MethodRule (JUnit API 文档)

所有已知实现类:
TestWatchman
```
public interface MethodRule
```
A MethodRule is an alteration in how a test method is run and reported. Multiple MethodRules can be applied to a test method. The Statement that executes the method is passed to each annotated Rule in turn, and each may return a substitute or modified Statement, which is passed to the next Rule, if any. For examples of how this can be useful, see these provided MethodRules, or write your own:
- ErrorCollector: collect multiple errors in one test method
- ExpectedException: make flexible assertions about thrown exceptions
- ExternalResource: start and stop a server, for example
- TemporaryFolder: create fresh files, and delete after test
- TestName: remember the test name for use during the method
- TestWatchman: add logic at events during method execution
- Timeout: cause test to fail after a set time
- Verifier: fail test if object state ends up incorrect
Note that MethodRule has been replaced by TestRule, which has the added benefit of supporting class rules.
从以下版本开始:
4.7

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`Statement`	`apply(Statement base, FrameworkMethod method, Object target)`	Modifies the method-running `Statement` to implement an additional test-running rule.

- 方法详细资料
  - apply
```
Statement apply(Statement base,
                FrameworkMethod method,
                Object target)
```
    Modifies the method-running Statement to implement an additional test-running rule.
    参数:
    base - The Statement to be modified
    method - The method to be run
    target - The object on which the method will be run.
    返回:
    a new statement, which may be the same as base, a wrapper around base, or a completely new Statement.