[PATCH v3 8/8] test: rng: Add a UT testcase for the rng command

[Simon Glass]

Hi Sughosh,

On Fri, 4 Mar 2022 at 06:35, Sughosh Ganu <sughosh.ganu at linaro.org> wrote:
>
> The 'rng' command dumps a number of random bytes on the console. Add a
> set of tests for the 'rng' command. The test function performs basic
> sanity testing of the command.
>
> Since a unit test is being added for the command, enable it by default
> in the sandbox platforms.
>
> Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
> ---
>
> Changes since V2: None
>
>  cmd/Kconfig   |  1 +
>  test/dm/rng.c | 29 +++++++++++++++++++++++++++++
>  2 files changed, 30 insertions(+)

Reviewed-by: Simon Glass <sjg at chromium.org>

>
> diff --git a/cmd/Kconfig b/cmd/Kconfig
> index 5e25e45fd2..47f1e23ef0 100644
> --- a/cmd/Kconfig
> +++ b/cmd/Kconfig
> @@ -1810,6 +1810,7 @@ config CMD_GETTIME
>  config CMD_RNG
>         bool "rng command"
>         depends on DM_RNG
> +       default y if SANDBOX
>         select HEXDUMP
>         help
>           Print bytes from the hardware random number generator.
> diff --git a/test/dm/rng.c b/test/dm/rng.c
> index 5b34c93ed6..6d1f68848d 100644
> --- a/test/dm/rng.c
> +++ b/test/dm/rng.c
> @@ -25,3 +25,32 @@ static int dm_test_rng_read(struct unit_test_state *uts)
>         return 0;
>  }
>  DM_TEST(dm_test_rng_read, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
> +
> +/* Test the rng command */
> +static int dm_test_rng_cmd(struct unit_test_state *uts)
> +{
> +       struct udevice *dev;
> +
> +       ut_assertok(uclass_get_device(UCLASS_RNG, 0, &dev));
> +       ut_assertnonnull(dev);
> +
> +       ut_assertok(console_record_reset_enable());
> +
> +       run_command("rng", 0);
> +       ut_assert_nextlinen("00000000:");
> +       ut_assert_nextlinen("00000010:");
> +       ut_assert_nextlinen("00000020:");
> +       ut_assert_nextlinen("00000030:");

This is good enough for testing, except that here you don't have any
actual data. How come?

> +       ut_assert_console_end();
> +
> +       run_command("rng 0 10", 0);
> +       ut_assert_nextlinen("00000000:");
> +       ut_assert_console_end();
> +
> +       run_command("rng 20", 0);
> +       ut_assert_nextlinen("No RNG device");
> +       ut_assert_console_end();
> +
> +       return 0;
> +}
> +DM_TEST(dm_test_rng_cmd, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT | UT_TESTF_CONSOLE_REC);
> --
> 2.25.1
>

Regards,
SImon