From d3d0468955b9a7a9c9f36e4a568fed2d2b1c7ed3 Mon Sep 17 00:00:00 2001
From: Masaaki Goshima <goccy54@gmail.com>
Date: Mon, 23 Dec 2024 15:32:31 +0900
Subject: [PATCH] add test case

---
 yaml_test.go | 139 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 yaml_test.go

diff --git a/yaml_test.go b/yaml_test.go
new file mode 100644
index 0000000..d6d264c
--- /dev/null
+++ b/yaml_test.go
@@ -0,0 +1,139 @@
+package yaml_test
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/goccy/go-yaml"
+)
+
+func TestAutoAnchor(t *testing.T) {
+	var data = `
+a: &a [_,_,_,_,_,_,_,_,_,_,_,_,_,_,_]
+b: &b [*a,*a,*a,*a,*a,*a,*a,*a,*a,*a]
+c: &c [*b,*b,*b,*b,*b,*b,*b,*b,*b,*b]
+d: &d [*c,*c,*c,*c,*c,*c,*c,*c,*c,*c]
+e: &e [*d,*d,*d,*d,*d,*d,*d,*d,*d,*d]
+f: &f [*e,*e,*e,*e,*e,*e,*e,*e,*e,*e]
+g: &g [*f,*f,*f,*f,*f,*f,*f,*f,*f,*f]
+h: &h [*g,*g,*g,*g,*g,*g,*g,*g,*g,*g]
+i: &i [*h,*h,*h,*h,*h,*h,*h,*h,*h,*h]
+`
+	var v any
+	if err := yaml.Unmarshal([]byte(data), &v); err != nil {
+		t.Fatal(err)
+	}
+	got, err := yaml.MarshalWithOptions(v, yaml.UseAutoAnchor())
+	if err != nil {
+		t.Fatal(err)
+	}
+	expected := `
+a: &a
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+- _
+b: &b
+- *a
+- *a
+- *a
+- *a
+- *a
+- *a
+- *a
+- *a
+- *a
+- *a
+c: &c
+- *b
+- *b
+- *b
+- *b
+- *b
+- *b
+- *b
+- *b
+- *b
+- *b
+d: &d
+- *c
+- *c
+- *c
+- *c
+- *c
+- *c
+- *c
+- *c
+- *c
+- *c
+e: &e
+- *d
+- *d
+- *d
+- *d
+- *d
+- *d
+- *d
+- *d
+- *d
+- *d
+f: &f
+- *e
+- *e
+- *e
+- *e
+- *e
+- *e
+- *e
+- *e
+- *e
+- *e
+g: &g
+- *f
+- *f
+- *f
+- *f
+- *f
+- *f
+- *f
+- *f
+- *f
+- *f
+h: &h
+- *g
+- *g
+- *g
+- *g
+- *g
+- *g
+- *g
+- *g
+- *g
+- *g
+i:
+- *h
+- *h
+- *h
+- *h
+- *h
+- *h
+- *h
+- *h
+- *h
+- *h
+`
+	if strings.TrimPrefix(expected, "\n") != string(got) {
+		t.Fatalf("failed to encode: %s", string(got))
+	}
+}