[PATCH v5 3/4] test: add test for packet dissector

[Bruce Richardson]

On Thu, Aug 01, 2024 at 12:04:42PM -0700, Stephen Hemminger wrote:
> Some tests for new packet dissector.
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---
>  app/test/meson.build    |   1 +
>  app/test/test_dissect.c | 245 ++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 246 insertions(+)
>  create mode 100644 app/test/test_dissect.c
> 
> diff --git a/app/test/meson.build b/app/test/meson.build
> index e29258e6ec..9cd2051320 100644
> --- a/app/test/meson.build
> +++ b/app/test/meson.build
> @@ -62,6 +62,7 @@ source_file_deps = {
>      'test_debug.c': [],
>      'test_devargs.c': ['kvargs'],
>      'test_dispatcher.c': ['dispatcher'],
> +    'test_dissect.c': ['net'],
>      'test_distributor.c': ['distributor'],
>      'test_distributor_perf.c': ['distributor'],
>      'test_dmadev.c': ['dmadev', 'bus_vdev'],
> diff --git a/app/test/test_dissect.c b/app/test/test_dissect.c
> new file mode 100644
> index 0000000000..2c79acf766
> --- /dev/null
> +++ b/app/test/test_dissect.c

<snip>

> +static int
> +test_simple(void)
> +{
> +	struct rte_mbuf mb;
> +	uint8_t buf[RTE_MBUF_DEFAULT_BUF_SIZE];
> +	uint32_t data_len = PACKET_LEN;
> +	uint16_t src_port = rte_rand();
> +	const uint16_t dst_port = rte_cpu_to_be_16(9); /* Discard port */
> +	char obuf[LINE_MAX];
> +
> +	/* make a dummy packet */
> +	mbuf_prep(&mb, buf, sizeof(buf));
> +	add_header(&mb, data_len, src_port, dst_port);
> +	fill_data(&mb, data_len - mb.data_off);
> +
> +	rte_dissect_mbuf(obuf, sizeof(obuf), &mb, 0);
> +
> +	return TEST_SUCCESS;
> +}

What are these test cases actually verifying - can any of them actually
fail? I don't see the output being checked anywhere.

/Bruce