Verifier (JUnit API)
Date: 2011-08-22

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## org.junit.rules
Class Verifier

    java.lang.Object
      org.junit.rules.Verifier

All Implemented Interfaces:
  TestRule

Direct Known Subclasses:
  ErrorCollector

    public class Verifier

extends Object
implements TestRule

Verifier is a base class for Rules like ErrorCollector, which can turn otherwise passing test methods into failing tests if a verification check is failed

         public static class ErrorLogVerifier() {
            private ErrorLog errorLog = new ErrorLog();

            @Rule
            public MethodRule verifier = new Verifier() {
               @Override public void verify() {
                  assertTrue(errorLog.isEmpty());
               }
            }

            @Test public void testThatMightWriteErrorLog() {
               // ...
            }
         }

Constructor Summary
`Verifier()`

Method Summary
`Statement` | `apply(Statement base, Description description)` Modifies the method-running `Statement` to implement this test-running rule.
`protected void` | `verify()` Override this to add verification logic.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Verifier

    public Verifier()

Method Detail

### apply

    public Statement apply(Statement base,
                           Description description)

  Description copied from interface: `TestRule`
  Modifies the method-running `Statement` to implement this test-running rule.

  Specified by:
    `apply` in interface `TestRule`
  Parameters:
    `base` - The `Statement` to be modified
    `description` - A `Description` of the test implemented in `base`
  Returns:
    a new statement, which may be the same as `base`, a wrapper around `base`, or a completely new Statement.

### verify

    protected void verify()
                   throws Throwable

  Override this to add verification logic. Overrides should throw an exception to indicate that verification failed.

  Throws:
    `Throwable`

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