diff --git a/package-lock.json b/package-lock.json
index 715ab7f..05b63fb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -29,11 +29,182 @@
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@@ -299,6 +521,73 @@
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@@ -356,6 +645,12 @@
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@@ -629,6 +930,12 @@
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+      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
+      "dev": true
+    },
     "type-fest": {
       "version": "0.8.1",
       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.8.1.tgz",
@@ -4263,6 +6561,15 @@
         "mime-types": "~2.1.24"
       }
     },
+    "typedarray-to-buffer": {
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
+      "integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
+      "dev": true,
+      "requires": {
+        "is-typedarray": "^1.0.0"
+      }
+    },
     "typescript": {
       "version": "4.0.5",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.0.5.tgz",
@@ -4409,16 +6716,77 @@
       "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
       "integrity": "sha1-YU9/v42AHwu18GYfWy9XhXUOTwk="
     },
+    "w3c-hr-time": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.2.tgz",
+      "integrity": "sha512-z8P5DvDNjKDoFIHK7q8r8lackT6l+jo/Ye3HOle7l9nICP9lf1Ci25fy9vHd0JOWewkIFzXIEig3TdKT7JQ5fQ==",
+      "dev": true,
+      "requires": {
+        "browser-process-hrtime": "^1.0.0"
+      }
+    },
+    "w3c-xmlserializer": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-2.0.0.tgz",
+      "integrity": "sha512-4tzD0mF8iSiMiNs30BiLO3EpfGLZUT2MSX/G+o7ZywDzliWQ3OPtTZ0PTC3B3ca1UAf4cJMHB+2Bf56EriJuRA==",
+      "dev": true,
+      "requires": {
+        "xml-name-validator": "^3.0.0"
+      }
+    },
     "web-animations-js": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/web-animations-js/-/web-animations-js-2.3.2.tgz",
       "integrity": "sha512-TOMFWtQdxzjWp8qx4DAraTWTsdhxVSiWa6NkPFSaPtZ1diKUxTn4yTix73A1euG1WbSOMMPcY51cnjTIHrGtDA=="
     },
+    "webidl-conversions": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
+      "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==",
+      "dev": true
+    },
+    "whatwg-encoding": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",
+      "integrity": "sha512-b5lim54JOPN9HtzvK9HFXvBma/rnfFeqsic0hSpjtDbVxR3dJKLc+KB4V6GgiGOvl7CY/KNh8rxSo9DKQrnUEw==",
+      "dev": true,
+      "requires": {
+        "iconv-lite": "0.4.24"
+      },
+      "dependencies": {
+        "iconv-lite": {
+          "version": "0.4.24",
+          "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
+          "integrity": "sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==",
+          "dev": true,
+          "requires": {
+            "safer-buffer": ">= 2.1.2 < 3"
+          }
+        }
+      }
+    },
     "whatwg-fetch": {
       "version": "3.5.0",
       "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.5.0.tgz",
       "integrity": "sha512-jXkLtsR42xhXg7akoDKvKWE40eJeI+2KZqcp2h3NsOrRnDvtWX36KcKl30dy+hxECivdk2BVUHVNrPtoMBUx6A=="
     },
+    "whatwg-mimetype": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-2.3.0.tgz",
+      "integrity": "sha512-M4yMwr6mAnQz76TbJm914+gPpB/nCwvZbJU28cUD6dR004SAxDLOOSUaB1JDRqLtaOV/vi0IC5lEAGFgrjGv/g==",
+      "dev": true
+    },
+    "whatwg-url": {
+      "version": "6.5.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-6.5.0.tgz",
+      "integrity": "sha512-rhRZRqx/TLJQWUpQ6bmrt2UV4f0HCQ463yQuONJqC6fO2VoEb1pTYddbe59SkYq87aoM5A3bdhMZiUiVws+fzQ==",
+      "dev": true,
+      "requires": {
+        "lodash.sortby": "^4.7.0",
+        "tr46": "^1.0.1",
+        "webidl-conversions": "^4.0.2"
+      }
+    },
     "which": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
@@ -4509,6 +6877,12 @@
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
       "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8="
     },
+    "workerpool": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.0.2.tgz",
+      "integrity": "sha512-DSNyvOpFKrNusaaUwk+ej6cBj1bmhLcBfj80elGk+ZIo5JSkq+unB1dLKEOcNfJDZgjGICfhQ0Q5TbP0PvF4+Q==",
+      "dev": true
+    },
     "wrap-ansi": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-5.1.0.tgz",
@@ -4571,6 +6945,36 @@
         "mkdirp": "^0.5.1"
       }
     },
+    "write-file-atomic": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
+      "integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
+      "dev": true,
+      "requires": {
+        "imurmurhash": "^0.1.4",
+        "is-typedarray": "^1.0.0",
+        "signal-exit": "^3.0.2",
+        "typedarray-to-buffer": "^3.1.5"
+      }
+    },
+    "ws": {
+      "version": "7.4.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.0.tgz",
+      "integrity": "sha512-kyFwXuV/5ymf+IXhS6f0+eAFvydbaBW3zjpT6hUdAh/hbVjTIB5EHBGi0bPoCLSK2wcuz3BrEkB9LrYv1Nm4NQ==",
+      "dev": true
+    },
+    "xml-name-validator": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
+      "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw==",
+      "dev": true
+    },
+    "xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==",
+      "dev": true
+    },
     "y18n": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
@@ -4656,6 +7060,38 @@
           "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg=="
         }
       }
+    },
+    "yargs-unparser": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-2.0.0.tgz",
+      "integrity": "sha512-7pRTIA9Qc1caZ0bZ6RYRGbHJthJWuakf+WmHK0rVeLkNrrGhfoabBNdue6kdINI6r4if7ocq9aD/n7xwKOdzOA==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^6.0.0",
+        "decamelize": "^4.0.0",
+        "flat": "^5.0.2",
+        "is-plain-obj": "^2.1.0"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "6.2.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-6.2.0.tgz",
+          "integrity": "sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg==",
+          "dev": true
+        },
+        "decamelize": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-4.0.0.tgz",
+          "integrity": "sha512-9iE1PgSik9HeIIw2JO94IidnE3eBoQrFJ3w7sFuzSX4DpmZ3v5sZpUiV5Swcf6mQEF+Y0ru8Neo+p+nyh2J+hQ==",
+          "dev": true
+        }
+      }
+    },
+    "yn": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+      "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
+      "dev": true
     }
   }
 }
diff --git a/package.json b/package.json
index 429fd35..f44eb60 100644
--- a/package.json
+++ b/package.json
@@ -8,11 +8,14 @@
     "debug-client": "tsc-watch --project ./public/js-source",
     "debug-server": "tsc-watch --project . --onSuccess \"node --enable-source-maps --use-openssl-ca --unhandled-rejections=strict ./out/index\"",
     "debug": "concurrently npm:debug-*",
+    "test": "nyc mocha -r ts-node/register ./public/js-source/test/**/*.ts",
     "build": "tsc",
     "production": "node --use-openssl-ca --unhandled-rejections=strict ./out/index",
     "install-debug": "npm install && npm run build",
-    "install-prod": "npm install --only=dev && npm install --only=prod && npm run build && rm -r node_modules && npm install --only=prod",
-    "install-prod-win": "npm install --only=dev && npm install --only=prod && npm run build && rmdir /Q/S node_modules && npm install --only=prod"
+    "install-prod": "npm install --only=dev && npm install --only=prod && npm run build && npm run del-node-module && npm install --only=prod",
+    "del-node-module:default": "rm -r node_modules",
+    "del-node-module:windows": "if exist node_modules rmdir /Q/S node_modules",
+    "del-node-module": "run-script-os"
   },
   "dependencies": {
     "compression": "^1.7.4",
@@ -25,18 +28,27 @@
     "role-acl": "^4.5.4"
   },
   "devDependencies": {
+    "@types/chai": "^4.2.14",
     "@types/compression": "^1.7.0",
     "@types/express": "^4.17.8",
     "@types/http-errors": "^1.8.0",
+    "@types/mocha": "^8.0.4",
     "@types/node": "^14.14.7",
     "@types/node-sass-middleware": "0.0.31",
     "@typescript-eslint/eslint-plugin": "^4.7.0",
     "@typescript-eslint/parser": "^4.7.0",
+    "chai": "^4.2.0",
     "concurrently": "^5.3.0",
     "eslint": "^7.13.0",
     "eslint-plugin-no-null": "^1.0.2",
     "eslint-plugin-promise": "^4.2.1",
+    "fetch-mock": "^9.10.7",
+    "jsdom": "^16.4.0",
+    "mocha": "^8.2.1",
     "node-watch": "^0.7.0",
+    "nyc": "^15.1.0",
+    "rewire": "^5.0.0",
+    "ts-node": "^9.0.0",
     "tsc-watch": "^4.2.9",
     "typescript": "^4.0.5"
   }
diff --git a/public/js-source/SomeModule.ts b/public/js-source/src/SomeModule.ts
similarity index 100%
rename from public/js-source/SomeModule.ts
rename to public/js-source/src/SomeModule.ts
diff --git a/public/js-source/index.ts b/public/js-source/src/index.ts
similarity index 80%
rename from public/js-source/index.ts
rename to public/js-source/src/index.ts
index 6090cd0..79bd6c9 100644
--- a/public/js-source/index.ts
+++ b/public/js-source/src/index.ts
@@ -3,8 +3,10 @@ export {setConfig} from './utils/utils';
 
 import {getUserName} from './SomeModule';
 
-getUserName().then((name) => {
+function updateUserName(name: string): void {
 	const node = document.createElement('span');
 	node.innerText = `This user name is fetched with Javascript: ${name}`;
 	document.getElementsByTagName("body")[0].appendChild(node);
-});
+}
+
+getUserName().then(updateUserName);
diff --git a/public/js-source/utils/resolvable.ts b/public/js-source/src/utils/resolvable.ts
similarity index 71%
rename from public/js-source/utils/resolvable.ts
rename to public/js-source/src/utils/resolvable.ts
index 7e9b714..d9640ff 100644
--- a/public/js-source/utils/resolvable.ts
+++ b/public/js-source/src/utils/resolvable.ts
@@ -5,21 +5,27 @@ enum ResolvableState {
 	DONE
 }
 
-class FetchOnce<T> {
+class FetchOnce<T, U extends Array<unknown>> {
 	protected data: T|undefined;
 	protected error: unknown|undefined;
 	protected state: ResolvableState = ResolvableState.WAITING;
 	protected pendings: [(res: Promise<T>|T) => void, (reason: unknown) => void][] = [];
 
-	constructor(protected fetchMethod?: () => Promise<T>) {  }
+	constructor(protected fetchMethod?: (...args: U) => Promise<T>) {  }
 
-	public resolve(): Promise<T> {
+	public reset(): void {
+		this.data = undefined;
+		this.error = undefined;
+		this.state = ResolvableState.WAITING;
+	}
+
+	public resolve(...args: U): Promise<T> {
 		return new Promise((resolve, reject) => {
 			switch (this.state) {
 				case ResolvableState.WAITING:
 					this.state = ResolvableState.PENDING;
 					this.pendings.push([resolve, reject]);
-					if (this.fetchMethod) this.parsePromise(this.fetchMethod());
+					if (this.fetchMethod) this.parsePromise(this.fetchMethod(...args));
 					break;
 				case ResolvableState.PENDING:
 					this.pendings.push([resolve, reject]);
@@ -51,13 +57,13 @@ class FetchOnce<T> {
 	}
 }
 
-export class Resolvable<T> extends FetchOnce<T> {
-	constructor(fetchMethod: () => Promise<T>) {
+export class Resolvable<T, U extends Array<unknown>> extends FetchOnce<T, U> {
+	constructor(fetchMethod: (...args: U) => Promise<T>) {
 		super(fetchMethod);
 	}
 }
 
-export class WaitForSync<T> extends FetchOnce<T> {
+export class WaitForSync<T> extends FetchOnce<T, never> {
 	protected state: ResolvableState = ResolvableState.PENDING;
 
 	constructor() {
@@ -75,4 +81,9 @@ export class WaitForSync<T> extends FetchOnce<T> {
 			this.parsePromise((async () => { throw error; })());
 		}
 	}
+
+	public reset(): void {
+		super.reset();
+		this.state = ResolvableState.PENDING;
+	}
 }
diff --git a/public/js-source/utils/utils.ts b/public/js-source/src/utils/utils.ts
similarity index 60%
rename from public/js-source/utils/utils.ts
rename to public/js-source/src/utils/utils.ts
index 3ec5ed0..28ac479 100644
--- a/public/js-source/utils/utils.ts
+++ b/public/js-source/src/utils/utils.ts
@@ -16,8 +16,23 @@ export function getConfig(): Promise<ClientConfig> {
 	return configWaiter.resolve();
 }
 
-export async function getUserInfo(): Promise<UserInfo|undefined> {
+export function resetConfig(): void {
+	return configWaiter.reset();
+}
+
+export async function getUserInfo(): Promise<Partial<UserInfo>|undefined> {
 	const config = await getConfig();
 	const res = await fetch(config.EXTERNAL_BASE_URL + "/api/user");
 	return res.json();
 }
+
+export type UserInfo = {
+	email: string,
+	email_verified: boolean,
+	family_name: string,
+	given_name: string,
+	groups: string[],
+	name: string,
+	preferred_username: string,
+	sub: string,
+};
diff --git a/public/js-source/test/SomeModule.ts b/public/js-source/test/SomeModule.ts
new file mode 100644
index 0000000..39ca108
--- /dev/null
+++ b/public/js-source/test/SomeModule.ts
@@ -0,0 +1,57 @@
+import {describe, it} from 'mocha';
+import {expect} from 'chai';
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore
+import * as fetchMock from 'fetch-mock';
+import {getUserName} from '../src/SomeModule';
+import {setConfig, UserInfo} from '../src/utils/utils';
+
+describe('frontend:SomeModule', () => {
+	const CONFIG = {EXTERNAL_BASE_URL: "http://demo.url"};
+	before(() => {
+		setConfig(CONFIG);
+		fetchMock.config.overwriteRoutes = true;
+	});
+	it('should return username', async () => {
+		const tests: [Partial<UserInfo>, string][] = [
+			[
+				{name: "John Doe"},
+				"John Doe",
+			], [
+				{name: "John Doe", email: "some.mail@example.com"},
+				"John Doe",
+			], [
+				{name: "", email: "some.mail@example.com"},
+				"",
+			],
+		];
+		for (const [USER_INFO, RESULT] of tests) {
+			fetchMock.mock('http://demo.url/api/user', {
+				status: 200,
+				body: JSON.stringify(USER_INFO),
+			});
+			const name = await getUserName();
+			expect(name).to.deep.equal(RESULT);
+		}
+	});
+	it('should return default string', async () => {
+		const RESULT = "No name found!";
+		const tests: (Partial<UserInfo>|unknown)[] = [
+			// eslint-disable-next-line no-null/no-null
+			{name: null},
+			// eslint-disable-next-line no-null/no-null
+			null,
+			{email: "some.mail@example.com"},
+			{name: undefined},
+			{},
+		];
+		for (const USER_INFO of tests) {
+			fetchMock.mock('http://demo.url/api/user', {
+				status: 200,
+				body: JSON.stringify(USER_INFO),
+			});
+			const name = await getUserName();
+			expect(name).to.deep.equal(RESULT);
+		}
+	});
+});
diff --git a/public/js-source/test/index.ts b/public/js-source/test/index.ts
new file mode 100644
index 0000000..b0628ab
--- /dev/null
+++ b/public/js-source/test/index.ts
@@ -0,0 +1,43 @@
+import {describe, it} from 'mocha';
+import {expect} from 'chai';
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore
+import {JSDOM} from 'jsdom';
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore
+import * as rewire from 'rewire';
+
+describe("frontend:index", () => {
+	const updateUserName = rewire("../src/index").__get__("updateUserName") as (name: string) => void;
+
+	beforeEach(() => {
+		const dom = new JSDOM(
+			`
+			<html>
+        <body>
+        </body>
+      </html>
+			`,
+			{url: 'http://localhost'},
+		);
+
+		// noinspection JSConstantReassignment
+		global.window = dom.window;
+		// noinspection JSConstantReassignment
+		global.document = dom.window.document;
+	});
+
+	it("updateUserName", (done) => {
+		const NAME = "Patrick Star";
+		const RESULT = "This user name is fetched with Javascript: Patrick Star";
+		updateUserName(NAME);
+		// give the browser a chance to update the DOM
+		setTimeout(() => {
+			const span = document.getElementsByTagName("span");
+			expect(span).to.not.be.null;
+			expect(span.length).to.be.greaterThan(0);
+			expect(span[0].innerText).to.deep.equal(RESULT);
+			done();
+		}, 5);
+	});
+});
diff --git a/public/js-source/test/utils.ts b/public/js-source/test/utils.ts
new file mode 100644
index 0000000..cc522c2
--- /dev/null
+++ b/public/js-source/test/utils.ts
@@ -0,0 +1,123 @@
+import {setConfig, getConfig, resetConfig, getUserInfo, UserInfo} from '../src/utils/utils';
+import {Resolvable, WaitForSync} from '../src/utils/resolvable';
+import {describe, it} from 'mocha';
+import {expect} from 'chai';
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore
+import * as fetchMock from 'fetch-mock';
+
+describe('frontend:utils - setConfig/getConfig', () => {
+	const CONFIG = {EXTERNAL_BASE_URL: "http://demo.url"};
+	afterEach(() => resetConfig());
+
+	it('should return config (afterwards)', async () => {
+		setConfig(CONFIG);
+		const config = await getConfig();
+		expect(config).to.deep.equal(CONFIG);
+	});
+	it('should return config (beforehand)', (done) => {
+		getConfig().then((config) => {
+			expect(config).to.deep.equal(CONFIG);
+			done();
+		});
+		setConfig(CONFIG);
+	});
+});
+
+describe('frontend:utils - getUserInfo', () => {
+	const CONFIG = {EXTERNAL_BASE_URL: "http://demo.url"};
+	const USER_INFO: Partial<UserInfo> = {
+		name: "John Doe",
+	};
+
+	beforeEach(() => setConfig(CONFIG));
+	afterEach(() => resetConfig());
+
+	it('should equal fetched', async () => {
+		setConfig(CONFIG);
+		fetchMock.mock('http://demo.url/api/user', {
+			status: 200,
+			body: JSON.stringify(USER_INFO),
+		});
+		const userInfo = await getUserInfo();
+		expect(userInfo).to.deep.equal(USER_INFO);
+	});
+});
+
+describe('frontend:utils - resolvable', () => {
+	const DATA = 5;
+	const ERROR = new Error("Custom error!");
+
+	it('waitForSync should return data (afterwards)', async () => {
+		const resolvable = new WaitForSync<number>();
+		resolvable.setData(DATA);
+		const data = await resolvable.resolve();
+		expect(data).to.deep.equal(DATA);
+	});
+	it('waitForSync should return data (beforehand)', (done) => {
+		const resolvable = new WaitForSync<number>();
+		resolvable.resolve().then((data) => {
+			expect(data).to.deep.equal(DATA);
+			done();
+		});
+		resolvable.setData(DATA);
+	});
+
+	it('waitForSync should error (afterwards)', async () => {
+		const resolvable = new WaitForSync<number>();
+		resolvable.setError(ERROR);
+		try {
+			await resolvable.resolve();
+		} catch (err) {
+			expect(err).to.deep.equal(ERROR);
+		}
+	});
+	it('waitForSync should error (beforehand)', (done) => {
+		const resolvable = new WaitForSync<number>();
+		resolvable.resolve().catch((err) => {
+			expect(err).to.deep.equal(ERROR);
+			done();
+		});
+		resolvable.setError(ERROR);
+	});
+
+	it('waitForSync should resolve data twice', async () => {
+		const resolvable = new WaitForSync<number>();
+		resolvable.setData(DATA);
+		const data1 = await resolvable.resolve();
+		const data2 = await resolvable.resolve();
+		expect(data1).to.deep.equal(DATA);
+		expect(data2).to.deep.equal(DATA);
+	});
+	it('waitForSync should error twice', async () => {
+		const resolvable = new WaitForSync<number>();
+		resolvable.setError(ERROR);
+		try {
+			await resolvable.resolve();
+		} catch (err) {
+			expect(err).to.deep.equal(ERROR);
+		}
+		try {
+			await resolvable.resolve();
+		} catch (err) {
+			expect(err).to.deep.equal(ERROR);
+		}
+	});
+	it('waitForSync should wait for resolution twice', (done) => {
+		const resolvable = new WaitForSync<number>();
+		Promise.all([
+			resolvable.resolve().then((data) => {
+				expect(data).to.deep.equal(DATA);
+			}), resolvable.resolve().then((data) => {
+				expect(data).to.deep.equal(DATA);
+			}),
+		]).then(() => done());
+		resolvable.setData(DATA);
+	});
+
+	it('resolvable should resolve', async () => {
+		const resolvable = new Resolvable(async () => DATA);
+		const data = await resolvable.resolve();
+		expect(data).to.deep.equal(DATA);
+	});
+});
diff --git a/public/js-source/utils/types/userinfo.d.ts b/public/js-source/utils/types/userinfo.d.ts
deleted file mode 100644
index c11e154..0000000
--- a/public/js-source/utils/types/userinfo.d.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-type UserInfo = {
-	email: string,
-	email_verified: boolean,
-	family_name: string,
-	given_name: string,
-	groups: string[],
-	name: string,
-	preferred_username: string,
-	sub: string,
-};
diff --git a/src/types/extend-request.d.ts b/src/types/extend-request.d.ts
index 4b557a2..068e6fc 100644
--- a/src/types/extend-request.d.ts
+++ b/src/types/extend-request.d.ts
@@ -14,7 +14,7 @@ declare global {
 		}
 
 		interface Request {
-			getUserInfo(): Promise<UserInfo|undefined>;
+			getUserInfo(): Promise<Partial<UserInfo>|undefined>;
 			noLogging: boolean|undefined;
 			permissionDetails?: import('role-acl').Permission;
 		}
diff --git a/types/auth-proxy.d.ts b/types/auth-proxy.d.ts
deleted file mode 100644
index 1fe0e51..0000000
--- a/types/auth-proxy.d.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-declare namespace Express {
-	interface Request {
-		getUserInfo(): Promise<import('pkg-express-utils').UserInfo|undefined>;
-	}
-
-	interface Response {
-		initLogout(): boolean;
-	}
-}
diff --git a/types/json-prune.d.ts b/types/json-prune.d.ts
deleted file mode 100644
index 3743ad9..0000000
--- a/types/json-prune.d.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-declare module "json-prune" {
-	function prune(object: unknown): string;
-
-	export = prune;
-}
diff --git a/types/logging.d.ts b/types/logging.d.ts
deleted file mode 100644
index 83b2916..0000000
--- a/types/logging.d.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-declare namespace Express {
-	interface Request {
-		noLogging: boolean|undefined;
-	}
-}
diff --git a/types/permissions.d.ts b/types/permissions.d.ts
deleted file mode 100644
index 49ed626..0000000
--- a/types/permissions.d.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-declare namespace Express {
-	interface Request {
-		permissionDetails?: import('role-acl').Permission;
-	}
-}
diff --git a/types/polyfill.d.ts b/types/polyfill.d.ts
deleted file mode 100644
index b8894ec..0000000
--- a/types/polyfill.d.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-declare module "polyfill-library" {
-	import {Readable} from 'stream';
-
-	function listAllPolyfills(): string[];
-	function describePolyfill(featureName: string): Promise<PolyfillMetadata|undefined>;
-	function getOptions(opts: Partial<PolyfillOptions>): PolyfillOptions;
-	function getPolyfills(opts: Partial<PolyfillOptions>): Promise<PolyfillFeatures>;
-	function getPolyfillString(opts: Partial<PolyfillOptions>&{stream?: true}): Readable;
-	function getPolyfillString(opts: Partial<PolyfillOptions>&{stream: false}): Promise<string>;
-
-	type PolyfillMetadata = {
-
-	};
-
-	type PolyfillFeatureList = {
-		[featureName: string]: {
-			flags?: string[]
-		}
-	};
-
-	type PolyfillOptions = {
-		minify: boolean,
-		unknown: 'polyfill'|'ignore',
-		features: PolyfillFeatureList,
-		excludes: string[],
-		uaString: string,
-		rum: boolean,
-	};
-
-	type PolyfillFeature = {
-		flags: string[],
-		dependencyOf: string[],
-		aliasOf: string[],
-	}
-
-	type PolyfillFeatures = { [featureName: string]: PolyfillFeature };
-}