[PATCH] tests: Fix libxlxml2domconfigtest

[Michal Prívozník]

On 11/11/22 03:25, Jim Fehlig wrote:
> Downstream CI recently encountered failures of libxlxml2domconfigtest when
> building libvirt packages against Xen 4.17 rc3 packages. The test fails on
> vnuma_hvm config, where suddently the actual json produced by
> libxl_domain_config_to_json() contains a 'pnode' entry in the 'vnuma_nodes'
> list, which is absent in the expected json. It appears the test has thus far
> passed by luck. E.g. I was able to make the test pass in the failing
> environment by changing the meson buildtype from debugoptimized to debug.
> 
> When a VM config contains vnuma settings, libxlMakeVnumaList() checks if the
> number of requested vnuma nodes exceeds the number of physical nodes. The
> number of physical nodes is retrieved with libxl_get_physinfo(), which can
> return wildly different results in the context of unit tests. This change
> mocks libxl_get_physinfo() to return consistent results. All fields of the
> libxl_physinfo struct are set to 0 except nr_nodes, which is set to 6 to
> ensure the vnuma_hvm configuration is properly tested.
> 
> Signed-off-by: Jim Fehlig <jfehlig at suse.com>
> ---
>  tests/libxlmock.c                           | 15 +++++++++++++++
>  tests/libxlxml2domconfigdata/vnuma-hvm.json |  5 +++++
>  2 files changed, 20 insertions(+)
> 
> diff --git a/tests/libxlmock.c b/tests/libxlmock.c
> index 4754597e5b..205d34df19 100644
> --- a/tests/libxlmock.c
> +++ b/tests/libxlmock.c
> @@ -70,6 +70,21 @@ VIR_MOCK_IMPL_RET_ARGS(libxl_get_version_info,
>      return &info;
>  }
>  
> +VIR_MOCK_IMPL_RET_ARGS(libxl_get_physinfo,
> +                       int,
> +                       libxl_ctx *, ctx,
> +                       libxl_physinfo *, physinfo)
> +{
> +    memset(physinfo, 0, sizeof(*physinfo));
> +    physinfo->nr_nodes = 6;
> +
> +    /* silence gcc warning about unused function */
> +    if (0)
> +        real_libxl_get_physinfo(ctx, physinfo);
> +
> +    return 0;
> +}
> +
>  VIR_MOCK_STUB_RET_ARGS(libxl_get_free_memory,
>                         int, 0,
>                         libxl_ctx *, ctx,
> diff --git a/tests/libxlxml2domconfigdata/vnuma-hvm.json b/tests/libxlxml2domconfigdata/vnuma-hvm.json
> index 2556c82d5f..c90ee823a4 100644
> --- a/tests/libxlxml2domconfigdata/vnuma-hvm.json
> +++ b/tests/libxlxml2domconfigdata/vnuma-hvm.json
> @@ -39,6 +39,7 @@
>                      41,
>                      51
>                  ],
> +		"pnode": 1,

These look misaligned... and in fact they are, because you've used TABs.
Can you please switch to spaces?

Reviewed-by: Michal Privoznik <mprivozn at redhat.com>

Michal