diff --git a/tests/src/Functional/JsonApiFunctionalTest.php b/tests/src/Functional/JsonApiFunctionalTest.php
index 766b864..6da6396 100644
--- a/tests/src/Functional/JsonApiFunctionalTest.php
+++ b/tests/src/Functional/JsonApiFunctionalTest.php
@@ -244,61 +244,137 @@ class JsonApiFunctionalTest extends JsonApiFunctionalTestBase {
     ]));
     $this->assertSession()->statusCodeEquals(200);
     $this->assertGreaterThanOrEqual(1, count($single_output['data']));
-    // 19. Test filtering with OR and AND group (Grouping grouped filters).
+    // 19. Test non-existing route without 'Accept' header.
+    $this->drupalGet('/jsonapi/node/article/broccoli');
+    $this->assertSession()->statusCodeEquals(404);
+    // Without the 'Accept' header we cannot know we want the 404 error
+    // formatted as JSON API.
+    $this->assertSession()->responseHeaderContains('Content-Type', 'text/html');
+    // 20. Test non-existing route with 'Accept' header.
+    $single_output = Json::decode($this->drupalGet('/jsonapi/node/article/broccoli', [], [
+      'Accept' => 'application/vnd.api+json',
+    ]));
+    $this->assertEquals(404, $single_output['errors'][0]['status']);
+    $this->assertSession()->statusCodeEquals(404);
+    // With the 'Accept' header we can know we want the 404 error formatted as
+    // JSON API.
+    $this->assertSession()->responseHeaderContains('Content-Type', 'application/vnd.api+json');
+
+    // Test documentation filtering examples.
+    // 1. Only get published nodes.
     $filter = [
-      'and-group' => [
-        'group' => [
-          'conjunction' => 'AND',
+      'status-filter' => [
+        'condition' => [
+          'path' => 'status',
+          'value' => 1,
         ],
       ],
-      'or-group' => [
-        'group' => [
-          'conjunction' => 'OR',
-          'memberOf' => 'and-group',
+    ];
+    $collection_output = Json::decode($this->drupalGet('/jsonapi/node/article', [
+      'query' => ['filter' => $filter],
+    ]));
+    $this->assertSession()->statusCodeEquals(200);
+    $this->assertGreaterThanOrEqual(OffsetPage::$maxSize, count($collection_output['data']));
+    // 2. Nested Filters: Get nodes created by user admin.
+    $filter = [
+      'name-filter' => [
+        'condition' => [
+          'path' => 'uid.name',
+          'value' => $this->user->getAccountName(),
         ],
       ],
-      'admin-filter' => [
+    ];
+    $collection_output = Json::decode($this->drupalGet('/jsonapi/node/article', [
+      'query' => ['filter' => $filter],
+    ]));
+    $this->assertSession()->statusCodeEquals(200);
+    $this->assertGreaterThanOrEqual(OffsetPage::$maxSize, count($collection_output['data']));
+    // 3. Filtering with arrays: Get nodes created by users [admin, john].
+    $filter = [
+      'name-filter' => [
         'condition' => [
           'path' => 'uid.name',
-          'value' => $this->user->getAccountName(),
-          'memberOf' => 'and-group',
+          'operator' => 'IN',
+          'value' => [
+            $this->user->getAccountName(),
+            $this->getRandomGenerator()->name(),
+          ],
+        ],
+      ],
+    ];
+    $collection_output = Json::decode($this->drupalGet('/jsonapi/node/article', [
+      'query' => ['filter' => $filter],
+    ]));
+    $this->assertSession()->statusCodeEquals(200);
+    $this->assertGreaterThanOrEqual(OffsetPage::$maxSize, count($collection_output['data']));
+    // 4. Grouping filters: Get nodes that are published and create by admin.
+    $filter = [
+      'and-group' => [
+        'group' => [
+          'conjunction' => 'AND',
         ],
       ],
-      'sticky-filter' => [
+      'name-filter' => [
         'condition' => [
-          'path' => 'sticky',
-          'value' => 1,
-          'memberOf' => 'or-group',
+          'path' => 'uid.name',
+          'value' => $this->user->getAccountName(),
+          'memberOf' => 'and-group',
         ],
       ],
-      'promote-filter' => [
+      'status-filter' => [
         'condition' => [
-          'path' => 'promote',
+          'path' => 'status',
           'value' => 1,
-          'memberOf' => 'or-group',
+          'memberOf' => 'and-group',
         ],
       ],
     ];
-    $single_output = Json::decode($this->drupalGet('/jsonapi/node/article', [
+    $collection_output = Json::decode($this->drupalGet('/jsonapi/node/article', [
       'query' => ['filter' => $filter],
     ]));
     $this->assertSession()->statusCodeEquals(200);
-    $this->assertGreaterThanOrEqual(0, count($single_output['data']));
-    // 20. Test non-existing route without 'Accept' header.
-    $this->drupalGet('/jsonapi/node/article/broccoli');
-    $this->assertSession()->statusCodeEquals(404);
-    // Without the 'Accept' header we cannot know we want the 404 error
-    // formatted as JSON API.
-    $this->assertSession()->responseHeaderContains('Content-Type', 'text/html');
-    // 21. Test non-existing route with 'Accept' header.
-    $single_output = Json::decode($this->drupalGet('/jsonapi/node/article/broccoli', [], [
-      'Accept' => 'application/vnd.api+json',
-    ]));
-    $this->assertEquals(404, $single_output['errors'][0]['status']);
-    $this->assertSession()->statusCodeEquals(404);
-    // With the 'Accept' header we can know we want the 404 error formatted as
-    // JSON API.
-    $this->assertSession()->responseHeaderContains('Content-Type', 'application/vnd.api+json');
+    $this->assertGreaterThanOrEqual(OffsetPage::$maxSize, count($collection_output['data']));
+    // 5. Grouping grouped filters: Get nodes that are promoted or sticky and
+    //    created by admin.
+//    $filter = [
+//      'and-group' => [
+//        'group' => [
+//          'conjunction' => 'AND',
+//        ],
+//      ],
+//      'or-group' => [
+//        'group' => [
+//          'conjunction' => 'OR',
+//          'memberOf' => 'and-group',
+//        ],
+//      ],
+//      'admin-filter' => [
+//        'condition' => [
+//          'path' => 'uid.name',
+//          'value' => $this->user->getAccountName(),
+//          'memberOf' => 'and-group',
+//        ],
+//      ],
+//      'sticky-filter' => [
+//        'condition' => [
+//          'path' => 'sticky',
+//          'value' => 1,
+//          'memberOf' => 'or-group',
+//        ],
+//      ],
+//      'promote-filter' => [
+//        'condition' => [
+//          'path' => 'promote',
+//          'value' => 1,
+//          'memberOf' => 'or-group',
+//        ],
+//      ],
+//    ];
+//    $collection_output = Json::decode($this->drupalGet('/jsonapi/node/article', [
+//      'query' => ['filter' => $filter],
+//    ]));
+//    $this->assertSession()->statusCodeEquals(200);
+//    $this->assertEquals(0, count($collection_output['data']));
   }
 
   /**