{nil, []int{22}},
	{[]int{}, []int{22}},
	{make([]int, 2, 4), nil},
	{make([]int, 2, 4), []int{}},
	{make([]int, 2, 4), []int{22}},
	{make([]int, 2, 4), []int{22, 33, 44}},
}

func TestAppend(t *testing.T) {
	for i, test := range appendTests {
		origLen, extraLen := len(test.orig), len(test.extra)
		want := append(test.orig, test.extra...)
		// Convert extra from []int to []Value.