mirror of
https://github.com/wneessen/go-mail.git
synced 2024-11-12 17:02:55 +01:00
Winni Neessen
52ef13a5d5
The content print statement in eml.go was removed to optimize code readability and performance. In addition, several assertions in the test cases of eml_test.go were corrected for string formatting errors and a new test case was added for handling emails with attachments. These changes aim to enhance the robustness of tests for email encoding and decoding operations.
295 lines
9.4 KiB
Go
295 lines
9.4 KiB
Go
// SPDX-FileCopyrightText: 2022-2023 The go-mail Authors
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//
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// SPDX-License-Identifier: MIT
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package mail
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import (
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"fmt"
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"os"
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"strings"
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"testing"
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"time"
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)
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const (
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exampleMailPlainNoEnc = `Date: Wed, 01 Nov 2023 00:00:00 +0000
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MIME-Version: 1.0
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Message-ID: <1305604950.683004066175.AAAAAAAAaaaaaaaaB@go-mail.dev>
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Subject: Example mail // plain text without encoding
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User-Agent: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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X-Mailer: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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From: "Toni Tester" <go-mail@go-mail.dev>
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To: <go-mail+test@go-mail.dev>
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Cc: <go-mail+cc@go-mail.dev>
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Dear Customer,
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This is a test mail. Please do not reply to this. Also this line is very long so it
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should be wrapped.
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Thank your for your business!
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The go-mail team
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--
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This is a signature`
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exampleMailPlainNoEncInvalidDate = `Date: Inv, 99 Nov 9999 99:99:00 +0000
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MIME-Version: 1.0
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Message-ID: <1305604950.683004066175.AAAAAAAAaaaaaaaaB@go-mail.dev>
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Subject: Example mail // plain text without encoding
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User-Agent: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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X-Mailer: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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From: "Toni Tester" <go-mail@go-mail.dev>
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To: <go-mail+test@go-mail.dev>
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Cc: <go-mail+cc@go-mail.dev>
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Dear Customer,
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This is a test mail. Please do not reply to this. Also this line is very long so it
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should be wrapped.
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Thank your for your business!
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The go-mail team
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--
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This is a signature`
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exampleMailPlainNoEncNoDate = `MIME-Version: 1.0
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Message-ID: <1305604950.683004066175.AAAAAAAAaaaaaaaaB@go-mail.dev>
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Subject: Example mail // plain text without encoding
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User-Agent: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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X-Mailer: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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From: "Toni Tester" <go-mail@go-mail.dev>
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To: <go-mail+test@go-mail.dev>
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Cc: <go-mail+cc@go-mail.dev>
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Dear Customer,
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This is a test mail. Please do not reply to this. Also this line is very long so it
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should be wrapped.
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Thank your for your business!
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The go-mail team
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--
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This is a signature`
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exampleMailPlainQP = `Date: Wed, 01 Nov 2023 00:00:00 +0000
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MIME-Version: 1.0
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Message-ID: <1305604950.683004066175.AAAAAAAAaaaaaaaaB@go-mail.dev>
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Subject: Example mail // plain text quoted-printable
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User-Agent: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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X-Mailer: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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From: "Toni Tester" <go-mail@go-mail.dev>
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To: <go-mail+test@go-mail.dev>
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Cc: <go-mail+cc@go-mail.dev>
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: quoted-printable
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Dear Customer,
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This is a test mail. Please do not reply to this. Also this line is very lo=
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ng so it
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should be wrapped.
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Thank your for your business!
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The go-mail team
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--
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This is a signature`
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exampleMailPlainB64 = `Date: Wed, 01 Nov 2023 00:00:00 +0000
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MIME-Version: 1.0
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Message-ID: <1305604950.683004066175.AAAAAAAAaaaaaaaaB@go-mail.dev>
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Subject: Example mail // plain text base64
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User-Agent: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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X-Mailer: go-mail v0.4.0 // https://github.com/wneessen/go-mail
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From: "Toni Tester" <go-mail@go-mail.dev>
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To: <go-mail+test@go-mail.dev>
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Cc: <go-mail+cc@go-mail.dev>
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: base64
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RGVhciBDdXN0b21lciwKClRoaXMgaXMgYSB0ZXN0IG1haWwuIFBsZWFzZSBkbyBub3QgcmVwbHkg
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dG8gdGhpcy4gQWxzbyB0aGlzIGxpbmUgaXMgdmVyeSBsb25nIHNvIGl0CnNob3VsZCBiZSB3cmFw
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cGVkLgoKClRoYW5rIHlvdXIgZm9yIHlvdXIgYnVzaW5lc3MhClRoZSBnby1tYWlsIHRlYW0KCi0t
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ClRoaXMgaXMgYSBzaWduYXR1cmU=`
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exampleMailPlainB64WithAttachment = `Date: Wed, 01 Nov 2023 00:00:00 +0000
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MIME-Version: 1.0
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Message-ID: <1305604950.683004066175.AAAAAAAAaaaaaaaaB@go-mail.dev>
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Subject: Example mail // plain text base64 with attachment
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User-Agent: go-mail v0.4.1 // https://github.com/wneessen/go-mail
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X-Mailer: go-mail v0.4.1 // https://github.com/wneessen/go-mail
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From: "Toni Tester" <go-mail@go-mail.dev>
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To: <go-mail+test@go-mail.dev>
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Cc: <go-mail+cc@go-mail.dev>
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Content-Type: multipart/mixed;
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boundary=45c75ff528359022eb03679fbe91877d75343f2e1f8193e349deffa33ff7
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--45c75ff528359022eb03679fbe91877d75343f2e1f8193e349deffa33ff7
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Content-Transfer-Encoding: base64
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Content-Type: text/plain; charset=UTF-8
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RGVhciBDdXN0b21lciwKClRoaXMgaXMgYSB0ZXN0IG1haWwuIFBsZWFzZSBkbyBub3QgcmVwbHkg
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dG8gdGhpcy4gQWxzbyB0aGlzIGxpbmUgaXMgdmVyeSBsb25nIHNvIGl0CnNob3VsZCBiZSB3cmFw
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cGVkLgoKClRoYW5rIHlvdXIgZm9yIHlvdXIgYnVzaW5lc3MhClRoZSBnby1tYWlsIHRlYW0KCi0t
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ClRoaXMgaXMgYSBzaWduYXR1cmU=
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--45c75ff528359022eb03679fbe91877d75343f2e1f8193e349deffa33ff7
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Content-Disposition: attachment; filename="test.attachment"
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Content-Transfer-Encoding: base64
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Content-Type: application/octet-stream; name="test.attachment"
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VGhpcyBpcyBhIHNpbXBsZSB0ZXN0IHRleHQgZmlsZSBhdHRhY2htZW50LgoKSXQgCiAgaGFzCiAg
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ICAgc2V2ZXJhbAogICAgICAgICAgICBuZXdsaW5lcwoJICAgICAgICAgICAgYW5kCgkgICAgc3Bh
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Y2VzCiAgICAgaW4KICBpdAouCgpBcyB3ZWxsIGFzIGFuIGVtb2ppOiDwn5mCCg==
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--45c75ff528359022eb03679fbe91877d75343f2e1f8193e349deffa33ff7--`
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)
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func TestEMLToMsgFromString(t *testing.T) {
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tests := []struct {
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name string
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eml string
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enc string
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sub string
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}{
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{
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"Plain text no encoding", exampleMailPlainNoEnc, "8bit",
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"Example mail // plain text without encoding",
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},
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{
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"Plain text quoted-printable", exampleMailPlainQP, "quoted-printable",
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"Example mail // plain text quoted-printable",
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},
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{
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"Plain text base64", exampleMailPlainB64, "base64",
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"Example mail // plain text base64",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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msg, err := EMLToMsgFromString(tt.eml)
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if err != nil {
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t.Errorf("failed to parse EML: %s", err)
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}
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if msg.Encoding() != tt.enc {
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t.Errorf("EMLToMsgFromString failed: expected encoding: %s, but got: %s", tt.enc, msg.Encoding())
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}
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if subject := msg.GetGenHeader(HeaderSubject); len(subject) > 0 && !strings.EqualFold(subject[0], tt.sub) {
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t.Errorf("EMLToMsgFromString failed: expected subject: %s, but got: %s",
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tt.sub, subject[0])
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}
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})
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}
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}
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func TestEMLToMsgFromFile(t *testing.T) {
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tests := []struct {
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name string
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eml string
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enc string
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sub string
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}{
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{
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"Plain text no encoding", exampleMailPlainNoEnc, "8bit",
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"Example mail // plain text without encoding",
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},
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{
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"Plain text quoted-printable", exampleMailPlainQP, "quoted-printable",
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"Example mail // plain text quoted-printable",
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},
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{
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"Plain text base64", exampleMailPlainB64, "base64",
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"Example mail // plain text base64",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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tempDir, err := os.MkdirTemp("", fmt.Sprintf("*-%s", tt.name))
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if err != nil {
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t.Errorf("failed to create temp dir: %s", err)
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return
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}
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defer func() {
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if err = os.RemoveAll(tempDir); err != nil {
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t.Error("failed to remove temp dir:", err)
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}
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}()
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err = os.WriteFile(fmt.Sprintf("%s/%s.eml", tempDir, tt.name), []byte(tt.eml), 0666)
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if err != nil {
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t.Error("failed to write mail to temp file:", err)
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return
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}
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msg, err := EMLToMsgFromFile(fmt.Sprintf("%s/%s.eml", tempDir, tt.name))
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if err != nil {
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t.Errorf("failed to parse EML: %s", err)
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}
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if msg.Encoding() != tt.enc {
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t.Errorf("EMLToMsgFromString failed: expected encoding: %s, but got: %s", tt.enc, msg.Encoding())
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}
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if subject := msg.GetGenHeader(HeaderSubject); len(subject) > 0 && !strings.EqualFold(subject[0], tt.sub) {
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t.Errorf("EMLToMsgFromString failed: expected subject: %s, but got: %s",
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tt.sub, subject[0])
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}
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})
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}
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}
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func TestEMLToMsgFromStringBrokenDate(t *testing.T) {
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_, err := EMLToMsgFromString(exampleMailPlainNoEncInvalidDate)
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if err == nil {
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t.Error("EML with invalid date was supposed to fail, but didn't")
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}
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now := time.Now()
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m, err := EMLToMsgFromString(exampleMailPlainNoEncNoDate)
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if err != nil {
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t.Errorf("EML with no date parsing failed: %s", err)
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}
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da := m.GetGenHeader(HeaderDate)
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if len(da) < 1 {
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t.Error("EML with no date expected current date, but got nothing")
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return
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}
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d := da[0]
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if d != now.Format(time.RFC1123Z) {
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t.Errorf("EML with no date expected: %s, got: %s", now.Format(time.RFC1123Z), d)
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}
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}
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func TestEMLToMsgFromStringWithAttachment(t *testing.T) {
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wantSubject := "Example mail // plain text base64 with attachment"
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msg, err := EMLToMsgFromString(exampleMailPlainB64WithAttachment)
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if err != nil {
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t.Errorf("EML with attachment failed: %s", err)
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}
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if subject := msg.GetGenHeader(HeaderSubject); len(subject) > 0 && !strings.EqualFold(subject[0], wantSubject) {
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t.Errorf("EMLToMsgFromString of EML with attachment failed: expected subject: %s, but got: %s",
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wantSubject, subject[0])
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}
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if len(msg.attachments) != 1 {
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t.Errorf("EMLToMsgFromString of EML with attachment failed: expected no. of attachments: %d, but got: %d",
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1, len(msg.attachments))
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}
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contentTypeHeader := msg.GetGenHeader(HeaderContentType)
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if len(contentTypeHeader) != 1 {
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t.Errorf("EMLToMsgFromString of EML with attachment failed: expected no. of content-type header: %d, "+
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"but got: %d", 1, len(contentTypeHeader))
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}
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contentTypeSplit := strings.SplitN(contentTypeHeader[0], "; ", 2)
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if len(contentTypeSplit) != 2 {
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t.Error("failed to split Content-Type header")
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return
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}
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if !strings.EqualFold(contentTypeSplit[0], "multipart/mixed") {
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t.Errorf("EMLToMsgFromString of EML with attachment failed: expected content-type: %s, "+
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"but got: %s", "multipart/mixed", contentTypeSplit[0])
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}
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}
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