golang formatting readable diff between two arbitrary types using console colors

diff.go

package diff

import (
	"bytes"
	"fmt"

	"github.com/davecgh/go-spew/spew"
	"github.com/sergi/go-diff/diffmatchpatch"
)

// FormatNotEqual pretty prints the diff between two instances for the console (using color)
func FormatNotEqual(expected, actual interface{}) string {
	spew.Config.SortKeys = true
	a := spew.Sdump(expected)
	b := spew.Sdump(actual)

	dmp := diffmatchpatch.New()
	diffs := dmp.DiffMain(a, b, false)

	var buff bytes.Buffer
	for _, diff := range diffs {
		switch diff.Type {
		case diffmatchpatch.DiffInsert:
			buff.WriteString("\x1b[102m[+")
			buff.WriteString(diff.Text)
			buff.WriteString("]\x1b[0m")
		case diffmatchpatch.DiffDelete:
			buff.WriteString("\x1b[101m[-")
			buff.WriteString(diff.Text)
			buff.WriteString("]\x1b[0m")
		case diffmatchpatch.DiffEqual:
			buff.WriteString(diff.Text)
		}
	}
	return fmt.Sprintf("%s", buff.String())
}

Nice one