diff --git a/package-lock.json b/package-lock.json
index 6fe13e3..bc11f6c 100644
--- a/package-lock.json
+++ b/package-lock.json
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@@ -1858,6 +2054,12 @@
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@@ -3145,6 +3350,12 @@
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       "resolved": "https://registry.npmjs.org/is-extendable/-/is-extendable-0.1.1.tgz",
@@ -3154,7 +3365,8 @@
     "is-extglob": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-2.1.1.tgz",
-      "integrity": "sha1-qIwCU1eR8C7TfHahueqXc8gz+MI="
+      "integrity": "sha1-qIwCU1eR8C7TfHahueqXc8gz+MI=",
+      "dev": true
     },
     "is-fullwidth-code-point": {
       "version": "1.0.0",
@@ -3169,6 +3381,7 @@
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-3.1.0.tgz",
       "integrity": "sha1-e6WuJCF4BKxwcHuWkiVnSGzD6Eo=",
+      "dev": true,
       "requires": {
         "is-extglob": "^2.1.0"
       }
@@ -3497,12 +3710,14 @@
     "js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
-      "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ=="
+      "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==",
+      "dev": true
     },
     "js-yaml": {
       "version": "3.14.0",
       "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.0.tgz",
       "integrity": "sha512-/4IbIeHcD9VMHFqDR/gQ7EdZdLimOvW2DdcxFjdyyZ9NsbS+ccrXqVWDtab/lRl5AlUqmpBx8EhPaWR+OtY17A==",
+      "dev": true,
       "requires": {
         "argparse": "^1.0.7",
         "esprima": "^4.0.0"
@@ -3832,6 +4047,7 @@
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/matcher-collection/-/matcher-collection-1.1.2.tgz",
       "integrity": "sha512-YQ/teqaOIIfUHedRam08PB3NK7Mjct6BvzRnJmpGDm8uFXpNr1sbY4yuflI5JcEs6COpYA0FpRQhSDBf1tT95g==",
+      "dev": true,
       "requires": {
         "minimatch": "^3.0.2"
       }
@@ -3880,7 +4096,8 @@
     "minimist": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-      "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
+      "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
+      "dev": true
     },
     "mixin-deep": {
       "version": "1.3.2",
@@ -3907,6 +4124,7 @@
       "version": "0.5.5",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
       "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
+      "dev": true,
       "requires": {
         "minimist": "^1.2.5"
       }
@@ -4381,7 +4599,8 @@
     "normalize-path": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
-      "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA=="
+      "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==",
+      "dev": true
     },
     "normalize-url": {
       "version": "4.5.0",
@@ -4853,6 +5072,7 @@
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/parse-gitignore/-/parse-gitignore-0.4.0.tgz",
       "integrity": "sha1-q/cC5LkAUk//eQK2g4YoV7Y/k/4=",
+      "dev": true,
       "requires": {
         "array-unique": "^0.3.2",
         "is-glob": "^3.1.0"
@@ -4905,7 +5125,8 @@
     "path-parse": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
-      "integrity": "sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw=="
+      "integrity": "sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==",
+      "dev": true
     },
     "path-root": {
       "version": "0.1.1",
@@ -4954,7 +5175,8 @@
     "picomatch": {
       "version": "2.2.2",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.2.2.tgz",
-      "integrity": "sha512-q0M/9eZHzmr0AulXyPwNfZjtwZ/RBZlbN3K3CErVrk50T2ASYI7Bye0EvekFY3IP1Nt2DHu0re+V2ZHIpMkuWg=="
+      "integrity": "sha512-q0M/9eZHzmr0AulXyPwNfZjtwZ/RBZlbN3K3CErVrk50T2ASYI7Bye0EvekFY3IP1Nt2DHu0re+V2ZHIpMkuWg==",
+      "dev": true
     },
     "pify": {
       "version": "3.0.0",
@@ -5307,6 +5529,7 @@
       "version": "1.17.0",
       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.17.0.tgz",
       "integrity": "sha512-ic+7JYiV8Vi2yzQGFWOkiZD5Z9z7O2Zhm9XMaTxdJExKasieFCr+yXZ/WmXsckHiKl12ar0y6XiXDx3m4RHn1w==",
+      "dev": true,
       "requires": {
         "path-parse": "^1.0.6"
       }
@@ -5915,6 +6138,7 @@
       "version": "5.5.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
       "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
       "requires": {
         "has-flag": "^3.0.0"
       }
@@ -6081,12 +6305,14 @@
     "tslib": {
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
-      "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg=="
+      "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==",
+      "dev": true
     },
     "tslint": {
       "version": "6.1.3",
       "resolved": "https://registry.npmjs.org/tslint/-/tslint-6.1.3.tgz",
       "integrity": "sha512-IbR4nkT96EQOvKE2PW/djGz8iGNeJ4rF2mBfiYaR/nvUWYKJhLwimoJKgjIFEIDibBtOevj7BqCRL4oHeWWUCg==",
+      "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
         "builtin-modules": "^1.1.1",
@@ -6106,12 +6332,14 @@
         "commander": {
           "version": "2.20.3",
           "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
-          "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ=="
+          "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
+          "dev": true
         },
         "semver": {
           "version": "5.7.1",
           "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
-          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ=="
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
         }
       }
     },
@@ -6119,6 +6347,7 @@
       "version": "2.29.0",
       "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-2.29.0.tgz",
       "integrity": "sha512-g5JVHCIJwzfISaXpXE1qvNalca5Jwob6FjI4AoPlqMusJ6ftFE7IkkFoMhVLRgK+4Kx3gkzb8UZK5t5yTTvEmA==",
+      "dev": true,
       "requires": {
         "tslib": "^1.8.1"
       }
@@ -6167,7 +6396,8 @@
     "typescript": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.3.tgz",
-      "integrity": "sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg=="
+      "integrity": "sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg==",
+      "dev": true
     },
     "unc-path-regex": {
       "version": "0.1.2",
@@ -6411,6 +6641,7 @@
       "version": "0.3.4",
       "resolved": "https://registry.npmjs.org/walk-sync/-/walk-sync-0.3.4.tgz",
       "integrity": "sha512-ttGcuHA/OBnN2pcM6johpYlEms7XpO5/fyKIr48541xXedan4roO8cS1Q2S/zbbjGH/BarYDAMeS2Mi9HE5Tig==",
+      "dev": true,
       "requires": {
         "ensure-posix-path": "^1.0.0",
         "matcher-collection": "^1.0.0"
diff --git a/package.json b/package.json
index 76b8e40..3f1455d 100644
--- a/package.json
+++ b/package.json
@@ -39,8 +39,8 @@
   },
   "devDependencies": {
     "@types/jquery": "^3.5.1",
-    "@types/mocha": "^8.0.3",
     "@types/chai": "^4.2.14",
+    "@types/mocha": "^8.0.3",
     "typescript": "^4.0.3",
     "tslint": "^6.1.3",
     "devtron": "^1.4.0",
@@ -53,7 +53,7 @@
     "gulp-exec": "^5.0.0",
     "del": "^6.0.0",
     "chai": "^4.2.0",
-    "mocha": "^8.2.0",
+    "electron-mocha": "^9.3.1",
     "nyc": "^15.1.0",
     "ts-node": "^9.0.0",
     "check-for-leaks": "^1.2.1"
diff --git a/src/assets/documents/ZSort.Test.txt b/src/assets/documents/ZSort.Test.txt
new file mode 100644
index 0000000..ff15cec
--- /dev/null
+++ b/src/assets/documents/ZSort.Test.txt
@@ -0,0 +1 @@
+content!
\ No newline at end of file
diff --git a/src/ts_source/fileutils.ts b/src/ts_source/fileutils.ts
index b65b7a2..201cbe4 100644
--- a/src/ts_source/fileutils.ts
+++ b/src/ts_source/fileutils.ts
@@ -1,7 +1,9 @@
 let path = require('path')
 
 let fs = require('fs');
-let shell = require('electron').shell;
+
+const shell = require('electron').shell;
+
 let fileExtensionToImage: object;
 
 export class Configurator {
@@ -96,6 +98,7 @@ export class DocumentDirectory {
 }
 
 export class FileNode {
+
     filePath: string;
     parent: FileNode;
 
@@ -105,7 +108,11 @@ export class FileNode {
     }
 
     open() {
-        shell.open(this.filePath);
+        shell.openItem(this.filePath);
+    }
+
+    static compare(a: FileNode, b: FileNode): number {
+        return a.filePath.localeCompare(b.filePath);
     }
 }
 
@@ -135,8 +142,20 @@ export class DirectoryNode extends FileNode {
         }
     }
 
+    getDocuments(): DocumentNode[] {
+        return this.children.filter((x) => {
+            return x instanceof DocumentNode
+        }) as DocumentNode[]
+    }
+
+    getDirectories(): DirectoryNode[] {
+        return this.children.filter((x) => {
+            return x instanceof DirectoryNode
+        }) as DirectoryNode[]
+    }
 }
 
+
 export class DocumentNode extends FileNode {
     constructor(filePath: string, parent: FileNode) {
         super(filePath, parent);
diff --git a/tests/fileutils-test.ts b/tests/fileutils-test.ts
index 04bcfa2..f67dd3b 100644
--- a/tests/fileutils-test.ts
+++ b/tests/fileutils-test.ts
@@ -1,4 +1,6 @@
-import {DirectoryIsActuallyFileError, DocumentDirectory} from "../src/ts_source/fileutils";
+import {DocumentDirectory, FileNode} from "../src/ts_source/fileutils";
+
+const shell = require('electron').shell;
 
 const path = require('path');
 const chai = require('chai');
@@ -26,5 +28,7 @@ function testDocumentDirectoryFailFile() {
 function testDocumentDirectoryConstructor() {
     let directoryPath = path.join(__dirname, "../src/assets/documents");
     let documents = new DocumentDirectory(directoryPath);
-    let firstChild = documents.root.children[0];
-}
\ No newline at end of file
+    console.log(documents);
+    console.log((documents.root.getDirectories()[0].children));
+
+}