testbubblesort.java

来自「著名的uncle Bob的Agile software development的」· Java 代码 · 共 70 行

import junit.framework.TestCase;

public class TestBubbleSort extends TestCase
{
  public static void main(String[] args)
  {
    junit.swingui.TestRunner.main(args);
  }
  public TestBubbleSort(String name)
  {
    super(name);
  }

  public void testEmptyArray()
  {
    int[] array = new int[0];
    int operations = BubbleSorter.sort(array);
    assertEquals(0, operations);
  }

  public void testArrayWithOneElement()
  {
    int[] array = {0};
    int operations = BubbleSorter.sort(array);
    assertEquals(0, operations);
    assertEquals(0, array[0]);
    assertEquals(1, array.length);
  }

  public void testArrayWithTwoInOrderElements()
  {
    int[] array = {0,1};
    int operations = BubbleSorter.sort(array);
    assertEquals("operations",1, operations);
    assertEquals(0, array[0]);
    assertEquals(1, array[1]);
    assertEquals(2, array.length);
  }

  public void testArrayWithTwoOutOfOrderElements()
  {
    int[] array = {1,0};
    int operations = BubbleSorter.sort(array);
    assertEquals("operations",1, operations);
    assertEquals("array[0]", 0, array[0]);
    assertEquals("array[1]", 1, array[1]);
    assertEquals(2, array.length);
  }

  public void testArrayWithThreeOutOfOrderElements()
  {
    int[] array = {3,2,1};
    int operations = BubbleSorter.sort(array);
    assertEquals("operations", 3, operations);
    assertEquals("array[0]", 1, array[0]);
    assertEquals("array[1]", 2, array[1]);
    assertEquals("array[2]", 3, array[2]);
    assertEquals(3, array.length);
  }

  public void testArrayWithTenOutOfOrderElements()
  {
    int[] array = {9,8,7,6,5,4,3,2,1,0};
    int operations = BubbleSorter.sort(array);
    assertEquals("operations", 45, operations);
    for (int i=0; i<10; i++)
      assertEquals("array["+i+"]", i, array[i]);
  }

}