fix: Set origin when Contained Resource is Removed

Notification emitted on the container when a resource in it is removed, sets the `origin` property to the location of the removed resource, consistent with the requirements of `as:Remove`.

Author: CxRes

lib/handlers/notify.js

@@ -99,13 +99,15 @@ function handler (req, res, next) {
           negotiatedFields
         ) {
           const mediaType = negotiatedFields['content-type']
+          const activity = getParentActivity(method, statusCode)
+          const target = activity !== 'Update' ? String(fullUrl) : undefined
           if (ALLOWED_RDF_MIME_TYPES.includes(mediaType?.[0])) {
             return `${headerTemplate(negotiatedFields)}\r\n${solidRDFTemplate({
-              activity: getParentActivity(method, statusCode),
+              activity,
               eventID: parentID,
               date: eventDate,
               object: String(parentUrl),
-              target: statusCode === 201 ? String(fullUrl) : undefined,
+              target,
               eTag: undefined,
               mediaType
             })}`

test/integration/prep-test.js

@@ -126,6 +126,7 @@ solid:inserts { <u> <v> <z>. }.`
           expect(notification).to.haveOwnProperty('published')
           expect(notification.type).to.equal('Remove')
           expect(notification.object).to.match(/sampleContainer\/$/)
+          expect(notification.origin).to.match(/sampleContainer\/.*example-prep.ttl$/)
         })
 
       it('when resource is created by POST',