bump: upgrade gopkg.in/yaml.v2 to gopkg.in/yaml.v3

Signed-off-by: yxxhero <aiopsclub@163.com>

pkg/maputil/yamlutil.go

@@ -0,0 +1,18 @@
+package maputil
+
+import (
+	"bytes"
+
+	"gopkg.in/yaml.v3"
+)
+
+func YamlMarshal(v interface{}) ([]byte, error) {
+	var b bytes.Buffer
+	yamlEncoder := yaml.NewEncoder(&b)
+	yamlEncoder.SetIndent(2)
+	err := yamlEncoder.Encode(v)
+	defer func() {
+		_ = yamlEncoder.Close()
+	}()
+	return b.Bytes(), err
+}

pkg/maputil/yamlutil_test.go

@@ -0,0 +1,34 @@
+package maputil
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestYamlMarshal(t *testing.T) {
+	tests := []struct {
+		Name string `yaml:"name"`
+		Info []struct {
+			Age     int    `yaml:"age"`
+			Address string `yaml:"address"`
+		} `yaml:"info"`
+
+		expected string
+	}{
+		{
+			Name: "John",
+			Info: []struct {
+				Age     int    `yaml:"age"`
+				Address string `yaml:"address"`
+			}{{Age: 20, Address: "New York"}},
+			expected: "name: John\ninfo:\n  - age: 20\n    address: New York\n",
+		},
+	}
+
+	for _, tt := range tests {
+		actual, err := YamlMarshal(tt)
+		require.NoError(t, err)
+		require.Equal(t, tt.expected, string(actual))
+	}
+}