#include <Arduino.h>
#include <ArduinoUnit.h>

const int trigPin = 9;
const int echoPin = 10;
const int valvePin = 8;

const int LEVEL_MIN = 10;
const int LEVEL_MAX = 30;

bool isValveOpen = false;

long readUltrasonicDistance();
void valveOpen();
void valveClose();

test(readDistanceSimulated){
  long dist = readUltrasonicDistance();
  assertTrue(dist >= 10);
  assertTrue(dist < 400);
}

test(valveControl){
  valveClose();
  assertFalse(isValveOpen);
}

void setup(){
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(valvePin, OUTPUT);
}

void loop() {
  Test::run();
  long level = readUltrasonicDistance();
}

long readUltrasonicDistance(){
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(2);

  long duration = pulseIn(echoPin, HIGH);
  long distance = duration * 0.034 / 2;
  //Serial.println(distance);
  return distance;
}

void valveClose(){
  digitalWrite(valvePin, LOW );
  isValveOpen = false;
}