Fixes #4755: `yii\test\BaseActiveFixture::unload()` does not clean up the internal cached data

extensions/mongodb/ActiveFixture.php

@@ -69,7 +69,7 @@ class ActiveFixture extends BaseActiveFixture
     /**
      * Unloads the fixture.
      *
-     * The default implementation will clean up the colection by calling [[resetCollection()]].
+     * The default implementation will clean up the collection by calling [[resetCollection()]].
      */
     public function unload()
     {

framework/CHANGELOG.md

@@ -84,6 +84,7 @@ Yii Framework 2 Change Log
 - Bug #4654: Fixed issue with PostgreSQL and inserting boolean values with batch insert (cebe)
 - Bug #4672: Fixed issue with PostgreSQL handling of boolean values in queries, dropped support for using boolean value for integer columns (cebe)
 - Bug #4727: Fixed wrong Stylus definition in `\yii\web\AssetConverter` (samdark)
+- Bug #4755: `yii\test\BaseActiveFixture::unload()` does not clean up the internal cached data (qiangxue)
 - Bug #4813: Fixed MSSQL schema that was getting incorrect info about constraints (samdark, SerjRamone, o-rey)
 - Bug #4880: Return value of yii\web\Request::getPrefferedLanguage() was a normalized value instead of a valid language value from the input array (cebe)
 - Bug: Fixed inconsistent return of `\yii\console\Application::runAction()` (samdark)

framework/test/BaseActiveFixture.php

@@ -106,6 +106,9 @@ abstract class BaseActiveFixture extends DbFixture implements \IteratorAggregate
         }
     }
 
+    /**
+     * @inheritdoc
+     */
     public function unload()
     {
         parent::unload();