## org.apache.lucene.util
Class TestRuleFieldCacheSanity

    java.lang.Object
      org.apache.lucene.util.TestRuleFieldCacheSanity

All Implemented Interfaces:
  org.junit.rules.TestRule

    public class TestRuleFieldCacheSanity

extends Object
implements org.junit.rules.TestRule

This rule will fail the test if it has insane field caches.

calling assertSaneFieldCaches here isn't as useful as having test classes call it directly from the scope where the index readers are used, because they could be gc'ed just before this tearDown method is called.

But it's better then nothing.

If you are testing functionality that you know for a fact "violates" FieldCache sanity, then you should either explicitly call purgeFieldCache at the end of your test method, or refactor your Test class so that the inconsistent FieldCache usages are isolated in distinct test methods

See Also:
  `FieldCacheSanityChecker`

Constructor Summary
`TestRuleFieldCacheSanity()`

Method Summary
`org.junit.runners.model.Statement` `apply(org.junit.runners.model.Statement s, Description d)`

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

Constructor Detail

### TestRuleFieldCacheSanity

    public TestRuleFieldCacheSanity()

Method Detail

### apply

    public org.junit.runners.model.Statement apply(org.junit.runners.model.Statement s,
                                                   Description d)

  Specified by:
    `apply` in interface `org.junit.rules.TestRule`

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