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Add fig.StringUnmarshaler support for SMTPAuthType

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Implement the fig.StringUnmarshaler interface for SMTPAuthType to map strings to corresponding authentication types. Added comprehensive unit tests to ensure correct functionality for all supported auth type strings.
This commit is contained in:
Winni Neessen 2024-10-21 22:24:21 +02:00
parent c903f6e1b4
commit 7bebdda27c
Signed by: wneessen
GPG key ID: 385AC9889632126E
2 changed files with 82 additions and 1 deletions
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36
auth.go
View file

@ -4,7 +4,11 @@
package mail
import "errors"
import (
"errors"
"fmt"
"strings"
)
// SMTPAuthType is a type wrapper for a string type. It represents the type of SMTP authentication
// mechanism to be used.
@ -134,3 +138,33 @@ var (
// authentication type.
ErrSCRAMSHA256PLUSAuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-256-PLUS")
)
// UnmarshalString satisfies the fig.StringUnmarshaler interface for the SMTPAuthType type
// https://pkg.go.dev/github.com/kkyr/fig#StringUnmarshaler
func (sa *SMTPAuthType) UnmarshalString(value string) error {
switch strings.ToLower(value) {
case "cram-md5", "crammd5", "cram":
*sa = SMTPAuthCramMD5
case "custom":
*sa = SMTPAuthCustom
case "login":
*sa = SMTPAuthLogin
case "none", "noauth", "no":
*sa = SMTPAuthNoAuth
case "plain":
*sa = SMTPAuthPlain
case "scram-sha-1", "scram-sha1", "scramsha1":
*sa = SMTPAuthSCRAMSHA1
case "scram-sha-1-plus", "scram-sha1-plus", "scramsha1plus":
*sa = SMTPAuthSCRAMSHA1PLUS
case "scram-sha-256", "scram-sha256", "scramsha256":
*sa = SMTPAuthSCRAMSHA256
case "scram-sha-256-plus", "scram-sha256-plus", "scramsha256plus":
*sa = SMTPAuthSCRAMSHA256PLUS
case "xoauth2", "oauth2":
*sa = SMTPAuthXOAUTH2
default:
return fmt.Errorf("unsupported SMTP auth type: %s", value)
}
return nil
}

47
auth_test.go Normal file
View file

@ -0,0 +1,47 @@
package mail
import "testing"
func TestSMTPAuthType_UnmarshalString(t *testing.T) {
tests := []struct {
name string
authString string
expected SMTPAuthType
}{
{"CRAM-MD5: cram-md5", "cram-md5", SMTPAuthCramMD5},
{"CRAM-MD5: crammd5", "crammd5", SMTPAuthCramMD5},
{"CRAM-MD5: cram", "cram", SMTPAuthCramMD5},
{"CUSTOM", "custom", SMTPAuthCustom},
{"LOGIN", "login", SMTPAuthLogin},
{"NONE: none", "none", SMTPAuthNoAuth},
{"NONE: noauth", "noauth", SMTPAuthNoAuth},
{"NONE: no", "no", SMTPAuthNoAuth},
{"PLAIN", "plain", SMTPAuthPlain},
{"SCRAM-SHA-1: scram-sha-1", "scram-sha-1", SMTPAuthSCRAMSHA1},
{"SCRAM-SHA-1: scram-sha1", "scram-sha1", SMTPAuthSCRAMSHA1},
{"SCRAM-SHA-1: scramsha1", "scramsha1", SMTPAuthSCRAMSHA1},
{"SCRAM-SHA-1-PLUS: scram-sha-1-plus", "scram-sha-1-plus", SMTPAuthSCRAMSHA1PLUS},
{"SCRAM-SHA-1-PLUS: scram-sha1-plus", "scram-sha1-plus", SMTPAuthSCRAMSHA1PLUS},
{"SCRAM-SHA-1-PLUS: scramsha1plus", "scramsha1plus", SMTPAuthSCRAMSHA1PLUS},
{"SCRAM-SHA-256: scram-sha-256", "scram-sha-256", SMTPAuthSCRAMSHA256},
{"SCRAM-SHA-256: scram-sha256", "scram-sha256", SMTPAuthSCRAMSHA256},
{"SCRAM-SHA-256: scramsha256", "scramsha256", SMTPAuthSCRAMSHA256},
{"SCRAM-SHA-256-PLUS: scram-sha-256-plus", "scram-sha-256-plus", SMTPAuthSCRAMSHA256PLUS},
{"SCRAM-SHA-256-PLUS: scram-sha256-plus", "scram-sha256-plus", SMTPAuthSCRAMSHA256PLUS},
{"SCRAM-SHA-256-PLUS: scramsha256plus", "scramsha256plus", SMTPAuthSCRAMSHA256PLUS},
{"XOAUTH2: xoauth2", "xoauth2", SMTPAuthXOAUTH2},
{"XOAUTH2: oauth2", "oauth2", SMTPAuthXOAUTH2},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
var authType SMTPAuthType
if err := authType.UnmarshalString(tt.authString); err != nil {
t.Errorf("UnmarshalString() for type %s failed: %s", tt.authString, err)
}
if authType != tt.expected {
t.Errorf("UnmarshalString() for type %s failed: expected %s, got %s",
tt.authString, tt.expected, authType)
}
})
}
}