feat: rewrite remove function and add remove test

packages/file-graph/fileGraph.js

@@ -1,5 +1,4 @@
 import FileNode from './fileNode.js'
-import { FileNotExistsError } from './errors.js'
 
 export default class FileGraph {
   constructor(root) {
@@ -22,32 +21,7 @@ export default class FileGraph {
     // If the file node doesn't exist, throw an error
 
     files.forEach((file) => {
-      const pathFolders = file.path
-        .split('/')
-        .filter((folder) => folder.length > 0)
-      const fileName = pathFolders.pop()
-      let currentNode = this.root
-
-      for (const folder of pathFolders) {
-        currentNode = currentNode.children.find(
-          (child) => child.name === folder
-        )
-        if (!currentNode) {
-          throw new FileNotExistsError(
-            `File not found: ${fileToFind.path}, ${this.toString()}`
-          )
-        }
-      }
-
-      if (!currentNode.children.some((child) => child.name === fileName)) {
-        throw new FileNotExistsError(
-          `File not found: ${file.path}, ${this.toString()}`
-        )
-      } else {
-        currentNode.children = currentNode.children.filter(
-          (child) => child.name !== fileName
-        )
-      }
+      this.root.removeChild(file)
     })
   }
 
@@ -56,20 +30,13 @@ export default class FileGraph {
     // Overwrite the file graph with the provided files
     // Remove file nodes that don't exist anymore and add new ones
 
-    const newRoot = new FileNode({
-      path: '/',
-      type: 'folder',
-      discovered: true,
-    })
-
     eventFiles.forEach((file) => {
-      newRoot.addChild(file, { makeParents: true })
+      this.root.merge(file)
     })
-
-    this.root = newRoot
   }
 
   handleEvent(event) {
+    // eslint-disable-next-line default-case
     switch (true) {
       case !!event.add:
         this.add(event.add)