package mail import ( "bytes" "fmt" "io" "net/mail" "testing" "time" ) // TestNewMsg tests the NewMsg method func TestNewMsg(t *testing.T) { m := NewMsg() var err error if m.encoding != EncodingQP { err = fmt.Errorf("default encoding is not Quoted-Prinable") } if m.charset != CharsetUTF8 { err = fmt.Errorf("default charset is not UTF-8") } if err != nil { t.Errorf("NewMsg() failed: %s", err) return } } // TestNewMsgCharset tests WithCharset and Msg.SetCharset func TestNewMsgCharset(t *testing.T) { tests := []struct { name string value Charset want Charset }{ {"charset is UTF-7", CharsetUTF7, "UTF-7"}, {"charset is UTF-8", CharsetUTF8, "UTF-8"}, {"charset is US-ASCII", CharsetASCII, "US-ASCII"}, {"charset is ISO-8859-1", CharsetISO88591, "ISO-8859-1"}, {"charset is ISO-8859-2", CharsetISO88592, "ISO-8859-2"}, {"charset is ISO-8859-3", CharsetISO88593, "ISO-8859-3"}, {"charset is ISO-8859-4", CharsetISO88594, "ISO-8859-4"}, {"charset is ISO-8859-5", CharsetISO88595, "ISO-8859-5"}, {"charset is ISO-8859-6", CharsetISO88596, "ISO-8859-6"}, {"charset is ISO-8859-7", CharsetISO88597, "ISO-8859-7"}, {"charset is ISO-8859-9", CharsetISO88599, "ISO-8859-9"}, {"charset is ISO-8859-13", CharsetISO885913, "ISO-8859-13"}, {"charset is ISO-8859-14", CharsetISO885914, "ISO-8859-14"}, {"charset is ISO-8859-15", CharsetISO885915, "ISO-8859-15"}, {"charset is ISO-8859-16", CharsetISO885916, "ISO-8859-16"}, {"charset is ISO-2022-JP", CharsetISO2022JP, "ISO-2022-JP"}, {"charset is ISO-2022-KR", CharsetISO2022KR, "ISO-2022-KR"}, {"charset is windows-1250", CharsetWindows1250, "windows-1250"}, {"charset is windows-1251", CharsetWindows1251, "windows-1251"}, {"charset is windows-1252", CharsetWindows1252, "windows-1252"}, {"charset is windows-1255", CharsetWindows1255, "windows-1255"}, {"charset is windows-1256", CharsetWindows1256, "windows-1256"}, {"charset is KOI8-R", CharsetKOI8R, "KOI8-R"}, {"charset is KOI8-U", CharsetKOI8U, "KOI8-U"}, {"charset is Big5", CharsetBig5, "Big5"}, {"charset is GB18030", CharsetGB18030, "GB18030"}, {"charset is GB2312", CharsetGB2312, "GB2312"}, {"charset is TIS-620", CharsetTIS620, "TIS-620"}, {"charset is EUC-KR", CharsetEUCKR, "EUC-KR"}, {"charset is Shift_JIS", CharsetShiftJIS, "Shift_JIS"}, {"charset is GBK", CharsetGBK, "GBK"}, {"charset is Unknown", CharsetUnknown, "Unknown"}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m := NewMsg(WithCharset(tt.value), nil) if m.charset != tt.want { t.Errorf("WithCharset() failed. Expected: %s, got: %s", tt.want, m.charset) } m.SetCharset(CharsetUTF8) if m.charset != CharsetUTF8 { t.Errorf("SetCharset() failed. Expected: %s, got: %s", CharsetUTF8, m.charset) } m.SetCharset(tt.value) if m.charset != tt.want { t.Errorf("SetCharset() failed. Expected: %s, got: %s", tt.want, m.charset) } }) } } // TestNewMsgWithCharset tests WithEncoding and Msg.SetEncoding func TestNewMsgWithEncoding(t *testing.T) { tests := []struct { name string value Encoding want Encoding }{ {"encoding is Quoted-Printable", EncodingQP, "quoted-printable"}, {"encoding is Base64", EncodingB64, "base64"}, {"encoding is Unencoded 8-Bit", NoEncoding, "8bit"}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m := NewMsg(WithEncoding(tt.value)) if m.encoding != tt.want { t.Errorf("WithEncoding() failed. Expected: %s, got: %s", tt.want, m.encoding) } m.SetEncoding(NoEncoding) if m.encoding != NoEncoding { t.Errorf("SetEncoding() failed. Expected: %s, got: %s", NoEncoding, m.encoding) } m.SetEncoding(tt.want) if m.encoding != tt.want { t.Errorf("SetEncoding() failed. Expected: %s, got: %s", tt.want, m.encoding) } }) } } // TestNewMsgWithMIMEVersion tests WithMIMEVersion and Msg.SetMIMEVersion func TestNewMsgWithMIMEVersion(t *testing.T) { tests := []struct { name string value MIMEVersion want MIMEVersion }{ {"MIME version is 1.0", Mime10, "1.0"}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m := NewMsg(WithMIMEVersion(tt.value)) if m.mimever != tt.want { t.Errorf("WithMIMEVersion() failed. Expected: %s, got: %s", tt.want, m.mimever) } m.mimever = "" m.SetMIMEVersion(tt.value) if m.mimever != tt.want { t.Errorf("SetMIMEVersion() failed. Expected: %s, got: %s", tt.want, m.mimever) } }) } } // TestNewMsgWithBoundary tests WithBoundary and Msg.SetBoundary func TestNewMsgWithBoundary(t *testing.T) { tests := []struct { name string value string }{ {"boundary is test123", "test123"}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m := NewMsg(WithBoundary(tt.value)) if m.boundary != tt.value { t.Errorf("WithBoundary() failed. Expected: %s, got: %s", tt.value, m.boundary) } m.boundary = "" m.SetBoundary(tt.value) if m.boundary != tt.value { t.Errorf("SetBoundary() failed. Expected: %s, got: %s", tt.value, m.boundary) } }) } } // TestMsg_SetHEader tests Msg.SetHeader func TestMsg_SetHeader(t *testing.T) { tests := []struct { name string header Header values []string }{ {"set subject", HeaderSubject, []string{"This is Subject"}}, {"set content-language", HeaderContentLang, []string{"en", "de", "fr", "es"}}, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m := NewMsg() m.SetHeader(tt.header, tt.values...) if m.genHeader[tt.header] == nil { t.Errorf("SetHeader() failed. Tried to set header %s, but it is empty", tt.header) return } for _, v := range tt.values { found := false for _, hv := range m.genHeader[tt.header] { if hv == v { found = true } } if !found { t.Errorf("SetHeader() failed. Value %s not found in header field", v) } } }) } } // TestMsg_AddTo tests the Msg.AddTo method func TestMsg_AddTo(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} na := "address3@example.com" m := NewMsg() if err := m.To(a...); err != nil { t.Errorf("failed to set TO addresses: %s", err) return } if err := m.AddTo(na); err != nil { t.Errorf("AddTo failed: %s", err) return } atf := false for _, v := range m.addrHeader[HeaderTo] { if v.Address == na { atf = true } } if !atf { t.Errorf("AddTo() failed. Address %q not found in TO address slice.", na) } } // TestMsg_From tests the Msg.From and Msg.GetSender methods func TestMsg_From(t *testing.T) { a := "toni@example.com" n := "Toni Tester" na := fmt.Sprintf(`"%s" <%s>`, n, a) m := NewMsg() _, err := m.GetSender(false) if err == nil { t.Errorf("GetSender(false) without a set From address succeeded but was expected to fail") return } if err := m.From(na); err != nil { t.Errorf("failed to set FROM addresses: %s", err) return } gs, err := m.GetSender(false) if err != nil { t.Errorf("GetSender(false) failed: %s", err) return } if gs != a { t.Errorf("From() failed. Expected: %s, got: %s", a, gs) return } gs, err = m.GetSender(true) if err != nil { t.Errorf("GetSender(true) failed: %s", err) return } if gs != na { t.Errorf("From() failed. Expected: %s, got: %s", na, gs) return } } // TestMsg_AddToFormat tests the Msg.AddToFormat method func TestMsg_AddToFormat(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} nn := "Toni Tester" na := "address3@example.com" w := `"Toni Tester" ` m := NewMsg() if err := m.To(a...); err != nil { t.Errorf("failed to set TO addresses: %s", err) return } if err := m.AddToFormat(nn, na); err != nil { t.Errorf("AddToFormat failed: %s", err) return } atf := false for _, v := range m.addrHeader[HeaderTo] { if v.String() == w { atf = true } } if !atf { t.Errorf("AddToFormat() failed. Address %q not found in TO address slice.", w) } } // TestMsg_ToIgnoreInvalid tests the Msg.ToIgnoreInvalid method func TestMsg_ToIgnoreInvalid(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} fa := []string{"address1@example.com", "address2@example.com", "failedaddress.com"} m := NewMsg() m.ToIgnoreInvalid(a...) l := len(m.addrHeader[HeaderTo]) if l != len(a) { t.Errorf("ToIgnoreInvalid() failed. Expected %d addresses, got: %d", len(a), l) } m.ToIgnoreInvalid(fa...) l = len(m.addrHeader[HeaderTo]) if l != len(fa)-1 { t.Errorf("ToIgnoreInvalid() failed. Expected %d addresses, got: %d", len(fa)-1, l) } } // TestMsg_AddCc tests the Msg.AddCc method func TestMsg_AddCc(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} na := "address3@example.com" m := NewMsg() if err := m.Cc(a...); err != nil { t.Errorf("failed to set CC addresses: %s", err) return } if err := m.AddCc(na); err != nil { t.Errorf("AddCc failed: %s", err) return } atf := false for _, v := range m.addrHeader[HeaderCc] { if v.Address == na { atf = true } } if !atf { t.Errorf("AddCc() failed. Address %q not found in CC address slice.", na) } } // TestMsg_AddCcFormat tests the Msg.AddCcFormat method func TestMsg_AddCcFormat(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} nn := "Toni Tester" na := "address3@example.com" w := `"Toni Tester" ` m := NewMsg() if err := m.Cc(a...); err != nil { t.Errorf("failed to set CC addresses: %s", err) return } if err := m.AddCcFormat(nn, na); err != nil { t.Errorf("AddCcFormat failed: %s", err) return } atf := false for _, v := range m.addrHeader[HeaderCc] { if v.String() == w { atf = true } } if !atf { t.Errorf("AddCcFormat() failed. Address %q not found in CC address slice.", w) } } // TestMsg_CcIgnoreInvalid tests the Msg.CcIgnoreInvalid method func TestMsg_CcIgnoreInvalid(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} fa := []string{"address1@example.com", "address2@example.com", "failedaddress.com"} m := NewMsg() m.CcIgnoreInvalid(a...) l := len(m.addrHeader[HeaderCc]) if l != len(a) { t.Errorf("CcIgnoreInvalid() failed. Expected %d addresses, got: %d", len(a), l) } m.CcIgnoreInvalid(fa...) l = len(m.addrHeader[HeaderCc]) if l != len(fa)-1 { t.Errorf("CcIgnoreInvalid() failed. Expected %d addresses, got: %d", len(fa)-1, l) } } // TestMsg_AddBcc tests the Msg.AddBcc method func TestMsg_AddBcc(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} na := "address3@example.com" m := NewMsg() if err := m.Bcc(a...); err != nil { t.Errorf("failed to set BCC addresses: %s", err) return } if err := m.AddBcc(na); err != nil { t.Errorf("AddBcc failed: %s", err) return } atf := false for _, v := range m.addrHeader[HeaderBcc] { if v.Address == na { atf = true } } if !atf { t.Errorf("AddBcc() failed. Address %q not found in BCC address slice.", na) } } // TestMsg_AddBccFormat tests the Msg.AddBccFormat method func TestMsg_AddBccFormat(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} nn := "Toni Tester" na := "address3@example.com" w := `"Toni Tester" ` m := NewMsg() if err := m.Bcc(a...); err != nil { t.Errorf("failed to set BCC addresses: %s", err) return } if err := m.AddBccFormat(nn, na); err != nil { t.Errorf("AddBccFormat failed: %s", err) return } atf := false for _, v := range m.addrHeader[HeaderBcc] { if v.String() == w { atf = true } } if !atf { t.Errorf("AddBccFormat() failed. Address %q not found in BCC address slice.", w) } } // TestMsg_BccIgnoreInvalid tests the Msg.BccIgnoreInvalid method func TestMsg_BccIgnoreInvalid(t *testing.T) { a := []string{"address1@example.com", "address2@example.com"} fa := []string{"address1@example.com", "address2@example.com", "failedaddress.com"} m := NewMsg() m.BccIgnoreInvalid(a...) l := len(m.addrHeader[HeaderBcc]) if l != len(a) { t.Errorf("BccIgnoreInvalid() failed. Expected %d addresses, got: %d", len(a), l) } m.BccIgnoreInvalid(fa...) l = len(m.addrHeader[HeaderBcc]) if l != len(fa)-1 { t.Errorf("BccIgnoreInvalid() failed. Expected %d addresses, got: %d", len(fa)-1, l) } } // TestMsg_SetBulk tests the Msg.SetBulk method func TestMsg_SetBulk(t *testing.T) { m := NewMsg() m.SetBulk() if m.genHeader[HeaderPrecedence] == nil { t.Errorf("SetBulk() failed. Precedence header is nil") return } if m.genHeader[HeaderPrecedence][0] != "bulk" { t.Errorf("SetBulk() failed. Expected %q, got: %q", "bulk", m.genHeader[HeaderPrecedence][0]) } } // TestMsg_SetDate tests the Msg.SetDate and Msg.SetDateWithValue method func TestMsg_SetDate(t *testing.T) { m := NewMsg() m.SetDate() if m.genHeader[HeaderDate] == nil { t.Errorf("SetDate() failed. Date header is nil") return } d, ok := m.genHeader[HeaderDate] if !ok { t.Errorf("failed to get date header") return } _, err := time.Parse(time.RFC1123Z, d[0]) if err != nil { t.Errorf("failed to parse time in date header: %s", err) } m.genHeader = nil m.genHeader = make(map[Header][]string) now := time.Now() m.SetDateWithValue(now) if m.genHeader[HeaderDate] == nil { t.Errorf("SetDateWithValue() failed. Date header is nil") return } d, ok = m.genHeader[HeaderDate] if !ok { t.Errorf("failed to get date header") return } pt, err := time.Parse(time.RFC1123Z, d[0]) if err != nil { t.Errorf("failed to parse time in date header: %s", err) } if pt.Unix() != now.Unix() { t.Errorf("SetDateWithValue() failed. Expected time: %d, got: %d", now.Unix(), pt.Unix()) } } // TestMsg_SetMessageIDWIthValue tests the Msg.SetMessageIDWithValue and Msg.SetMessageID methods func TestMsg_SetMessageIDWithValue(t *testing.T) { m := NewMsg() m.SetMessageID() if m.genHeader[HeaderMessageID] == nil { t.Errorf("SetMessageID() failed. MessageID header is nil") return } if m.genHeader[HeaderMessageID][0] == "" { t.Errorf("SetMessageID() failed. Expected value, got: empty") return } m.genHeader[HeaderMessageID] = nil v := "This.is.a.message.id" vf := "" m.SetMessageIDWithValue(v) if m.genHeader[HeaderMessageID] == nil { t.Errorf("SetMessageIDWithValue() failed. MessageID header is nil") return } if m.genHeader[HeaderMessageID][0] != vf { t.Errorf("SetMessageIDWithValue() failed. Expected: %s, got: %s", vf, m.genHeader[HeaderMessageID][0]) return } } // TestMsg_FromFormat tests the FromFormat() method for the Msg object func TestMsg_FromFormat(t *testing.T) { tests := []struct { tname string name string addr string want string fail bool }{ {"valid name and addr", "Toni Tester", "tester@example.com", `"Toni Tester" `, false}, {"no name with valid addr", "", "tester@example.com", ``, false}, {"valid name with invalid addr", "Toni Tester", "@example.com", ``, true}, } m := NewMsg() for _, tt := range tests { t.Run(tt.tname, func(t *testing.T) { if err := m.FromFormat(tt.name, tt.addr); err != nil && !tt.fail { t.Errorf("failed to FromFormat(): %s", err) return } var fa *mail.Address f, ok := m.addrHeader[HeaderFrom] if ok && len(f) > 0 { fa = f[0] } if (!ok || len(f) == 0) && !tt.fail { t.Errorf(`valid from address expected, but "From:" field is empty`) return } if tt.fail && len(f) > 0 { t.Errorf("FromFormat() was supposed to failed but got value: %s", fa.String()) return } if !tt.fail && fa.String() != tt.want { t.Errorf("wrong result for FromFormat(). Want: %s, got: %s", tt.want, fa.String()) } m.addrHeader[HeaderFrom] = nil }) } } func TestMsg_GetRecipients(t *testing.T) { a := []string{"to@example.com", "cc@example.com", "bcc@example.com"} m := NewMsg() _, err := m.GetRecipients() if err == nil { t.Errorf("GetRecipients() succeeded but was expected to fail") return } if err := m.AddTo(a[0]); err != nil { t.Errorf("AddTo() failed: %s", err) return } if err := m.AddCc(a[1]); err != nil { t.Errorf("AddCc() failed: %s", err) return } if err := m.AddBcc(a[2]); err != nil { t.Errorf("AddBcc() failed: %s", err) return } al, err := m.GetRecipients() if err != nil { t.Errorf("GetRecipients() failed: %s", err) return } var tf, cf, bf = false, false, false for _, r := range al { if r == a[0] { tf = true } if r == a[1] { cf = true } if r == a[2] { bf = true } } if !tf { t.Errorf("GetRecipients() failed. Expected to address %s but was not found", a[0]) return } if !cf { t.Errorf("GetRecipients() failed. Expected cc address %s but was not found", a[1]) return } if !bf { t.Errorf("GetRecipients() failed. Expected bcc address %s but was not found", a[2]) return } } // TestMsg_ReplyTo tests the Msg.ReplyTo and Msg.ReplyToFormat methods func TestMsg_ReplyTo(t *testing.T) { tests := []struct { tname string name string addr string want string sf bool }{ {"valid name and addr", "Toni Tester", "tester@example.com", `"Toni Tester" `, false}, {"no name with valid addr", "", "tester@example.com", ``, false}, {"valid name with invalid addr", "Toni Tester", "@example.com", ``, true}, } m := NewMsg() for _, tt := range tests { t.Run(tt.tname, func(t *testing.T) { if err := m.ReplyTo(tt.want); err != nil && !tt.sf { t.Errorf("ReplyTo() method failed: %s", err) } if !tt.sf { rt, ok := m.genHeader[HeaderReplyTo] if !ok { t.Errorf("ReplyTo() failed: ReplyTo generic header not set") return } if len(rt) <= 0 { t.Errorf("ReplyTo() failed: length of generic ReplyTo header is zero or less than zero") return } if rt[0] != tt.want { t.Errorf("ReplyTo() failed: expected value: %s, got: %s", tt.want, rt[0]) } } m.genHeader = nil m.genHeader = make(map[Header][]string) if err := m.ReplyToFormat(tt.name, tt.addr); err != nil && !tt.sf { t.Errorf("ReplyToFormat() method failed: %s", err) } if !tt.sf { rt, ok := m.genHeader[HeaderReplyTo] if !ok { t.Errorf("ReplyTo() failed: ReplyTo generic header not set") return } if len(rt) <= 0 { t.Errorf("ReplyTo() failed: length of generic ReplyTo header is zero or less than zero") return } if rt[0] != tt.want { t.Errorf("ReplyTo() failed: expected value: %s, got: %s", tt.want, rt[0]) } } m.genHeader = nil m.genHeader = make(map[Header][]string) }) } } // TestMsg_Subject tests the Msg.Subject method func TestMsg_Subject(t *testing.T) { tests := []struct { name string sub string want string }{ {"normal subject", "This is a test subject", "This is a test subject"}, {"subject with umlauts", "This is a test subject with umlauts: üäöß", "=?UTF-8?q?This_is_a_test_subject_with_umlauts:_=C3=BC=C3=A4=C3=B6=C3=9F?="}, {"subject with emoji", "This is a test subject with emoji: 📧", "=?UTF-8?q?This_is_a_test_subject_with_emoji:_=F0=9F=93=A7?="}, } m := NewMsg() for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m.Subject(tt.sub) s, ok := m.genHeader[HeaderSubject] if !ok || len(s) <= 0 { t.Errorf("Subject() method failed. Generic header for Subject is empty") return } if s[0] != tt.want { t.Errorf("Subject() method failed. Expected: %s, got: %s", tt.want, s[0]) } }) } } // TestMsg_SetImportance tests the Msg.SetImportance method func TestMsg_SetImportance(t *testing.T) { tests := []struct { name string imp Importance wantns string xprio string want string sf bool }{ {"Importance: Non-Urgent", ImportanceNonUrgent, "0", "5", "non-urgent", false}, {"Importance: Low", ImportanceLow, "0", "5", "low", false}, {"Importance: Normal", ImportanceNormal, "", "", "", true}, {"Importance: High", ImportanceHigh, "1", "1", "high", false}, {"Importance: Urgent", ImportanceUrgent, "1", "1", "urgent", false}, {"Importance: Unknown", 9, "", "", "", true}, } m := NewMsg() for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m.SetImportance(tt.imp) hi, ok := m.genHeader[HeaderImportance] if (!ok || len(hi) <= 0) && !tt.sf { t.Errorf("SetImportance() method failed. Generic header for Importance is empty") } hp, ok := m.genHeader[HeaderPriority] if (!ok || len(hp) <= 0) && !tt.sf { t.Errorf("SetImportance() method failed. Generic header for Priority is empty") } hx, ok := m.genHeader[HeaderXPriority] if (!ok || len(hx) <= 0) && !tt.sf { t.Errorf("SetImportance() method failed. Generic header for X-Priority is empty") } hm, ok := m.genHeader[HeaderXMSMailPriority] if (!ok || len(hm) <= 0) && !tt.sf { t.Errorf("SetImportance() method failed. Generic header for X-MS-XPriority is empty") } if !tt.sf { if hi[0] != tt.want { t.Errorf("SetImportance() method failed. Expected Imporance: %s, got: %s", tt.want, hi[0]) } if hp[0] != tt.wantns { t.Errorf("SetImportance() method failed. Expected Priority: %s, got: %s", tt.want, hp[0]) } if hx[0] != tt.xprio { t.Errorf("SetImportance() method failed. Expected X-Priority: %s, got: %s", tt.want, hx[0]) } if hm[0] != tt.wantns { t.Errorf("SetImportance() method failed. Expected X-MS-Priority: %s, got: %s", tt.wantns, hm[0]) } } m.genHeader = nil m.genHeader = make(map[Header][]string) }) } } // TestMsg_SetOrganization tests the Msg.SetOrganization method func TestMsg_SetOrganization(t *testing.T) { tests := []struct { name string org string }{ {"Org: testcorp", "testcorp"}, } m := NewMsg() for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m.SetOrganization(tt.org) o, ok := m.genHeader[HeaderOrganization] if !ok || len(o) <= 0 { t.Errorf("SetOrganization() method failed. Generic header for Organization is empty") return } if o[0] != tt.org { t.Errorf("SetOrganization() method failed. Expected: %s, got: %s", tt.org, o[0]) } }) } } // TestMsg_SetUserAgent tests the Msg.SetUserAgent method func TestMsg_SetUserAgent(t *testing.T) { tests := []struct { name string ua string }{ {"UA: Testmail 1.0", "Testmailer 1.0"}, } m := NewMsg() for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m.SetUserAgent(tt.ua) xm, ok := m.genHeader[HeaderXMailer] if !ok || len(xm) <= 0 { t.Errorf("SetUserAgent() method failed. Generic header for X-Mailer is empty") return } ua, ok := m.genHeader[HeaderUserAgent] if !ok || len(ua) <= 0 { t.Errorf("SetUserAgent() method failed. Generic header for UserAgent is empty") return } if xm[0] != tt.ua { t.Errorf("SetUserAgent() method failed. Expected X-Mailer: %s, got: %s", tt.ua, xm[0]) } if ua[0] != tt.ua { t.Errorf("SetUserAgent() method failed. Expected User-Agent: %s, got: %s", tt.ua, ua[0]) } }) } } // TestMsg_SetBodyString tests the Msg.SetBodyString method func TestMsg_SetBodyString(t *testing.T) { tests := []struct { name string ct ContentType value string want string sf bool }{ {"Body: test", TypeTextPlain, "test", "test", false}, {"Body: with Umlauts", TypeTextHTML, "üäöß", "üäöß", false}, {"Body: with emoji", TypeTextPlain, "📧", "📧", false}, } m := NewMsg() for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m.SetBodyString(tt.ct, tt.value) if len(m.parts) != 1 { t.Errorf("SetBodyString() failed: no mail parts found") } part := m.parts[0] res := bytes.Buffer{} if err := part.w(&res); err != nil && !tt.sf { t.Errorf("WriteFunc of part failed: %s", err) } if res.String() != tt.want { t.Errorf("SetBodyString() failed. Expecteding: %s, got: %s", tt.want, res.String()) } }) } } // TestMsg_AddAlternativeString tests the Msg.AddAlternativeString method func TestMsg_AddAlternativeString(t *testing.T) { tests := []struct { name string value string want string sf bool }{ {"Body: test", "test", "test", false}, {"Body: with Umlauts", "üäöß", "üäöß", false}, {"Body: with emoji", "📧", "📧", false}, } m := NewMsg() for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m.SetBodyString(TypeTextPlain, tt.value) if len(m.parts) != 1 { t.Errorf("AddAlternativeString() => SetBodyString() failed: no mail parts found") } m.AddAlternativeString(TypeTextHTML, tt.value) if len(m.parts) != 2 { t.Errorf("AddAlternativeString() failed: no alternative mail parts found") } apart := m.parts[1] res := bytes.Buffer{} if err := apart.w(&res); err != nil && !tt.sf { t.Errorf("WriteFunc of part failed: %s", err) } if res.String() != tt.want { t.Errorf("AddAlternativeString() failed. Expecteding: %s, got: %s", tt.want, res.String()) } }) } } // TestMsg_AttachFile tests the Msg.AttachFile and the WithFilename FileOption method func TestMsg_AttachFile(t *testing.T) { tests := []struct { name string file string fn string sf bool }{ {"File: README.md", "README.md", "README.md", false}, {"File: doc.go", "doc.go", "foo.go", false}, {"File: nonexisting", "", "invalid.file", true}, } m := NewMsg() for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { m.AttachFile(tt.file, WithFileName(tt.fn), nil) if len(m.attachments) != 1 && !tt.sf { t.Errorf("AttachFile() failed. Number of attachments expected: %d, got: %d", 1, len(m.attachments)) return } if !tt.sf { file := m.attachments[0] if file == nil { t.Errorf("AttachFile() failed. Attachment file pointer is nil") return } if file.Name != tt.fn { t.Errorf("AttachFile() failed. Filename of attachment expected: %s, got: %s", tt.fn, file.Name) } buf := bytes.Buffer{} if err := file.Writer(&buf); err != nil { t.Errorf("failed to execute WriterFunc: %s", err) return } } m.Reset() }) } } // TestMsg_AttachFileBrokenFunc tests WriterFunc of the Msg.AttachFile method func TestMsg_AttachFileBrokenFunc(t *testing.T) { m := NewMsg() m.AttachFile("README.md") if len(m.attachments) != 1 { t.Errorf("AttachFile() failed. Number of attachments expected: %d, got: %d", 1, len(m.attachments)) return } file := m.attachments[0] if file == nil { t.Errorf("AttachFile() failed. Attachment file pointer is nil") return } file.Writer = func(io.Writer) error { return fmt.Errorf("failing intentionally") } buf := bytes.Buffer{} if err := file.Writer(&buf); err == nil { t.Errorf("execute WriterFunc did not fail, but was expected to fail") } }