mirror of
https://github.com/wneessen/go-mail.git
synced 2024-11-22 13:50:49 +01:00
102 lines
2.8 KiB
Go
102 lines
2.8 KiB
Go
package mail
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import (
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"bytes"
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"fmt"
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"io"
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"mime"
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"strings"
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"testing"
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"time"
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)
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// brokenWriter implements a broken writer for io.Writer testing
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type brokenWriter struct {
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io.Writer
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}
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// Write implements the io.Writer interface but intentionally returns an error at
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// any time
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func (bw *brokenWriter) Write([]byte) (int, error) {
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return 0, fmt.Errorf("intentionally failed")
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}
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// TestMsgWriter_Write tests the Write() method of the msgWriter
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func TestMsgWriter_Write(t *testing.T) {
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bw := &brokenWriter{}
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mw := &msgWriter{w: bw, c: CharsetUTF8, en: mime.QEncoding}
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_, err := mw.Write([]byte("test"))
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if err == nil {
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t.Errorf("msgWriter Write() with brokenWriter should fail, but didn't")
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}
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// Also test the part when a previous error happend
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mw.err = fmt.Errorf("broken")
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_, err = mw.Write([]byte("test"))
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if err == nil {
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t.Errorf("msgWriter Write() with brokenWriter should fail, but didn't")
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}
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}
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// TestMsgWriter_writeMsg tests the writeMsg method of the msgWriter
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func TestMsgWriter_writeMsg(t *testing.T) {
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m := NewMsg()
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_ = m.From(`"Toni Tester" <test@example.com>`)
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_ = m.To(`"Toni Receiver" <receiver@example.com>`)
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m.Subject("This is a subject")
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m.SetBulk()
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now := time.Now()
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m.SetDateWithValue(now)
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m.SetMessageIDWithValue("message@id.com")
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m.SetBodyString(TypeTextPlain, "This is the body")
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buf := bytes.Buffer{}
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mw := &msgWriter{w: &buf, c: CharsetUTF8, en: mime.QEncoding}
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mw.writeMsg(m)
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ms := buf.String()
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var ea []string
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if !strings.Contains(ms, `MIME-Version: 1.0`) {
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ea = append(ea, "MIME-Version")
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}
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if !strings.Contains(ms, fmt.Sprintf("Date: %s", now.Format(time.RFC1123Z))) {
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ea = append(ea, "Date")
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}
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if !strings.Contains(ms, `Message-ID: <message@id.com>`) {
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ea = append(ea, "Message-ID")
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}
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if !strings.Contains(ms, `Precedence: bulk`) {
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ea = append(ea, "Precedence")
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}
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if !strings.Contains(ms, `Subject: This is a subject`) {
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ea = append(ea, "Subject")
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}
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if !strings.Contains(ms, `User-Agent: go-mail v`) {
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ea = append(ea, "User-Agent")
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}
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if !strings.Contains(ms, `X-Mailer: go-mail v`) {
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ea = append(ea, "X-Mailer")
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}
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if !strings.Contains(ms, `From: "Toni Tester" <test@example.com>`) {
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ea = append(ea, "From")
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}
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if !strings.Contains(ms, `To: "Toni Receiver" <receiver@example.com>`) {
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ea = append(ea, "To")
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}
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if !strings.Contains(ms, `Content-Type: text/plain; charset=UTF-8`) {
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ea = append(ea, "Content-Type")
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}
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if !strings.Contains(ms, `Content-Transfer-Encoding: quoted-printable`) {
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ea = append(ea, "Content-Transfer-Encoding")
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}
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if !strings.Contains(ms, "\r\n\r\nThis is the body") {
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ea = append(ea, "Message body")
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}
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if len(ea) > 0 {
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em := "writeMsg() failed. The following errors occured:\n"
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for e := range ea {
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em += fmt.Sprintf("* incorrect %q field", ea[e])
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}
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em += fmt.Sprintf("\n\nFull message:\n%s", ms)
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t.Errorf(em)
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}
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}
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