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package mail_test
import (
"io"
"io/ioutil"
"log"
"strings"
"testing"
"github.com/emersion/go-message/mail"
)
func ExampleReader() {
// Let's assume r is an io.Reader that contains a mail.
var r io.Reader
// Create a new mail reader
mr, err := mail.CreateReader(r)
if err != nil {
log.Fatal(err)
}
// Read each mail's part
for {
p, err := mr.NextPart()
if err == io.EOF {
break
} else if err != nil {
log.Fatal(err)
}
switch h := p.Header.(type) {
case *mail.InlineHeader:
b, _ := ioutil.ReadAll(p.Body)
log.Printf("Got text: %v\n", string(b))
case *mail.AttachmentHeader:
filename, _ := h.Filename()
log.Printf("Got attachment: %v\n", filename)
}
}
}
func testReader(t *testing.T, r io.Reader) {
mr, err := mail.CreateReader(r)
if err != nil {
t.Fatalf("mail.CreateReader(r) = %v", err)
}
defer mr.Close()
wantSubject := "Your Name"
subject, err := mr.Header.Subject()
if err != nil {
t.Errorf("mr.Header.Subject() = %v", err)
} else if subject != wantSubject {
t.Errorf("mr.Header.Subject() = %v, want %v", subject, wantSubject)
}
i := 0
for {
p, err := mr.NextPart()
if err == io.EOF {
break
} else if err != nil {
t.Fatal(err)
}
var expectedBody string
switch i {
case 0:
h, ok := p.Header.(*mail.InlineHeader)
if !ok {
t.Fatalf("Expected a InlineHeader, but got a %T", p.Header)
}
if mediaType, _, _ := h.ContentType(); mediaType != "text/plain" {
t.Errorf("Expected a plaintext part, not an HTML part")
}
expectedBody = "Who are you?"
case 1:
h, ok := p.Header.(*mail.AttachmentHeader)
if !ok {
t.Fatalf("Expected an AttachmentHeader, but got a %T", p.Header)
}
if filename, err := h.Filename(); err != nil {
t.Error("Expected no error while parsing filename, but got:", err)
} else if filename != "note.txt" {
t.Errorf("Expected filename to be %q but got %q", "note.txt", filename)
}
expectedBody = "I'm Mitsuha."
}
if b, err := ioutil.ReadAll(p.Body); err != nil {
t.Error("Expected no error while reading part body, but got:", err)
} else if string(b) != expectedBody {
t.Errorf("Expected part body to be:\n%v\nbut got:\n%v", expectedBody, string(b))
}
i++
}
if i != 2 {
t.Errorf("Expected exactly two parts but got %v", i)
}
}
func TestReader(t *testing.T) {
testReader(t, strings.NewReader(mailString))
}
func TestReader_nonMultipart(t *testing.T) {
s := "Subject: Your Name\r\n" +
"\r\n" +
"Who are you?"
mr, err := mail.CreateReader(strings.NewReader(s))
if err != nil {
t.Fatal("Expected no error while creating reader, got:", err)
}
defer mr.Close()
p, err := mr.NextPart()
if err != nil {
t.Fatal("Expected no error while reading part, got:", err)
}
if _, ok := p.Header.(*mail.InlineHeader); !ok {
t.Fatalf("Expected a InlineHeader, but got a %T", p.Header)
}
expectedBody := "Who are you?"
if b, err := ioutil.ReadAll(p.Body); err != nil {
t.Error("Expected no error while reading part body, but got:", err)
} else if string(b) != expectedBody {
t.Errorf("Expected part body to be:\n%v\nbut got:\n%v", expectedBody, string(b))
}
if _, err := mr.NextPart(); err != io.EOF {
t.Fatal("Expected io.EOF while reading part, but got:", err)
}
}
func TestReader_closeImmediately(t *testing.T) {
s := "Content-Type: text/plain\r\n" +
"\r\n" +
"Who are you?"
mr, err := mail.CreateReader(strings.NewReader(s))
if err != nil {
t.Fatal("Expected no error while creating reader, got:", err)
}
mr.Close()
if _, err := mr.NextPart(); err != io.EOF {
t.Fatal("Expected io.EOF while reading part, but got:", err)
}
}
func TestReader_nested(t *testing.T) {
r := strings.NewReader(nestedMailString)
mr, err := mail.CreateReader(r)
if err != nil {
t.Fatalf("mail.CreateReader(r) = %v", err)
}
defer mr.Close()
i := 0
for {
p, err := mr.NextPart()
if err == io.EOF {
break
} else if err != nil {
t.Fatal(err)
}
switch i {
case 0:
_, ok := p.Header.(*mail.InlineHeader)
if !ok {
t.Fatalf("Expected a InlineHeader, but got a %T", p.Header)
}
expectedBody := "I forgot."
if b, err := ioutil.ReadAll(p.Body); err != nil {
t.Error("Expected no error while reading part body, but got:", err)
} else if string(b) != expectedBody {
t.Errorf("Expected part body to be:\n%v\nbut got:\n%v", expectedBody, string(b))
}
case 1:
_, ok := p.Header.(*mail.AttachmentHeader)
if !ok {
t.Fatalf("Expected an AttachmentHeader, but got a %T", p.Header)
}
testReader(t, p.Body)
}
i++
}
}
|
