{mustIP("::ffff:10.0.0.1"), 128},
	}
	for _, tt := range tests {
		got := tt.ip.BitLen()
		if got != tt.want {
			t.Errorf("BitLen(%v) = %d; want %d", tt.ip, got, tt.want)
		}
	}
}

func TestPrefixContains(t *testing.T) {
	tests := []struct {
		ipp  Prefix
		ip   Addr
		want bool
	}{
		{mustPrefix("9.8.7.6/0"), mustIP("9.8.7.6"), true},
		{mustPrefix("9.8.7.6/16"), mustIP("9.8.7.6"), true},