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Add tests for file attachments in msgWriter

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This commit introduces unit tests covering various scenarios for attaching files in email messages using msgWriter. These tests check for proper encoding, custom content types, different transfer encodings, custom descriptions, and handling attachments without body parts.
This commit is contained in:
Winni Neessen 2024-10-28 21:13:36 +01:00
parent 61244a541e
commit 5c8d07407f
Signed by: wneessen
GPG key ID: 385AC9889632126E
1 changed files with 134 additions and 0 deletions
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134
msgwriter_test.go
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@ -296,3 +296,137 @@ func TestMsgWriter_writePreformattedGenHeader(t *testing.T) {
}
})
}
func TestMsgWriter_addFiles(t *testing.T) {
msgwriter := &msgWriter{
charset: CharsetUTF8,
encoder: getEncoder(EncodingQP),
}
t.Run("message with a single file attached", func(t *testing.T) {
buffer := bytes.NewBuffer(nil)
msgwriter.writer = buffer
message := testMessage(t)
message.AttachFile("testdata/attachment.txt")
msgwriter.writeMsg(message)
if msgwriter.err != nil {
t.Errorf("msgWriter failed to write: %s", msgwriter.err)
}
if !strings.Contains(buffer.String(), "VGhpcyBpcyBhIHRlc3QgYXR0YWNobWVudAo=") {
t.Errorf("attachment not found in mail message. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Disposition: attachment; filename="attachment.txt"`) {
t.Errorf("Content-Dispositon header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Type: text/plain; charset=utf-8; name="attachment.txt"`) {
t.Errorf("Content-Type header not found for attachment. Mail: %s", buffer.String())
}
})
t.Run("message with a single file attached no extension", func(t *testing.T) {
buffer := bytes.NewBuffer(nil)
msgwriter.writer = buffer
message := testMessage(t)
message.AttachFile("testdata/attachment")
msgwriter.writeMsg(message)
if msgwriter.err != nil {
t.Errorf("msgWriter failed to write: %s", msgwriter.err)
}
if !strings.Contains(buffer.String(), "VGhpcyBpcyBhIHRlc3QgYXR0YWNobWVudAo=") {
t.Errorf("attachment not found in mail message. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Disposition: attachment; filename="attachment"`) {
t.Errorf("Content-Dispositon header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Type: application/octet-stream; name="attachment"`) {
t.Errorf("Content-Type header not found for attachment. Mail: %s", buffer.String())
}
})
t.Run("message with a single file attached custom content-type", func(t *testing.T) {
buffer := bytes.NewBuffer(nil)
msgwriter.writer = buffer
message := testMessage(t)
message.AttachFile("testdata/attachment.txt", WithFileContentType(TypeAppOctetStream))
msgwriter.writeMsg(message)
if msgwriter.err != nil {
t.Errorf("msgWriter failed to write: %s", msgwriter.err)
}
if !strings.Contains(buffer.String(), "VGhpcyBpcyBhIHRlc3QgYXR0YWNobWVudAo=") {
t.Errorf("attachment not found in mail message. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Disposition: attachment; filename="attachment.txt"`) {
t.Errorf("Content-Dispositon header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Type: application/octet-stream; name="attachment.txt"`) {
t.Errorf("Content-Type header not found for attachment. Mail: %s", buffer.String())
}
})
t.Run("message with a single file attached custom transfer-encoding", func(t *testing.T) {
buffer := bytes.NewBuffer(nil)
msgwriter.writer = buffer
message := testMessage(t)
message.AttachFile("testdata/attachment.txt", WithFileEncoding(EncodingUSASCII))
msgwriter.writeMsg(message)
if msgwriter.err != nil {
t.Errorf("msgWriter failed to write: %s", msgwriter.err)
}
if !strings.Contains(buffer.String(), "\r\n\r\nThis is a test attachment") {
t.Errorf("attachment not found in mail message. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Disposition: attachment; filename="attachment.txt"`) {
t.Errorf("Content-Dispositon header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `text/plain; charset=utf-8; name="attachment.txt"`) {
t.Errorf("Content-Type header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Transfer-Encoding: 7bit`) {
t.Errorf("Content-Transfer-Encoding header not found for attachment. Mail: %s", buffer.String())
}
})
t.Run("message with a single file attached custom description", func(t *testing.T) {
buffer := bytes.NewBuffer(nil)
msgwriter.writer = buffer
message := testMessage(t)
message.AttachFile("testdata/attachment.txt", WithFileDescription("Testdescription"))
msgwriter.writeMsg(message)
if msgwriter.err != nil {
t.Errorf("msgWriter failed to write: %s", msgwriter.err)
}
if !strings.Contains(buffer.String(), "\r\n\r\nVGhpcyBpcyBhIHRlc3QgYXR0YWNobWVudAo=") {
t.Errorf("attachment not found in mail message. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Disposition: attachment; filename="attachment.txt"`) {
t.Errorf("Content-Dispositon header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `text/plain; charset=utf-8; name="attachment.txt"`) {
t.Errorf("Content-Type header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Transfer-Encoding: base64`) {
t.Errorf("Content-Transfer-Encoding header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Description: Testdescription`) {
t.Errorf("Content-Description header not found for attachment. Mail: %s", buffer.String())
}
})
t.Run("message with attachment but no body part", func(t *testing.T) {
buffer := bytes.NewBuffer(nil)
msgwriter.writer = buffer
message := testMessage(t)
message.parts = nil
message.AttachFile("testdata/attachment.txt")
msgwriter.writeMsg(message)
if msgwriter.err != nil {
t.Errorf("msgWriter failed to write: %s", msgwriter.err)
}
if !strings.Contains(buffer.String(), "\r\n\r\nVGhpcyBpcyBhIHRlc3QgYXR0YWNobWVudAo=") {
t.Errorf("attachment not found in mail message. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Disposition: attachment; filename="attachment.txt"`) {
t.Errorf("Content-Dispositon header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `text/plain; charset=utf-8; name="attachment.txt"`) {
t.Errorf("Content-Type header not found for attachment. Mail: %s", buffer.String())
}
if !strings.Contains(buffer.String(), `Content-Transfer-Encoding: base64`) {
t.Errorf("Content-Transfer-Encoding header not found for attachment. Mail: %s", buffer.String())
}
})
}