diff --git a/data/document.go b/data/document.go
index 4fbabcac..ca52f7f5 100644
--- a/data/document.go
+++ b/data/document.go
@@ -37,6 +37,7 @@ func NewDocument(
 	thread threadmodels.Thread,
 	stateProvider InitialStateProvider,
 	accountData *AccountData) *Document {
+
 	decoder := threadmodels.NewEd25519Decoder()
 	return &Document{
 		thread:            thread,
diff --git a/data/document_test.go b/data/document_test.go
new file mode 100644
index 00000000..b3abc82b
--- /dev/null
+++ b/data/document_test.go
@@ -0,0 +1,28 @@
+package data
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/data/threadbuilder"
+)
+
+func TestDocument_Build(t *testing.T) {
+	thread, err := threadbuilder.NewThreadBuilderFromFile("threadbuilder/userjoinexample.yml")
+	if err != nil {
+		t.Fatal(err)
+	}
+	keychain := thread.GetKeychain()
+	accountData := &AccountData{
+		Identity: keychain.GetIdentity("A"),
+		EncKey:   keychain.EncryptionKeys["A"],
+	}
+	doc := NewDocument(thread, NewPlainTextDocumentStateProvider(), accountData)
+	res, err := doc.Build()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	st := res.(*PlainTextDocumentState)
+	assert.Equal(t, st.Text, "some text|first")
+}