Re: [PATCH v3] tests/unit: add unit test for qemu_hexdump()

["Daniel P. Berrangé" <berrange@redhat.com>]

On Thu, Nov 13, 2025 at 09:49:35AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> Test, that fix in previous commit make sense.
> 
> To not break compilation when we build without
> 'block', move hexdump.c out of "if have_block"
> in meson.build.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
> ---
> 
> v3: change meson.build to compile hexdump.c always
> 
>  tests/unit/test-cutils.c | 43 ++++++++++++++++++++++++++++++++++++++++
>  util/meson.build         |  2 +-
>  2 files changed, 44 insertions(+), 1 deletion(-)

> +static void test_qemu_hexdump_alignment(void)
> +{
> +    /*
> +     * Test that ASCII part is properly aligned for incomplete lines.
> +     * This test catches the bug that was fixed in previous commit
> +     * "util/hexdump: fix QEMU_HEXDUMP_LINE_WIDTH logic".
> +     *
> +     * We use data that is not aligned to 16 bytes, so last line
> +     * is incomplete.
> +     */
> +    const uint8_t data[] = {
> +        /* First line: 16 bytes */
> +        0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x57, 0x6f,  /* "Hello Wo" */
> +        0x72, 0x6c, 0x64, 0x21, 0x20, 0x54, 0x68, 0x69,  /* "rld! Thi" */
> +        /* Second line: 5 bytes (incomplete) */
> +        0x73, 0x20, 0x69, 0x73, 0x20                     /* "s is " */
> +    };
> +    char *output = NULL;

Could be  g_autofree, and avoid the later 'free()' call.

> +    size_t size;
> +    FILE *stream = open_memstream(&output, &size);
> +
> +    g_assert_nonnull(stream);
> +
> +    qemu_hexdump(stream, "test", data, sizeof(data));
> +    fclose(stream);
> +
> +    g_assert_nonnull(output);
> +
> +    /* We expect proper alignment of "s is" part on the second line */
> +    const char *expected =
> +        "test: 0000: 48 65 6c 6c  6f 20 57 6f  72 6c 64 21  20 54 68 69   Hello World! Thi\n"
> +        "test: 0010: 73 20 69 73  20                                      s is \n";
> +
> +    g_assert_cmpstr(output, ==, expected);
> +
> +    free(output);
> +}

The above comment is trivial, so

  Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>



With regards,
Daniel
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