delete unstable tests and skip redis tests if the redis extension is not installed

tests/BatchSnowflakeIDTest.php

@@ -35,19 +35,6 @@ public function test_batch_for_same_instance_with_default_driver(): void
         $this->assertCount($count, $ids);
     }
 
-    public function test_batch_for_diff_instance_with_default_driver(): void
-    {
-        $ids = [];
-        $count = 100_000; // 100k
-
-        for ($i = 0; $i < $count; $i++) {
-            $ids[(new Snowflake())->id()] = 1;
-        }
-
-        // This pattern will result in generating duplicate IDs.
-        $this->assertGreaterThan(90000, count($ids));
-    }
-
     /**
      * @throws Throwable
      */

tests/FileLockResolverTest.php

@@ -18,6 +18,7 @@
 class FileLockResolverTest extends TestCase
 {
     private FileLockResolver $fileLocker;
+
     /** @var callable */
     private $defer;
 

tests/RedisSequenceResolverTest.php

@@ -17,6 +17,13 @@
 
 class RedisSequenceResolverTest extends TestCase
 {
+    public function setUp(): void
+    {
+        if (! extension_loaded('redis')) {
+            $this->markTestSkipped('Redis extension is not installed');
+        }
+    }
+
     public function test_invalid_redis_connect(): void
     {
         $redis = $this->createMock(\Redis::class);
@@ -57,10 +64,6 @@ public function test_set_cache_prefix(): void
      */
     public function test_real_redis(): void
     {
-        if (! extension_loaded('redis')) {
-            $this->markTestSkipped('Redis extension is not installed.');
-        }
-
         if (! ($host = getenv('REDIS_HOST')) || ! ($port = getenv('REDIS_PORT'))) {
             $this->markTestSkipped('Redis host or port is not set, skip real redis test.');
         }