tenthe opened a new issue, #2886:
URL: https://github.com/apache/streampipes/issues/2886
### Body
If a user deletes a nested property and its parent, it can cause a null
pointer exception.
I already provided a test case, see below.
## Extend the test code
- **File:** deleteTransformationRule.spec.ts
- **Test:** Test delete nested properties
- **Add the following code to the bottom of the test:**
```
ConnectBtns.refreshSchema().click();
// Test to delete the parent property
ConnectEventSchemaUtils.deleteProperty('parent');
cy.dataCy('schema-preview-result-event')
.should(
'have.text',
'{"timestamp":\u00A01667904471000}',
);
```
## Problem Details
- The problem occurs in the `DeleteTransformationRule.applyTransformation`
- The value event is null
- Another problem is in the `SupportsNestedTransformationRule.applyNested`
- A copy of the child object is added to the event in line 45, but the
child could also be null
### StreamPipes Committer
I acknowledge that I am a maintainer/committer of the Apache StreamPipes
project.
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