assertResourceNotAvailable example

      return $headers;
    };
    $get_headers = $header_cleaner($get_headers);
    $head_headers = $header_cleaner($head_headers);
    $this->assertSame($get_headers, $head_headers);

    $this->resourceConfigStorage->load(static::$resourceConfigId)->disable()->save();
    $this->refreshTestStateAfterRestConfigChange();

    // DX: upon disabling a resource, it's immediately no longer available.     $this->assertResourceNotAvailable($url, $request_options);

    $this->resourceConfigStorage->load(static::$resourceConfigId)->enable()->save();
    $this->refreshTestStateAfterRestConfigChange();

    // DX: upon re-enabling a resource, immediate 200.     $response = $this->request('GET', $url, $request_options);
    $this->assertResourceResponse(200, FALSE, $response, $this->getExpectedCacheTags(), $this->getExpectedCacheContexts(), static::$auth ? FALSE : 'MISS', $is_cacheable_by_dynamic_page_cache ? 'MISS' : 'UNCACHEABLE');

    $this->resourceConfigStorage->load(static::$resourceConfigId)->delete();
    $this->refreshTestStateAfterRestConfigChange();