chore: adjust assertion to match new behavior

- Adjust assertion to match new behavior
- Rename test cases

Author: yenfryherrerafeliz

tests/DynamoDb/DynamoDbClientTest.php

@@ -164,9 +164,9 @@ public function testValidatesAndRetriesCrc32()
         ];
 
         $handler = function ($request, $options) use (&$queue) {
-            // Test the custom retry policy.
+            // On retry, verify delay is within DynamoDB's 25ms base backoff range
             if (count($queue) == 1) {
-                $this->assertSame(0, $options['delay']);
+                $this->assertLessThanOrEqual(25, $options['delay']);
             }
 
             return \GuzzleHttp\Promise\Create::promiseFor(array_shift($queue));

tests/RetryMiddlewareV2Test.php

@@ -1152,13 +1152,11 @@ public function testReportsHttpStatsForEachRequestEvenIfRetryStatsDisabled()
         ], $httpStats);
     }
 
-    // ---- New spec-based tests ----
-
     /**
-     * Tests spec-based standard mode behavior with deterministic jitter.
+     * Tests standard mode behavior with deterministic jitter.
      */
-    #[DataProvider('specStandardModeTestCases')]
-    public function testSpecStandardMode(
+    #[DataProvider('standardModeNewTestCasesProvider')]
+    public function testStandardModeRetry(
         array $config,
         array $responseSequence,
         array $expectedOutcomes
@@ -1229,7 +1227,7 @@ public function testSpecStandardMode(
         }
     }
 
-    public static function specStandardModeTestCases(): array
+    public static function standardModeNewTestCasesProvider(): array
     {
         return [
             'Retry eventually succeeds' => [