Replace repetitive TLS configuration code with a reusable `getTLSConfig` helper function for consistency and maintainability. Additionally, update port configuration and add new tests for mail data transmission.
Changed `t.Errorf` to `t.Fatalf` in multiple instances within the test cases. This ensures that the tests halt immediately upon a critical failure, improving test reliability and debugging clarity.
Update SMTP tests to use t.Cleanup for client cleanup to ensure proper resource release. Introduce a new test, TestClient_Rcpt, to verify recipient address handling under various conditions.
Introduce new test cases to verify the SMTP server's ability to handle DSN, 8BITMIME, and SMTPUTF8 features. These tests ensure correct response behavior when these features are supported by the server.
Introduce new tests for the SMTP client covering scenarios for Mail, Verify, and Auth commands to ensure correct behavior under various conditions. Updated `simpleSMTPServer` implementation to handle more cases including VRFY and SMTPUTF8.
Introduce tests to verify TLS connection state handling in the SMTP client. Ensure that normal TLS connections return a valid state, and non-TLS connections do not wrongly indicate a TLS state.
Introduce new tests to cover the Client's behavior when initiating a STARTTLS session under different conditions: normal operation, failure on EHLO/HELO, and a server not supporting STARTTLS. This ensures robustness in handling STARTTLS interactions.
This commit introduces a new test case for the `Client`'s `cmd` method to ensure it fails correctly when the `textproto` command encounters a broken writer. It also adds a `failWriter` struct that simulates a write failure to facilitate this testing scenario.
Add tests to ensure HELO/EHLO commands fail with empty name, newline in name, and double execution. This improves validation and robustness of the SMTP client implementation.
Consolidate and organize SMTP test cases by removing obsolete tests and adding focused, detailed tests for CRAM-MD5 and new client behaviors. This ensures clearer test structure and better coverage of edge cases.
Introduce new test cases to validate the error handling of the scramAuth methods. These tests cover scenarios such as invalid characters in usernames, empty inputs, and edge cases like broken rand.Reader.
Corrected "crypto/tl" to "crypto/tls" in the comment for better clarity and accuracy. This typo fix ensures that the code comments correctly reference the relevant Go package.
Corrected the spelling of "failed" in the error handling branch of the normalizeString function within smtp/auth_scram.go. This change addresses a minor typographical error to ensure the error message is clear and accurate.
Added comprehensive unit tests for SCRAM-SHA-1, SCRAM-SHA-256, and their PLUS variants. Implemented a test server to simulate various SCRAM authentication scenarios and validate both success and failure cases.
Introduces two tests for XOAuth2 authentication in the SMTP package. The first test ensures successful authentication with valid credentials, while the second test verifies that authentication fails with incorrect settings.
This commit enhances the cleanup process in the SMTP tests by adding t.Cleanup to close client connections. Additionally, it rewrites the TestXOAuth2 function to include more detailed sub-tests, enhancing test granularity and readability.
Added a simple SMTP test server with basic features like PLAIN, LOGIN, and NOENC authentication. It can start, handle connections, and simulate authentication success or failure. Included support for TLS with a generated localhost certificate.
Renamed the test functions and improved the test structure for login authentication checks. Added subtests to provide clear descriptions and enhance error checking.
Rename and uncomment TestLoginAuth with more test cases, ensuring coverage for successful and failed authentication scenarios, including checks for unencrypted logins and server response errors. This improves test robustness and coverage.
Updated the parameter name `allowUnEnc` to `allowUnenc` in both `LoginAuth` and `PlainAuth` functions to maintain consistent naming conventions. This change improves code readability and follows standard naming practices.
Introduce a unit test to ensure that invoking Close on a nil smtpclient instance returns nil without errors. This enhances the robustness of the client closure functionality. This test accommodates the fix provided with PR #353
Refactor the test function `TestPlainAuth_noEnc` to include subtests for better organization and add more comprehensive error handling. This improves clarity and robustness by verifying various authentication scenarios and expected outcomes.
Improved the structure and readability of the authentication tests by using subtests for each scenario, ensuring better isolation and clearer failure reporting. Removed unnecessary imports and redundant code, reducing complexity and enhancing maintainability.
This test ensures that when MessageID is called on a nil SendError, it returns an empty string. This additional check helps verify the correct behavior of the MessageID method under nil conditions.
The `sudo apt-get -y upgrade` command was removed from the CI workflow's "Install sendmail" step. This change simplifies the installation process by ensuring only the necessary updates and installations are performed, which can contribute to faster and more reliable CI runs.
This change ensures that the output of the apt-get commands is no longer redirected to /dev/null. This aids in debugging by making command outputs visible in the CI logs.
Consolidated multiple duplicate test cases into grouped sub-tests with clear names. This enhances readability and maintainability, ensures proper test isolation, and removes redundant code.
Replaced constant with named error for readability and maintainability in the error handling condition. Adjusted error message formatting by removing an extra space for consistency.
Refactored the test for `randomStringSecure` to better organize test cases using subtests. Added new test cases to check failures with a broken rand.Reader, improving test coverage and robustness.
Updated the base64-encoded string for attachments in the tests to reflect the correct newline character for Windows. This ensures that the test cases correctly validate the presence of attachments in the mail messages.
