Test注解的两个可选参数 expected timeout
The Test annotation supports two optional parameters.
The first, expected, declares that a test method should throw an exception.
If it doesn't throw an exception or if it throws a different exception than the one declared, the test fails.
@Test(expected = Exception.class)
public void Test() {
}
The second optional parameter, timeout, causes a test to fail if it takes longer than a specified amount of clock time (measured in milliseconds).
@Test(timeout = 1000)
public void Test() {
}