Added test suite

tests/misc.spec.ts

@@ -1,18 +1,44 @@
-import {fn} from '../src';
+import {fn, gravatar, escapeRegex, md5} from '../src';
 
-describe('Miscellanies Utilities', () => {
+describe('Misc Utilities', () => {
 	describe('fn', () => {
-		test('async', async () => {
-			const test = {a: Math.random()};
-			const resp = fn(test, 'return a;', true);
-			expect(resp instanceof Promise).toBeTruthy();
-			expect(await resp).toEqual(test['a']);
+		it('should execute a stringified function with arguments', () => {
+			const result = fn({ x: 2, y: 3 }, 'return x + y;');
+			expect(result).toBe(5);
 		});
 
-		test('sync', async () => {
-			const test = {a: Math.random()};
-			const resp = fn(test, 'return a;3');
-			expect(resp).toEqual(test['a']);
+		it('should execute an async function if async=true', async () => {
+			const asyncFn = 'return await Promise.resolve(x * y);';
+			const result = await fn({ x: 3, y: 4 }, asyncFn, true);
+			expect(result).toBe(12);
+		});
+
+		it('should work with no arguments', () => {
+			const result = fn({}, 'return 42;');
+			expect(result).toBe(42);
+		});
+	});
+
+	describe('gravatar', () => {
+		it('should return empty string if email is falsy', () => {
+			expect(gravatar('')).toBe('');
+		});
+		it('should build correct gravatar url', () => {
+			const email = 'test@example.com';
+			expect(gravatar(email)).toContain(`https://www.gravatar.com/avatar/${md5(email)}`);
+		});
+	});
+
+	describe('escapeRegex', () => {
+		it('should escape all special regex characters', () => {
+			const special = '.*+?^${}()|[]\\';
+			const escaped = escapeRegex(special);
+			expect(escaped).toBe('\\.\\*\\+\\?\\^\\$\\{\\}\\(\\)\\|\\[\\]\\\\');
+		});
+		it('should return original string if nothing to escape', () => {
+			const normal = 'abc123';
+			const escaped = escapeRegex(normal);
+			expect(escaped).toBe('abc123');
 		});
 	});
 });