From 2ce0b5a87bcadee5e4633c52ad44f75f42fa3263 Mon Sep 17 00:00:00 2001
From: nk2ge5k <nk2ge5k@gmail.com>
Date: Tue, 8 Nov 2022 00:15:01 +0400
Subject: [PATCH] reproduce issue #652

---
 openapi3/issue652_test.go                    | 29 ++++++++++++++++++++
 openapi3/testdata/issue652/definitions.yml   |  4 +++
 openapi3/testdata/issue652/nested/schema.yml |  4 +++
 3 files changed, 37 insertions(+)
 create mode 100644 openapi3/issue652_test.go
 create mode 100644 openapi3/testdata/issue652/definitions.yml
 create mode 100644 openapi3/testdata/issue652/nested/schema.yml

diff --git a/openapi3/issue652_test.go b/openapi3/issue652_test.go
new file mode 100644
index 000000000..f36e92005
--- /dev/null
+++ b/openapi3/issue652_test.go
@@ -0,0 +1,29 @@
+package openapi3_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/getkin/kin-openapi/openapi3"
+)
+
+func TestIssue652(t *testing.T) {
+	loader := openapi3.NewLoader()
+	loader.IsExternalRefsAllowed = true
+
+	// Test checks that no slice bounds out of range error occurs while loading
+	// from file that contains reference to file in the parent directory.
+	require.NotPanics(t, func() {
+		const schemaName = "ReferenceToParentDirectory"
+
+		spec, err := loader.LoadFromFile("testdata/issue652/nested/schema.yml")
+		require.NoError(t, err)
+		require.Contains(t, spec.Components.Schemas, schemaName)
+
+		schema := spec.Components.Schemas[schemaName]
+		assert.Equal(t, schema.Ref, "../definitions.yml#/components/schemas/TestSchema")
+		assert.Equal(t, schema.Value.Type, "string")
+	})
+}
diff --git a/openapi3/testdata/issue652/definitions.yml b/openapi3/testdata/issue652/definitions.yml
new file mode 100644
index 000000000..98ef69254
--- /dev/null
+++ b/openapi3/testdata/issue652/definitions.yml
@@ -0,0 +1,4 @@
+components:
+    schemas:
+        TestSchema:
+            type: string
diff --git a/openapi3/testdata/issue652/nested/schema.yml b/openapi3/testdata/issue652/nested/schema.yml
new file mode 100644
index 000000000..ef321a101
--- /dev/null
+++ b/openapi3/testdata/issue652/nested/schema.yml
@@ -0,0 +1,4 @@
+components:
+    schemas:
+        ReferenceToParentDirectory:
+            $ref: "../definitions.yml#/components/schemas/TestSchema"