Fix FromAddress parsing and add tests

fromaddress.go

@@ -2,7 +2,6 @@ package simplemail
 
 import (
 	"encoding"
-	"encoding/json"
 	"github.com/emersion/go-message/mail"
 )
 
@@ -13,12 +12,7 @@ type FromAddress struct {
 var _ encoding.TextUnmarshaler = &FromAddress{}
 
 func (f *FromAddress) UnmarshalText(b []byte) error {
-	var a string
+	address, err := mail.ParseAddress(string(b))
-	err := json.Unmarshal(b, &a)
-	if err != nil {
-		return err
-	}
-	address, err := mail.ParseAddress(a)
 	if err != nil {
 		return err
 	}

fromaddress_test.go

@@ -0,0 +1,23 @@
+package simplemail
+
+import (
+	"encoding/json"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestFromAddress_UnmarshalText(t *testing.T) {
+	t.Run("json", func(t *testing.T) {
+		var fromAddress FromAddress
+		assert.NoError(t, json.Unmarshal([]byte(`"Jane Doe <jane@example.com>"`), &fromAddress))
+		assert.Equal(t, "Jane Doe", fromAddress.Address.Name)
+		assert.Equal(t, "jane@example.com", fromAddress.Address.Address)
+	})
+	t.Run("yaml", func(t *testing.T) {
+		var fromAddress FromAddress
+		assert.NoError(t, yaml.Unmarshal([]byte(`"Jane Doe <jane@example.com>"`), &fromAddress))
+		assert.Equal(t, "Jane Doe", fromAddress.Address.Name)
+		assert.Equal(t, "jane@example.com", fromAddress.Address.Address)
+	})
+}

go.mod

@@ -7,4 +7,11 @@ require (
 	github.com/emersion/go-message v0.18.1
 	github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43
 	github.com/emersion/go-smtp v0.21.3
+	github.com/stretchr/testify v1.9.0
+	gopkg.in/yaml.v3 v3.0.1
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 )

go.sum

@@ -13,6 +13,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
@@ -44,5 +46,7 @@ golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=