package mergo_test import ( "reflect" "testing" "github.com/imdario/mergo" ) func TestIssue61MergeNilMap(t *testing.T) { type T struct { I map[string][]string } t1 := T{} t2 := T{I: map[string][]string{"hi": {"there"}}} if err := mergo.Merge(&t1, t2); err != nil { t.Fail() } if !reflect.DeepEqual(t2, T{I: map[string][]string{"hi": {"there"}}}) { t.FailNow() } }