Added Tests for (/lib/utils): 100% Coverage

packages/better_networking/test/utils/string_utils_test.dart

@@ -0,0 +1,37 @@
+import 'package:better_networking/utils/string_utils.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group('RandomStringGenerator', () {
+    test('getRandomString returns correct length', () {
+      final result = RandomStringGenerator.getRandomString(10);
+      expect(result.length, 10);
+    });
+
+    test('getRandomString returns only valid characters', () {
+      final result = RandomStringGenerator.getRandomString(100);
+      const _chars =
+          'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890';
+      final validChars = _chars.split('').toSet();
+      final isValid = result.split('').every(validChars.contains);
+      expect(isValid, true);
+    });
+
+    test('getRandomStringLines returns correct number of lines', () {
+      final result = RandomStringGenerator.getRandomStringLines(5, 8);
+      final lines = result.split('\n');
+      expect(lines.length, 5);
+      expect(lines.every((line) => line.length == 8), true);
+    });
+
+    test('getRandomStringLines returns empty string for 0 lines', () {
+      final result = RandomStringGenerator.getRandomStringLines(0, 8);
+      expect(result, '');
+    });
+
+    test('getRandomString returns empty string for length 0', () {
+      final result = RandomStringGenerator.getRandomString(0);
+      expect(result, '');
+    });
+  });
+}