/circuits_sim_test.exs

@@ -1,4 +1,8 @@
 defmodule CircuitsSimTest do
   use ExUnit.Case
   doctest CircuitsSim
+
+  test "info/0 does not crash" do
+    CircuitsSim.info()
+  end
 end