[12.x] memoize result of Application@eventsAreCached() (#57709)

* memoize result of eventsAreCached

* Update FoundationApplicationTest.php

* Update FoundationApplicationTest.php

* Update Application.php

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

Author: cosmastech

src/Illuminate/Foundation/Application.php

@@ -1350,7 +1350,13 @@ public function getCachedRoutesPath()
      */
     public function eventsAreCached()
     {
-        return $this['files']->exists($this->getCachedEventsPath());
+        if ($this->bound('events.cached')) {
+            return (bool) $this->make('events.cached');
+        }
+
+        return $this->instance(
+            'events.cached', $this['files']->exists($this->getCachedEventsPath())
+        );
     }
 
     /**

tests/Foundation/FoundationApplicationTest.php

@@ -620,23 +620,36 @@ public function test_routes_are_cached()
     public function test_routes_are_not_cached_by_instance_falls_back_to_file()
     {
         $app = new Application();
-        $files = new class
-        {
-            public string $pathRequested;
-
-            public function exists(string $path): bool
-            {
-                $this->pathRequested = $path;
-
-                return false;
-            }
-        };
+        $files = new FileExistsFake;
         $app->instance('files', $files);
 
         $this->assertFalse($app->routesAreCached());
         $this->assertStringContainsString('routes-v7.php', $files->pathRequested);
     }
 
+    public function test_events_are_cached_uses_container_instance()
+    {
+        $app = new Application();
+        $app->instance('events.cached', true);
+        $files = new FileExistsFake;
+        $app->instance('files', $files);
+
+        $this->assertTrue($app->eventsAreCached());
+        $this->assertFalse(isset($files->pathRequested));
+    }
+
+    public function test_events_are_cached_checks_filesystem_if_not_set()
+    {
+        $app = new Application();
+        $files = new FileExistsFake;
+        $app->instance('files', $files);
+
+        $this->assertFalse($app->eventsAreCached());
+        $this->assertStringContainsString('events.php', $files->pathRequested);
+        $this->assertTrue($app->bound('events.cached'));
+        $this->assertFalse($app->make('events.cached'));
+    }
+
     public function testCoreContainerAliasesAreRegisteredByDefault(): void
     {
         $app = new Application();
@@ -782,3 +795,15 @@ public function terminate()
         return self::$counter++;
     }
 }
+
+class FileExistsFake
+{
+    public string $pathRequested;
+
+    public function exists(string $path): bool
+    {
+        $this->pathRequested = $path;
+
+        return false;
+    }
+}