TF-3344 Handle separator when pasting list of mail addresses

core/test/utils/string_convert_test.dart

@@ -0,0 +1,162 @@
+import 'dart:convert';
+
+import 'package:core/utils/string_convert.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('StringConvert::extractStrings::', () {
+    group('Basic Functionality', () {
+      test('should extract strings separated by spaces', () {
+        const input = 'user1@example.com user2@example.com';
+        final expected = ['user1@example.com', 'user2@example.com'];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should extract strings separated by commas', () {
+        const input = 'user1@example.com,user2@example.com';
+        final expected = ['user1@example.com', 'user2@example.com'];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should extract strings separated by semicolons', () {
+        const input = 'user1@example.com;user2@example.com';
+        final expected = ['user1@example.com', 'user2@example.com'];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should extract strings separated by mixed separators', () {
+        const input = 'user1@example.com, user2@example.com; user3@example.com';
+        final expected = [
+          'user1@example.com',
+          'user2@example.com',
+          'user3@example.com'
+        ];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should handle multiple consecutive separators', () {
+        const input =
+            'user1@example.com,,;  user2@example.com;;  user3@example.com';
+        final expected = [
+          'user1@example.com',
+          'user2@example.com',
+          'user3@example.com'
+        ];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+    });
+
+    group('Edge Cases', () {
+      test('should handle empty input', () {
+        const input = '';
+        final expected = <String>[];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should handle input with only separators', () {
+        const input = ',, ;;   ';
+        final expected = <String>[];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should handle trailing and leading separators', () {
+        const input = ', user1@example.com; user2@example.com ,';
+        final expected = ['user1@example.com', 'user2@example.com'];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should handle extra spaces between separators', () {
+        const input = 'user1@example.com   ,   user2@example.com ;   user3@example.com';
+        final expected = [
+          'user1@example.com',
+          'user2@example.com',
+          'user3@example.com'
+        ];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+    });
+
+    group('Stress Tests', () {
+      test('should handle a large number of strings', () {
+        final input = List.generate(
+          1000,
+          (index) =>
+              'user$index@example.com${index % 3 == 0 ? ',' : index % 3 == 1 ? ';' : ' '}',
+        ).join();
+        final expected =
+            List.generate(1000, (index) => 'user$index@example.com');
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+    });
+
+    group('Encoded Input Tests', () {
+      test('should handle URL encoded input', () {
+        String input = 'user1%40example.com%20user2%40example.com%20user3%40example.com';
+        final expected = [
+          'user1@example.com',
+          'user2@example.com',
+          'user3@example.com'
+        ];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should handle Base64 encoded input', () {
+        String input = 'dXNlcjFAZXhhbXBsZS5jb20gdXNlcjJAZXhhbXBsZS5jb20gdXNlcjNAZXhhbXBsZS5jb20=';
+        final expected = [
+          'user1@example.com',
+          'user2@example.com',
+          'user3@example.com'
+        ];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should handle input with both URL encoding and Base64 encoding', () {
+        String input = Uri.encodeComponent(base64.encode(utf8.encode('user1@example.com user2@example.com user3@example.com')));
+        final expected = [
+          'user1@example.com',
+          'user2@example.com',
+          'user3@example.com'
+        ];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+    });
+
+    group('Failing Cases', () {
+      test('should return empty list for empty input', () {
+        String input = '';
+        expect(StringConvert.extractStrings(input), equals([]));
+      });
+
+      test('should return empty list if input is only separators', () {
+        String input = ' , ; ';
+        expect(StringConvert.extractStrings(input), equals([]));
+      });
+
+      test('should return correct result for input with invalid separators', () {
+        String input = 'user1@example.com,,user2@example.com;;;user3@example.com';
+        final expected = [
+          'user1@example.com',
+          'user2@example.com',
+          'user3@example.com'
+        ];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+
+      test('should return empty list for input with only whitespace and separators', () {
+        String input = '   , ;  \n';
+        expect(StringConvert.extractStrings(input), equals([]));
+      });
+
+      test('should handle input with newline characters', () {
+        // Arrange
+        String input = 'user1@example.com\nuser2@example.com;user3@example.com';
+        final expected = [
+          'user1@example.com',
+          'user2@example.com',
+          'user3@example.com'
+        ];
+        expect(StringConvert.extractStrings(input), equals(expected));
+      });
+    });
+  });
+}