add lib and testing demo starter code

Author: CarlyLanglois

lib/hamcrest-core-1.3.jar

@@ -0,0 +1,88 @@
+package org.launchcode.java.demos.testing.main;
+
+public class Car {
+
+    private String make;
+    private String model;
+    private int gasTankSize;
+    private double gasTankLevel;
+    private double milesPerGallon;
+    private double odometer = 0;
+
+    public Car(String make, String model, int gasTankSize, double milesPerGallon) {
+        this.make = make;
+        this.model = model;
+        this.gasTankSize = gasTankSize;
+        // Gas tank level defaults to a full tank
+        this.gasTankLevel = gasTankSize;
+        this.milesPerGallon = milesPerGallon;
+    }
+
+    public String getMake() {
+        return make;
+    }
+
+    public void setMake(String make) {
+        this.make = make;
+    }
+
+    public String getModel() {
+        return model;
+    }
+
+    public void setModel(String model) {
+        this.model = model;
+    }
+
+    public int getGasTankSize() {
+        return gasTankSize;
+    }
+
+    public void setGasTankSize(int gasTankSize) {
+        this.gasTankSize = gasTankSize;
+    }
+
+    public double getGasTankLevel() {
+        return gasTankLevel;
+    }
+
+    public void setGasTankLevel(double gasTankLevel) {
+        if (gasTankLevel > this.getGasTankLevel()) {
+            throw new IllegalArgumentException("Can't exceed tank size");
+        }
+        this.gasTankLevel = gasTankLevel;
+    }
+
+    public double getMilesPerGallon() {
+        return milesPerGallon;
+    }
+
+    public void setMilesPerGallon(double milesPerGallon) {
+        this.milesPerGallon = milesPerGallon;
+    }
+
+    public double getOdometer() {
+        return odometer;
+    }
+
+    /**
+     * Drive the car an amount of miles. If not enough fuel, drive as far as fuel allows.
+     * Adjust fuel levels based on amount needed to drive the distance requested.
+     * Add miles to odometer.
+     *
+     * @param miles - the miles to drive
+     */
+    public void drive(double miles)
+    {
+        //adjust fuel based on mpg and miles requested to drive
+        double maxDistance = this.milesPerGallon * this.gasTankLevel;
+        double milesAbleToTravel = miles > maxDistance ? maxDistance : miles;
+        double gallonsUsed = milesAbleToTravel / this.milesPerGallon;
+        this.gasTankLevel = this.gasTankLevel - gallonsUsed;
+        this.odometer += milesAbleToTravel;
+    }
+
+    public void addGas(double gas) {
+        this.setGasTankLevel(gas + this.getGasTankLevel());
+    }
+}

lib/junit-4.13-beta-3.jar

@@ -0,0 +1,9 @@
+package org.launchcode.java.demos.testing.main;
+
+public class Main {
+
+    public static void main(String[] args) {
+        Car car = new Car("Toyota", "Prius", 10, 50);
+        System.out.println(car.getMake() + " - " + car.getModel());
+    }
+}

src/org/launchcode/java/demos/testing/main/Car.java

@@ -0,0 +1,4 @@
+package org.launchcode.java.demos.testing.test;
+
+public class CarTest {
+}