x:    make([]struct{}, 0),
			n:    0,
		},
	} {
		if !panics(func() { _ = Chunk(test.x, test.n) }) {
			t.Errorf("Chunk %s: got no panic, want panic", test.name)
		}
	}
}

func TestChunkRange(t *testing.T) {
	// Verify Chunk iteration can be stopped.
	var got [][]int
	for c := range Chunk([]int{1, 2, 3, 4, -100}, 2) {
		if len(got) == 2 {
			// Found enough values, break early.
			break
		}