TASK: Add failing test for #5150

The test scenario consists of a document with a main content collection
that initially contains two simple text content nodes.

During the scenario, we switch to a user workspace and insert a third
text node between the two initial nodes. The test then verifies, that
fusion renders all three text nodes in order.

Afterwards we discard the change we just made and check whether fusion
now stops rendering the discarded node. Confirming #5150, with this
commit, said verification fails.

Neos.Neos/Tests/Behavior/Features/ContentCache/NodesInUserWorkspace.feature

@@ -0,0 +1,140 @@
+@flowEntities
+Feature: Tests for the ContentCacheFlusher and cache flushing when applied in user workspaces
+
+  Background:
+    Given using no content dimensions
+    And using the following node types:
+    """yaml
+    'Neos.ContentRepository:Root': {}
+    'Neos.Neos:Sites':
+      superTypes:
+        'Neos.ContentRepository:Root': true
+    'Neos.Neos:Document':
+      properties:
+        title:
+          type: string
+        uriPathSegment:
+          type: string
+    'Neos.Neos:ContentCollection':
+      constraints:
+        nodeTypes:
+          'Neos.Neos:Document': false
+          '*': true
+    'Neos.Neos:Content':
+      constraints:
+        nodeTypes:
+          '*': false
+    'Neos.Neos:Site':
+      superTypes:
+        'Neos.Neos:Document': true
+    'Neos.Neos:Test.DocumentTypeWithMainCollection':
+      superTypes:
+        'Neos.Neos:Document': true
+      childNodes:
+        main:
+          type: 'Neos.Neos:ContentCollection'
+    'Neos.Neos:Test.TextNode':
+      superTypes:
+        'Neos.Neos:Content': true
+      properties:
+        text:
+          type: string
+    """
+    And using identifier "default", I define a content repository
+    And I am in content repository "default"
+    And I am user identified by "editor"
+
+    When the command CreateRootWorkspace is executed with payload:
+      | Key                | Value           |
+      | workspaceName      | "live"          |
+      | newContentStreamId | "cs-identifier" |
+    And the command CreateWorkspace is executed with payload:
+      | Key                | Value                       |
+      | workspaceName      | "user-editor"               |
+      | baseWorkspaceName  | "live"                      |
+      | newContentStreamId | "user-editor-cs-identifier" |
+    And I am in workspace "live" and dimension space point {}
+    And the command CreateRootNodeAggregateWithNode is executed with payload:
+      | Key             | Value             |
+      | nodeAggregateId | "root"            |
+      | nodeTypeName    | "Neos.Neos:Sites" |
+    And the following CreateNodeAggregateWithNode commands are executed:
+      | nodeAggregateId             | parentNodeAggregateId             | nodeTypeName                                  | initialPropertyValues                                                                     | nodeName                    | tetheredDescendantNodeAggregateIds            |
+      | site                        | root                              | Neos.Neos:Site                                | {}                                                                                        | site                        | {}                                            |
+      | test-document-with-contents | site                              | Neos.Neos:Test.DocumentTypeWithMainCollection | {"uriPathSegment": "test-document-with-contents", "title": "Test document with contents"} | test-document-with-contents | {"main": "test-document-with-contents--main"} |
+      | text-node-start             | test-document-with-contents--main | Neos.Neos:Test.TextNode                       | {"text": "Text Node at the start of the document"}                                        | text-node-start             | {}                                            |
+      | text-node-end               | test-document-with-contents--main | Neos.Neos:Test.TextNode                       | {"text": "Text Node at the end of the document"}                                          | text-node-end               | {}                                            |
+    When the command RebaseWorkspace is executed with payload:
+      | Key           | Value         |
+      | workspaceName | "user-editor" |
+    And A site exists for node name "site" and domain "http://localhost"
+    And the sites configuration is:
+    """yaml
+    Neos:
+      Neos:
+        sites:
+          '*':
+            contentRepository: default
+            contentDimensions:
+              resolver:
+                factoryClassName: Neos\Neos\FrontendRouting\DimensionResolution\Resolver\NoopResolverFactory
+    """
+    And the Fusion context node is "site"
+    And the Fusion context request URI is "http://localhost"
+    And I have the following Fusion setup:
+    """fusion
+    include: resource://Neos.Fusion/Private/Fusion/Root.fusion
+    include: resource://Neos.Neos/Private/Fusion/Root.fusion
+
+    prototype(Neos.Neos:Test.TextNode) < prototype(Neos.Neos:ContentComponent) {
+      renderer = ${"[" + q(node).property("text") + "]"}
+    }
+    """
+
+  Scenario: ContentCache gets flushed when a node that was just created gets discarded
+    Given I have Fusion content cache enabled
+    And I am in workspace "user-editor" and dimension space point {}
+    And the Fusion context node is "test-document-with-contents"
+    And I execute the following Fusion code:
+    """fusion
+    test = Neos.Neos:ContentCollection {
+      nodePath = "main"
+    }
+    """
+    Then I expect the following Fusion rendering result:
+    """
+    <div class="neos-contentcollection">[Text Node at the start of the document][Text Node at the end of the document]</div>
+    """
+
+    When the command CreateNodeAggregateWithNode is executed with payload:
+      | Key                               | Value                                               |
+      | nodeAggregateId                   | "text-node-middle"                                  |
+      | nodeTypeName                      | "Neos.Neos:Test.TextNode"                           |
+      | parentNodeAggregateId             | "test-document-with-contents--main"                 |
+      | initialPropertyValues             | {"text": "Text Node in the middle of the document"} |
+      | succeedingSiblingNodeAggregateId  | "text-node-end"                                     |
+      | nodeName                          | "text-node-middle"                                  |
+    And I execute the following Fusion code:
+    """fusion
+    test = Neos.Neos:ContentCollection {
+      nodePath = "main"
+    }
+    """
+    Then I expect the following Fusion rendering result:
+    """
+    <div class="neos-contentcollection">[Text Node at the start of the document][Text Node in the middle of the document][Text Node at the end of the document]</div>
+    """
+
+    When the command DiscardWorkspace is executed with payload:
+      | Key           | Value         |
+      | workspaceName | "user-editor" |
+    And I execute the following Fusion code:
+    """fusion
+    test = Neos.Neos:ContentCollection {
+      nodePath = "main"
+    }
+    """
+    Then I expect the following Fusion rendering result:
+    """
+    <div class="neos-contentcollection">[Text Node at the start of the document][Text Node at the end of the document]</div>
+    """