feat(render): experimental package to render arbitrary values to different formats

yaml_test.go

@@ -0,0 +1,82 @@
+package render_test
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/jimeh/go-render"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestYAML_Render(t *testing.T) {
+	tests := []struct {
+		name      string
+		indent    int
+		value     interface{}
+		want      string
+		wantPanic string
+	}{
+		{
+			name:  "simple object default indent",
+			value: map[string]int{"age": 30},
+			want:  "age: 30\n",
+		},
+		{
+			name:   "nested structure",
+			indent: 0, // This will use the default indent of 2 spaces
+			value: map[string]any{
+				"user": map[string]any{
+					"age":  30,
+					"name": "John Doe",
+				},
+			},
+			want: "user:\n  age: 30\n  name: John Doe\n",
+		},
+		{
+			name:   "simple object custom indent",
+			indent: 4,
+			value: map[string]any{
+				"user": map[string]any{
+					"age":  30,
+					"name": "John Doe",
+				},
+			},
+			want: "user:\n    age: 30\n    name: John Doe\n",
+		},
+		{
+			name:      "invalid value",
+			indent:    0,
+			value:     make(chan int),
+			wantPanic: "cannot marshal type: chan int",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			j := &render.YAML{
+				Indent: tt.indent,
+			}
+
+			var buf bytes.Buffer
+			var err error
+			var panicRes any
+			func() {
+				defer func() {
+					if r := recover(); r != nil {
+						panicRes = r
+					}
+				}()
+				err = j.Render(&buf, tt.value)
+			}()
+
+			if tt.wantPanic != "" {
+				assert.Equal(t, tt.wantPanic, panicRes)
+			} else {
+				require.NoError(t, err)
+				got := buf.String()
+				assert.Equal(t, tt.want, got)
+			}
+		})
+	}
+}