Unit Tests for CheckRectangle

CheckRectangleTest.java

package test;

import static org.junit.Assert.*;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

import org.junit.Test;

public class CheckRectangleTest{
   List<CheckRectangle.Point> points  = new ArrayList<>();
   
   @Test
   public void testSinglePoint(){
      points.add(new CheckRectangle.Point(10,10));
      
      assertTrue(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testSinglePoint_double(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(10,10));
      
      assertTrue(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testVerticalLine(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(10,11));
      points.add(new CheckRectangle.Point(10,12));
      points.add(new CheckRectangle.Point(10,13));
      points.add(new CheckRectangle.Point(10,14));
      
      Collections.shuffle(points, new Random(0));
      
      assertTrue(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testVerticalLine_missingBit(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(10,11));
      points.add(new CheckRectangle.Point(10,12));
      //points.add(new CheckRectangle.Point(10,13));
      points.add(new CheckRectangle.Point(10,14));
      points.add(new CheckRectangle.Point(10,14)); // double
      
      Collections.shuffle(points, new Random(0));
      
      assertFalse(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testHorizontalLine(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(11,10));
      points.add(new CheckRectangle.Point(12,10));
      points.add(new CheckRectangle.Point(13,10));
      points.add(new CheckRectangle.Point(14,10));
      points.add(new CheckRectangle.Point(15,10));
      
      Collections.shuffle(points, new Random(0));
      
      assertTrue(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testHorizontalLine_missingBit(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(11,10));
      //points.add(new CheckRectangle.Point(12,10));
      points.add(new CheckRectangle.Point(13,10));
      points.add(new CheckRectangle.Point(14,10));
      points.add(new CheckRectangle.Point(15,10));
      
      Collections.shuffle(points, new Random(0));
      
      assertFalse(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testSquare(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(10,11));
      points.add(new CheckRectangle.Point(10,12));
      points.add(new CheckRectangle.Point(10,13));
      
      points.add(new CheckRectangle.Point(11,13));
      points.add(new CheckRectangle.Point(12,13));
      points.add(new CheckRectangle.Point(13,13));
      
      points.add(new CheckRectangle.Point(13,12));
      points.add(new CheckRectangle.Point(13,11));
      points.add(new CheckRectangle.Point(13,10));
      
      points.add(new CheckRectangle.Point(12,10));
      points.add(new CheckRectangle.Point(11,10));
      
      Collections.shuffle(points, new Random(0));
      
      assertTrue(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testSquare_doublepoints(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(10,11));
      points.add(new CheckRectangle.Point(10,12));
      points.add(new CheckRectangle.Point(10,12)); // double
      points.add(new CheckRectangle.Point(10,13));
      
      points.add(new CheckRectangle.Point(11,13));
      points.add(new CheckRectangle.Point(12,13));
      points.add(new CheckRectangle.Point(13,13));
      
      points.add(new CheckRectangle.Point(13,12));
      points.add(new CheckRectangle.Point(13,11));
      points.add(new CheckRectangle.Point(13,10));
      
      points.add(new CheckRectangle.Point(12,10));
      points.add(new CheckRectangle.Point(11,10));
      
      Collections.shuffle(points, new Random(0));
      
      assertTrue(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testSquare_missingBits(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(10,11));
      //points.add(new CheckRectangle.Point(10,12));
      points.add(new CheckRectangle.Point(10,13));
      
      points.add(new CheckRectangle.Point(11,13));
      points.add(new CheckRectangle.Point(12,13));
      points.add(new CheckRectangle.Point(13,13));
      
      points.add(new CheckRectangle.Point(13,12));
      points.add(new CheckRectangle.Point(13,11));
      points.add(new CheckRectangle.Point(13,10));
      
      points.add(new CheckRectangle.Point(12,10));
      points.add(new CheckRectangle.Point(11,10));
      
      Collections.shuffle(points, new Random(0));
      
      assertFalse(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testSquare_extraBits(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(10,11));
      points.add(new CheckRectangle.Point(10,12));
      points.add(new CheckRectangle.Point(10,13));
      
      points.add(new CheckRectangle.Point(11,11)); // extra bit
      
      points.add(new CheckRectangle.Point(11,13));
      points.add(new CheckRectangle.Point(12,13));
      points.add(new CheckRectangle.Point(13,13));
      
      points.add(new CheckRectangle.Point(13,12));
      points.add(new CheckRectangle.Point(13,11));
      points.add(new CheckRectangle.Point(13,10));
      
      points.add(new CheckRectangle.Point(12,10));
      points.add(new CheckRectangle.Point(11,10));
      
      Collections.shuffle(points, new Random(0));
      
      assertFalse(CheckRectangle.isRectangle(points));
   }
   
   @Test
   public void testCircle(){
      points.add(new CheckRectangle.Point(10,10));
      points.add(new CheckRectangle.Point(11,11));
      points.add(new CheckRectangle.Point(10,12));
      points.add(new CheckRectangle.Point(9,11));
      Collections.shuffle(points, new Random(0));
      
      assertFalse(CheckRectangle.isRectangle(points));
   }
}