fix(expand): fix missing tags in expanded spec

openapi/parser/_testdata/expand/info_tags.yaml

@@ -0,0 +1,11 @@
+openapi: 3.1.0
+info:
+  version: 1.0.0
+  title: info_test
+tags:
+  - name: Order
+    description: orders
+  - name: Invoice
+    description: invoices
+  - name: Product
+    description: products

openapi/parser/expand_test.go

@@ -0,0 +1,32 @@
+package parser_test
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/ogen-go/ogen"
+	"github.com/ogen-go/ogen/openapi/parser"
+)
+
+func TestExpand(t *testing.T) {
+	f, err := os.ReadFile("_testdata/expand/info_tags.yaml")
+	require.NoError(t, err)
+
+	spec, err := ogen.Parse(f)
+	require.NoError(t, err)
+	require.NotEmpty(t, spec.Tags)
+	require.Len(t, spec.Tags, 3)
+
+	api, err := parser.Parse(spec, parser.Settings{})
+	require.NoError(t, err)
+
+	expandSpec, err := parser.Expand(api)
+	require.NoError(t, err)
+
+	require.Equal(t, "info_test", expandSpec.Info.Title)
+	require.Equal(t, "1.0.0", expandSpec.Info.Version)
+	require.Empty(t, expandSpec.Info.Summary)
+	require.Len(t, expandSpec.Tags, 3)
+}

openapi/parser/parser.go

@@ -140,7 +140,16 @@ func Parse(spec *ogen.Spec, s Settings) (_ *openapi.API, rerr error) {
 		return nil, errors.Wrap(err, "parse webhooks")
 	}
 
+	tags := make([]openapi.Tag, len(spec.Tags))
+	for i, tag := range spec.Tags {
+		tags[i] = openapi.Tag{
+			Name:        tag.Name,
+			Description: tag.Description,
+		}
+	}
+
 	return &openapi.API{
+		Tags:       tags,
 		Version:    p.version,
 		Servers:    servers,
 		Operations: p.operations,