Revert "Revert "clear rootDoc_id when deleting doc, reset on compiles if invalid""

This reverts commit 7acba5876581044a08d6deb4767a4a2196dcb765.

GitOrigin-RevId: 034ae6fa4d8515944683395ef14d99801829cb6a

services/web/test/acceptance/src/ProjectStructureTests.js

@@ -6,6 +6,7 @@ const fs = require('fs')
 const Settings = require('settings-sharelatex')
 const _ = require('underscore')
 
+const { Project } = require('../../../app/src/models/Project')
 const ProjectGetter = require('../../../app/src/Features/Project/ProjectGetter.js')
 
 const MockDocUpdaterApi = require('./helpers/MockDocUpdaterApi')
@@ -1098,6 +1099,68 @@ describe('ProjectStructureChanges', function() {
     })
   })
 
+  describe('deleting docs', function() {
+    beforeEach(function(done) {
+      createExampleProject(this, () => {
+        createExampleFolder(this, () => {
+          createExampleDoc(this, () => {
+            MockDocUpdaterApi.clearProjectStructureUpdates()
+            ProjectGetter.getProject(
+              this.exampleProjectId,
+              (error, project) => {
+                if (error) {
+                  throw error
+                }
+                this.project0 = project
+                done()
+            })
+          })
+        })
+      })
+    })
+
+    describe('when rootDoc_id matches doc being deleted', () => {
+      beforeEach(function(done) {
+        Project.update({_id: this.exampleProjectId}, {$set: {rootDoc_id: this.exampleDocId}}, done)
+      })
+
+      it('should clear rootDoc_id', function(done) {
+        deleteItem(this, 'doc', this.exampleDocId, () => {
+          ProjectGetter.getProject(
+            this.exampleProjectId,
+            (error, project) => {
+              if (error) {
+                throw error
+              }
+              expect(project.rootDoc_id).to.be.undefined
+              done()
+          })
+        })
+      })
+    })
+
+    describe('when rootDoc_id does not match doc being deleted', () => {
+      beforeEach(function(done) {
+        this.exampleRootDocId = new ObjectId()
+        Project.update({_id: this.exampleProjectId}, {$set: {rootDoc_id: this.exampleRootDocId}}, done)
+      })
+
+      it('should not clear rootDoc_id', function(done) {
+        deleteItem(this, 'doc', this.exampleDocId, () => {
+          ProjectGetter.getProject(
+            this.exampleProjectId,
+            (error, project) => {
+              if (error) {
+                throw error
+              }
+              expect(project.rootDoc_id.toString()).to.equal(this.exampleRootDocId.toString())
+              done()
+          })
+        })
+      })
+    })
+  })
+
   describe('tpds', function() {
     let projectName, exampleProjectId, oldVersion, rootFolderId