[8.x] Add assertBatchCount (#40217)

* Add assertBatchCount

* Add doc-block to facade

* Fix doc-block

* Update BusFake.php

Co-authored-by: Taylor Otwell <[email protected]>

Author: chrysanthos

src/Illuminate/Support/Facades/Bus.php

@@ -24,6 +24,7 @@
  * @method static void assertDispatchedAfterResponseTimes(string $command, int $times = 1)
  * @method static void assertNotDispatchedAfterResponse(string|\Closure $command, callable $callback = null)
  * @method static void assertBatched(callable $callback)
+ * @method static void assertBatchCount(int $count)
  * @method static void assertChained(array $expectedChain)
  * @method static void assertDispatchedSync(string|\Closure $command, callable $callback = null)
  * @method static void assertDispatchedSyncTimes(string $command, int $times = 1)

src/Illuminate/Support/Testing/Fakes/BusFake.php

@@ -413,6 +413,19 @@ public function assertBatched(callable $callback)
         );
     }
 
+    /**
+     * Assert the number of batches that have been dispatched.
+     *
+     * @param  int  $count
+     * @return void
+     */
+    public function assertBatchCount($count)
+    {
+        PHPUnit::assertCount(
+            $count, $this->batches,
+        );
+    }
+
     /**
      * Get all of the jobs matching a truth-test callback.
      *