The Merge function will not work properly if the map is nested

[hdw868]

Try following case and it will fail

package main

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestMergeMap(t *testing.T) {
	t.Run("case1", func(t *testing.T) {
		m1 := map[string]interface{}{
			"a": "1",
		}
		m2 := map[string]interface{}{
			"b": "2",
		}
		got := MergeMap(m1, m2)
		expect := map[string]interface{}{
			"a": "1",
			"b": "2",
		}
		assert.Equal(t, expect, got)
	})
	t.Run("case2", func(t *testing.T) {
		m1 := map[string]interface{}{
			"a": "1",
		}
		m2 := map[string]interface{}{
			"b": map[string]interface{}{
				"c": "2"},
		}
		m3 := map[string]interface{}{
			"b": map[string]interface{}{
				"d": "3"},
		}
		got := MergeMap(m1, m2, m3)
		expect := map[string]interface{}{
			"a": "1",
			"b": map[string]interface{}{
				"c": "2",
				"d": "3",
			},
		}
		assert.Equal(t, expect, got)
	})
}