priority2.Ref = testValue(t, 6, int64(3))
	mv2.AddField(priority2)
	if mv.Equal(mv2) != types.False {
		t.Fatalf("mv.Equal(mv2) failed: %v", mv.Equal(mv2))
	}
}

func TestMapValueIsSet(t *testing.T) {
	mv := NewMapValue()
	if mv.IsSet(types.String("name")) != types.False {
		t.Error("map.IsSet('name') returned true for unset key")
	}
	mv.AddField(NewField(1, "name"))