1
@Test (expected=ArithmeticException. class )
public void testDivide() {
assertEquals(
3
,Math.divide(
9
,
3
));
Math.divide(
10
,
0
);
//除数不能为0,会抛出异常
}
junit4中不用try catach了,用这样声明
“@Test(expected=ArithmeticException.class)”Junit4
就会检查此方法是否抛出ArithmeticException异常,
2)
套件方面
import org.junit.runner.RunWith;
import org.junit.runners.Suite;
import org.junit.runners.Suite.SuiteClasses;
@RunWith (Suite. class )
@SuiteClasses ({a. class ,
b. class })
public class Util4Suite {
}
则a,b两个类都要运行测试
3) 参数化测试
import
static
org.junit.Assert.assertEquals;
import
org.junit.Test;
import
org.junit.runner.RunWith;
import
org.junit.runners.Parameterized;
import
org.junit.runners.Parameterized.Parameters;
import
java.util.Arrays;
import
java.util.Collection;
@RunWith(Parameterized.
class
)
public
class
SquareTest
{
private
static
Calculator calculator
=
new
Calculator();
private
int
param;
private
int
result;
@Parameters
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());
}
}