TASK: Add failing test for neos#5150, considering "Discard individual…

… nodes"

Discarding individual nodes works through a separate command that still
needs to be considered by the recently introduced cache invalidation
mechanism in `WorkspaceProjectorCatchUpHookForCacheFlushing`.

This commit introduces a test that illustrates the issue.

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

@@ -91,7 +91,7 @@ Feature: Tests for the ContentCacheFlusher and cache flushing when applied in us
     }
     """
 
-  Scenario: ContentCache gets flushed when a node that was just created gets discarded
+  Scenario: ContentCache gets flushed when a node that was just created gets discarded via "Discard All"
     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"
@@ -141,3 +141,56 @@ Feature: Tests for the ContentCacheFlusher and cache flushing when applied in us
     """
     <div class="neos-contentcollection">[Text Node at the start of the document][Text Node at the end of the document]</div>
     """
+
+  Scenario: ContentCache gets flushed when a node that was just created gets discarded via "Discard Individual Nodes"
+    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 DiscardIndividualNodesFromWorkspace is executed with payload:
+      | Key                | Value                                                                |
+      | workspaceName      | "user-editor"                                                        |
+      | nodesToDiscard     | [{"nodeAggregateId": "text-node-middle", "dimensionSpacePoint": {}}] |
+      | newContentStreamId | "cs-identifier-modified"                                             |
+    And I am in workspace "user-editor" and dimension space point {}
+    Then I expect node aggregate identifier "text-node-middle" to lead to no node
+
+    When 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>
+    """