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tmichel/email_test.go

Created October 12, 2014 11:58
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  1. tmichel created this gist Oct 12, 2014.
    65 changes: 65 additions & 0 deletions email_test.go
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,65 @@
    package email

    import (
    "net/smtp"
    "testing"
    )

    type EmailConfig struct {
    Username string
    Password string
    ServerHost string
    ServerPort string
    SenderAddr string
    }

    type EmailSender interface {
    Send(to []string, body []byte) error
    }

    func NewEmailSender(conf EmailConfig) EmailSender {
    return &emailSender{conf, smtp.SendMail}
    }

    type emailSender struct {
    conf EmailConfig
    send func(string, smtp.Auth, string, []string, []byte) error
    }

    func (e *emailSender) Send(to []string, body []byte) error {
    addr := e.conf.ServerHost + ":" + e.conf.ServerPort
    auth := smtp.PlainAuth("", e.conf.Username, e.conf.Password, e.conf.ServerHost)
    return e.send(addr, auth, e.conf.SenderAddr, to, body)
    }

    /****** testing ******/

    func TestEmail_SendSuccessful(t *testing.T) {
    f, r := mockSend(nil)
    sender := &emailSender{send: f}
    body := "Hello World"
    err := sender.Send([]string{"me@example.com"}, []byte(body))

    if err != nil {
    t.Errorf("unexpected error: %s", err)
    }
    if string(r.msg) != body {
    t.Errorf("wrong message body.\n\nexpected: %\n got: %s", body, r.msg)
    }
    }

    func mockSend(errToReturn error) (func(string, smtp.Auth, string, []string, []byte) error, *emailRecorder) {
    r := new(emailRecorder)
    return func(addr string, a smtp.Auth, from string, to []string, msg []byte) error {
    *r = emailRecorder{addr, a, from, to, msg}
    return errToReturn
    }, r
    }

    type emailRecorder struct {
    addr string
    auth smtp.Auth
    from string
    to []string
    msg []byte
    }