Issue #1146244 by Dean Reilly, fago: Add tests for ensuring node is fully saved when hook_node_insert() fires.

core/modules/node/lib/Drupal/node/Tests/NodeSaveTest.php

@@ -156,4 +156,20 @@ class NodeSaveTest extends NodeTestBase {
     $node = node_load($node->nid);
     $this->assertEqual($node->label(), 'updated_presave', 'Static cache has been cleared.');
   }
+
+  /**
+   * Tests saving a node on node insert.
+   *
+   * This test ensures that a node has been fully saved when hook_node_insert()
+   * is invoked, so that the node can be saved again in a hook implementation
+   * without errors.
+   *
+   * @see node_test_node_insert()
+   */
+  function testNodeSaveOnInsert() {
+    // node_test_node_insert() tiggers a save on insert if the title equals
+    // 'new'.
+    $node = $this->drupalCreateNode(array('title' => 'new'));
+    $this->assertEqual($node->title, 'Node ' . $node->nid, 'Node saved on node insert.');
+  }
 }

core/modules/node/tests/modules/node_test/node_test.module

@@ -161,3 +161,18 @@ function node_test_entity_view_mode_alter(&$view_mode, Drupal\Core\Entity\Entity
     $view_mode = $change_view_mode;
   }
 }
+
+/**
+ * Implements hook_node_insert().
+ *
+ * This tests saving a node on node insert.
+ *
+ * @see \Drupal\node\Tests\NodeSaveTest::testNodeSaveOnInsert()
+ */
+function node_test_node_insert(Node $node) {
+  // Set the node title to the node ID and save.
+  if ($node->title == 'new') {
+    $node->title = 'Node '. $node->nid;
+    node_save($node);
+  }
+}