Remove unnecessary query against the session table in WebTestBase

+++ b/core/modules/simpletest/src/WebTestBase.php
@@ -711,9 +711,18 @@ protected function drupalUserIsLoggedIn($account) {
+    $session_id = $account->session_id;
+    $request_stack = $this->container->get('request_stack');
+    $request = clone $request_stack->getCurrentRequest();
+    $cookies = $request->cookies->all();
+    foreach ($this->cookies as $name => $value) {
+      $cookies[$name] = $value['value'];
+    }
+    $request->cookies->replace($cookies);
+    $request_stack->push($request);
+    $logged_in = (bool) $this->container->get('session_manager')->getSaveHandler()->read($session_id);
+    $request_stack->pop();
+    return $logged_in;

Its a little bit sad how much effort you need in order to figure this out. At least the new code does not hardcode the hashing algorithm. Note: There is a helper $request->duplicate(NULL, NULL, NULL, NULL, $cookies); which would make the code a bit easier.

Cool

Back to RTBC.

Test changes are not frozen in beta. Committed e4e8f31 and pushed to 8.0.x. Thanks!