测试一下“计算一个数的平方”这个函数

public class CalculatorTest {
	private static Calculator calculator = new Calculator();//这个类要自己写

	@Before
	public void clearCalculator() {
		calculator.clear();
	}
	@Test
	public void square1() {
		calculator.square(2);
		assertEquals(4, calculator.getResult());
	}
	@Test
	public void square2() {
		calculator.square(0);
		assertEquals(0, calculator.getResult());
	}
	@Test
	public void square3() {
		calculator.square(-3);
		assertEquals(9, calculator.getResult());
	}
}

@RunWith(Parameterized.class)
public class SquareTest {
	private static Calculator calculator = new Calculator();
	private int param;
	private int result;

	@Parameters
        //输入的参数和预期的结果
	public static Collection data() {
		return Arrays.asList(new Object[][] { { 2, 4 }, { 0, 0 }, { -3, 9 }, });
	}
	// 构造函数，对变量进行初始化
	public SquareTest(int param, int result) {
		this.param = param;
		this.result = result;
	}
	@Test
	public void square() {
		calculator.square(param);
		assertEquals(result, calculator.getResult());
	}
}