Car Class with Tests

Car.java

package javaapplication30;

/**
 * a class that shows a cars model year, the company and model of the car as 
 * well as the cars speed
 */
public class Car {
  private int modelYear, speed;
  private String makeModel;

  public Car(int year, String makeModel){//constructo for car
    this.modelYear = year;
    this.makeModel = makeModel;
    this.speed = 0;
  }

  public int getModelYear(){//gets the cars model year
	  return this.modelYear;
  }

  public String getMakeAndModel(){//gets cars make and model
	  return this.makeModel;
  }

  public int getSpeed(){//gets cars current speed
	  return this.speed;
  }

  /**
   * increases the cars speed by 5
   */
  public void accelerate(){
	  this.speed += 5;
  }

  /**
   * decreases cars speed by 5
   */
  public void brake(){
	  this.speed -= 5;
  }

  public static void test(){
  	if(test_accelerate()){
  	  System.out.println("Accelerate passed");
  	}else{
  	  System.out.println("Accelerate failed");
  	}
  
  	if(test_brake()){
  	  System.out.println("Brake passed");
  	}else{
  	  System.out.println("Brake failed");
  	}
  }

  public static boolean test_accelerate(){
  	Car c = new Car(200, "HI");
  	c.accelerate();
  	return c.getSpeed() == 5;
  }
  
  private static boolean test_brake() {
  	Car c = new Car(200, "HI");
  	c.brake();
  	return c.getSpeed() == -5;
  } 
}