snapshot of https://github.com/RocketChat/Rocket.Chat.git (develop, 2026-09-16; blobs > 131072B omitted)

apps/meteor/tests/unit/server/lib/users/validateUsername.spec.ts

@@ -0,0 +1,94 @@
+import { expect } from 'chai';
+import proxyquire from 'proxyquire';
+import sinon from 'sinon';
+
+describe('validateUsername', () => {
+	const getStub = sinon.stub();
+
+	const proxySettings = {
+		settings: {
+			get: getStub,
+		},
+	};
+
+	const { validateUsername } = proxyquire.noCallThru().load('../../../../../server/lib/users/validateUsername', {
+		'../../settings': proxySettings,
+	});
+
+	beforeEach(() => {
+		getStub.reset();
+	});
+
+	afterEach(() => {
+		sinon.restore();
+	});
+
+	describe('with default settings', () => {
+		beforeEach(() => {
+			getStub.withArgs('UTF8_User_Names_Validation').returns('[0-9a-zA-Z-_.]+');
+		});
+
+		it('should return true for a valid username', () => {
+			const result = validateUsername('valid_username.123');
+			expect(result).to.be.true;
+		});
+
+		it('should return false for an invalid username containing special HTML tags', () => {
+			const result = validateUsername('username<div>$</div>');
+			expect(result).to.be.false;
+		});
+
+		it('should return false for an empty username', () => {
+			const result = validateUsername('');
+			expect(result).to.be.false;
+		});
+
+		it('should return false for a username with invalid characters', () => {
+			const result = validateUsername('invalid*username!');
+			expect(result).to.be.false;
+		});
+
+		it('should return true for a username with allowed special characters', () => {
+			const result = validateUsername('username-_.');
+			expect(result).to.be.true;
+		});
+	});
+
+	describe('with custom regex settings', () => {
+		beforeEach(() => {
+			getStub.withArgs('UTF8_User_Names_Validation').returns('[a-zA-Z]+');
+		});
+
+		it('should return true for a username matching the custom regex', () => {
+			const result = validateUsername('ValidUsername');
+			expect(result).to.be.true;
+		});
+
+		it('should return false for a username that does not match the custom regex', () => {
+			const result = validateUsername('username123');
+			expect(result).to.be.false;
+		});
+	});
+
+	describe('with null regex settings', () => {
+		beforeEach(() => {
+			getStub.withArgs('UTF8_User_Names_Validation').returns(null);
+		});
+
+		it('should fallback to the default regex pattern if the settings value is null', () => {
+			const result = validateUsername('username');
+			expect(result).to.be.true;
+		});
+	});
+
+	describe('with invalid regex settings', () => {
+		beforeEach(() => {
+			getStub.withArgs('UTF8_User_Names_Validation').returns('invalid[');
+		});
+
+		it('should fallback to the default regex pattern if the settings value is invalid', () => {
+			const result = validateUsername('username');
+			expect(result).to.be.true;
+		});
+	});
+});