Use PHPUnit\Framework\TestCase instead of PHPUnit_Framework_TestCase (#202)

Author: carusogabriel

Tests/IntegrationTest.php

@@ -15,12 +15,13 @@
 use Cache\Hierarchy\HierarchicalPoolInterface;
 use Cache\Namespaced\NamespacedCachePool;
 use Memcached;
+use PHPUnit\Framework\TestCase;
 use Psr\Cache\CacheItemPoolInterface;
 
 /**
  * @author Tobias Nyholm <[email protected]>
  */
-class IntegrationTest extends \PHPUnit_Framework_TestCase
+class IntegrationTest extends TestCase
 {
     /**
      * @type CacheItemPoolInterface|HierarchicalPoolInterface

Tests/NamespacedCachePoolTest.php

@@ -12,14 +12,15 @@
 namespace Cache\Namespaced\Tests;
 
 use Cache\Namespaced\NamespacedCachePool;
+use PHPUnit\Framework\TestCase;
 use Psr\Cache\CacheItemInterface;
 
 /**
  * We should not use constants on interfaces in the tests. Tests should break if the constant is changed.
  *
  * @author Tobias Nyholm <[email protected]>
  */
-class NamespacedCachePoolTest extends \PHPUnit_Framework_TestCase
+class NamespacedCachePoolTest extends TestCase
 {
     /**
      * @return \PHPUnit_Framework_MockObject_MockObject