fix test preparations for observation

Author: dbu

tests/12_Observation/ObservationManagerTest.php

@@ -99,15 +99,15 @@ public function testFilteredEventJournalUuid()
 
     public function testFilteredEventJournalNodeType()
     {
+        $session = self::$loader->getSession();
+        $root = $session->getRootNode();
+        $node = $root->addNode('/tests_observation');
+        $session->save();
         sleep(1); // To avoid having the same date as the journal entries generated by the fixtures loading or other tests
 
         $curTime = strtotime('now');
-        $session = self::$loader->getSession();
         $om = $session->getWorkspace()->getObservationManager();
 
-        // Make the root node have a UUID
-        $root = $session->getRootNode();
-        $node = $root->addNode('/tests_observation');
         $node->addNode('unstructured');
         $session->save();
 
@@ -119,7 +119,7 @@ public function testFilteredEventJournalNodeType()
         $journal = $om->getEventJournal($filter);
         $journal->skipTo($curTime);
 
-        // At this point the journal
+        // At this point the journal should only contain the NODE_ADDED event
         $this->assertTrue($journal->valid());
         $this->assertEquals('/tests_observation/unstructured', $journal->current()->getPath());
         $this->assertEquals(EventInterface::NODE_ADDED, $journal->current()->getType());