full header in asciidoc formatter

adoc.go

@@ -10,7 +10,6 @@ type ADoc struct {
 	Title      string
 	Attributes map[string]string
 	Author     string
-	Path       string
 	Date       time.Time
 	Content    []element.Element
 }

format/asciidoc.go

@@ -13,6 +13,12 @@ func AsciiDoc(doc *adoc.ADoc) string {
 
 func AsciiDocHeader(doc *adoc.ADoc) string {
 	header := fmt.Sprintf("= %s\n", doc.Title)
+	if doc.Author != "" {
+		header += fmt.Sprintf("%s\n", doc.Author)
+	}
+	if !doc.Date.IsZero() {
+		header += fmt.Sprintf("%s\n", doc.Date.Format("2006-01-02"))
+	}
 	for k, v := range doc.Attributes {
 		header += fmt.Sprintf(":%s: %s\n", k, v)
 	}

format/asciidoc_test.go

@@ -3,7 +3,9 @@ package format_test
 import (
 	"strings"
 	"testing"
+	"time"
 
+	"ewintr.nl/adoc"
 	"ewintr.nl/adoc/element"
 	"ewintr.nl/adoc/format"
 	"ewintr.nl/adoc/parser"
@@ -23,6 +25,26 @@ With some text.
 	test.Equals(t, input, format.AsciiDoc(doc))
 }
 
+func TestAsciiDocHeader(t *testing.T) {
+	input := &adoc.ADoc{
+		Title:  "title",
+		Author: "author",
+		Date:   time.Date(2022, time.Month(6), 11, 12, 0, 0, 0, time.UTC),
+		Attributes: map[string]string{
+			"key1": "value 1",
+			"key2": "value 2",
+		},
+	}
+	exp := `= title
+author
+2022-06-11
+:key1: value 1
+:key2: value 2
+`
+
+	test.Equals(t, exp, format.AsciiDocHeader(input))
+}
+
 func TestAsciiDocFragment(t *testing.T) {
 	for _, tc := range []struct {
 		name  string