fix: example ref to schemas cause error

openapi3/loader.go

@@ -683,6 +683,23 @@ func (loader *Loader) resolveResponseRef(doc *T, component *ResponseRef, documen
 		sort.Strings(examples)
 		for _, name := range examples {
 			example := contentType.Examples[name]
+			if exampleRef := example.Ref; strings.HasPrefix(exampleRef, "#/components/schemas") {
+				parsedUrl, err := url.Parse(exampleRef)
+				if err != nil {
+					return err
+				}
+				var resolved SchemaRef
+				_, err = loader.resolveComponent(doc, exampleRef, parsedUrl, &resolved)
+				if err != nil {
+					return err
+				}
+				contentType.Examples[name] = &ExampleRef{
+					Ref:   exampleRef,
+					Value: NewExample(resolved.Value),
+				}
+				continue
+
+			}
 			if err := loader.resolveExampleRef(doc, example, documentPath); err != nil {
 				return err
 			}

openapi3/loader_exmaple_schema_ref_test.go

@@ -0,0 +1,20 @@
+package openapi3
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestLoadSpecWithExampleRefToSchemas(t *testing.T) {
+	loader := NewLoader()
+	doc, err := loader.LoadFromFile("testdata/example-schemas-ref.json")
+	require.NoError(t, err)
+
+	err = doc.Validate(loader.Context)
+	require.NoError(t, err)
+	exampleValue := doc.Paths["/pet"].Put.Responses.Get(400).Value.Content.Get("*/*").Examples["200"].Value.Value
+	schemaRef := doc.Components.Schemas["Pet"].Value
+	require.Equal(t, exampleValue, schemaRef)
+	require.NoError(t, err)
+}