TF-2667 Validate email in recipient form before send email

core/test/utils/mail_address_test.dart

@@ -0,0 +1,62 @@
+import 'package:core/domain/exceptions/address_exception.dart';
+import 'package:core/utils/mail/mail_address.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  group('MailAddress test', () {
+    test('validate method should be return MailAddress when address valid', () {
+      String validAddress = 'user@example.com';
+      MailAddress mailAddress = MailAddress.validate(validAddress);
+      expect(mailAddress.localPart, equals('user'));
+      expect(mailAddress.domain.name(), equals('example.com'));
+    });
+
+    test('validate method should be throw AddressException when address missing @', () {
+      String invalidAddress = 'userexample.com';
+      expect(
+        () => MailAddress.validate(invalidAddress),
+        throwsA(isA<AddressException>().having(
+          (e) => e.message,
+          'message',
+          'Did not find @ between local-part and domain at position 16 in "userexample.com"')
+        )
+      );
+    });
+
+    test('validate method should be throw AddressException when address empty local-part', () {
+      String invalidAddress = '@example.com';
+      expect(
+        () => MailAddress.validate(invalidAddress),
+        throwsA(isA<AddressException>().having(
+          (e) => e.message,
+          'message',
+          'No local-part (user account) found at position 1  in "@example.com"')
+        )
+      );
+    });
+
+    test('validate method should be throw AddressException when address empty domain', () {
+      String invalidAddress = 'user@';
+      expect(
+        () => MailAddress.validate(invalidAddress),
+        throwsA(isA<AddressException>().having(
+          (e) => e.message,
+          'message',
+          'No domain found at position 6 in "user@"')
+        )
+      );
+    });
+
+    test('validate method should be throw AddressException when address with a hyphen "-"', () {
+      String invalidAddress = 'user@-example.com';
+      expect(
+        () => MailAddress.validate(invalidAddress),
+        throwsA(isA<AddressException>().having(
+          (e) => e.message,
+          'message',
+          'Domain name cannot begin or end with a hyphen "-" at position 14 in "user@-example.com"')
+        )
+      );
+    });
+  });
+}