基于测试的JAVA开发案例.ppt

Bowling Game Kata Scoring Bowling. The Requirements. A quick design session A quick design session A quick design session A quick design session A quick design session A quick design session Begin. Create a project named BowlingGame Create a unit test named BowlingGameTest Begin. Create a project named BowlingGame Create a unit test named BowlingGameTest The first test. The first test. The first test. The first test. The first test. The first test. The first test. The first test. The Second test. The Second test. The Second test. The Second test. The Second test. The Second test. The Second test. The Second test. The Second test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Third test. The Fourth test. The Fourth test. The Fourth test. The Fourth test. The Fourth test. The Fifth test. End import junit.framework.TestCase; public class BowlingGameTest extends TestCase { private Game g; protected void setUp() throws Exception { g = new Game(); } private void rollMany(int n, int pins) { for (int i = 0; i n; i++) g.roll(pins); } public void testGutterGame() throws Exception { rollMany(20, 0); assertEquals(0, g.score()); } public void testAllOnes() throws Exception { rollMany(20,1); assertEquals(20, g.score()); } public void testOneSpare() throws Exception { g.roll(5); g.roll(5); // spare g.roll(3); rollMany(17,0); assertEquals(16,g.score()); } } public class Game { private int score = 0; public void roll(int pins) { score += pins; } public int score() { return score; } } - ugly comment in test. roll() calculates score, but name does not imply that. score() does not calculate score, but name implies that it does. Design is wrong. Responsibilities